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# Java Programmatic Universe

Java- write once, run away!

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## Posts

- [Learn Java 8 to 25 (LTS versions only): Migrate now](https://corejava25hours.com/java-8-to-25-features-java-migration-guide-stable-versions-only/) - 🚀 Java Feature Evolution from Java 8 to Java 11 to Java 17 to Java 21 to Java 25 - Full Code Examples & Real Benefits We’ll explore the most impactful developer-facing features from Java 8 to Java 11 to Java 17 to Java 21 to Java 25. For each feature, you’ll see: ✅ Modern
- [💻Learn Java Step 0: Complete Beginner’s Roadmap](https://corejava25hours.com/💻-step-0-core-java-syllabus-complete-beginner-to-confident-java-developer/) - Before writing your first class HelloWorld, you need clarity.This Core Java syllabus is designed as a hour-by-hour learning path, taking you from absolute beginner to a solid Java foundation that actually makes sense. Each step below is a tutorial step, written to be simple, practical, and code focused. 🔰 Java Basics & Setup Step 1:
- [Java Versions 7–25 Compared: What’s New and Improved](https://corejava25hours.com/java-7-vs-java-8-vs-java-9-vs-java-10/) - Java 7–25 version comparison guide: features, updates, and differences explained. Perfect for interview prep and developer learning.
- [Master Step 15: Powerful JSP Implicit Objects Techniques + Code Snippets](https://corejava25hours.com/step-15-jsp-implicit-objects/) - Master Step 15 with powerful JSP Implicit Objects techniques. Includes hands‑on code snippets for developers. Essential JSP Implicit Objects explained
- [Master Step 14: Powerful JSP Directives – Page, Include, Taglib + Code Snippets](https://corejava25hours.com/step-14-jsp-directives/) - Master Step 14 with powerful JSP Directives. Includes Page, Include, Taglib, and code snippets. Easy JSP Directives explained
- [Step 13: Proven JSP Tags Strategies You Must Know + Code](https://corejava25hours.com/step-13-jsp-tags/) - Discover proven JSP Tags strategies in Step 13. Practical code examples to boost your Java skills. Essential JSP Tags explained with clear examples
- [Step 12: Proven JSP Life Cycle Strategies You Must Know + Code](https://corejava25hours.com/step-12-jsp-life-cycle/) - Master Step 12 with powerful JSP Life Cycle techniques. Includes hands‑on code snippets for developers. Discover proven JSP Life Cycle strategies.
- [Step 11: Proven JSP API Strategies You Must Know + Code](https://corejava25hours.com/step-11-jsp-api/) - Discover proven JSP API strategies in Step 11. Practical code examples to boost your Java skills. Master Step 11 with powerful JSP API techniques.
- [Step 10: Proven JSP Definition Strategies You Must Know + Code](https://corejava25hours.com/step-10-jsp-definition/) - Discover proven JSP Definition strategies in Step 10. Practical code examples to boost your Java skills. Easy JSP Definition explained
- [Step 9: Proven Servlet Filter Strategies You Must Know + Code](https://corejava25hours.com/step-9-filters/) - Learn Step 9: Essential Servlet Filters explained with clear examples and practical code snippets, Discover proven Servlet Filter strategies.
- [Step 8: Powerful Session Management Techniques + Code Snippets](https://corejava25hours.com/step8-session-management-code/) - Learn Step 8 of Java programming: Session Management explained with clear examples and code snippets for beginners, step by step.
- [Step 7: ServletConfig and ServletContext Explained - Easy Java Tutorial with Code](https://corejava25hours.com/step7-servletconfig-and-servletcontext-code/) - ServletConfig and ServletContext explained in detail. Step 7 of your Java journey with easy concepts and practical code. Learn step by step!
- [Step 6: Unlock Java Fundamentals - Servlet Collaboration & Communication Made Simple with Code](https://corejava25hours.com/step6-servlet-collaboration-and-communication-code/) - Learn servlet collaboration and communication step by step! 💻 Step 6 of advanced Java explained with clear examples and code. Unlock Java fundamentals fast!
- [Step 5: Master the Working Process of Servlets - Complete Java Guide with Code Examples](https://corejava25hours.com/step5working-process-of-servlet-code/) - Unlock Java fundamentals fast! Step 5 covers the servlet working process with simple explanations and examples. Learn the servlet working process step by step!
- [Step 4: Servlet Life Cycle Explained - Easy Java Tutorial for Beginners](https://corejava25hours.com/step4-servlet-life-cycle/) - Unlock Java fundamentals fast! Step 4 covers the servlet life cycle with simple explanations and examples. Learn the servlet life cycle step by step!
- [Step 3: Servlet Creation Explained - Easy Java Tutorial for Beginners](https://corejava25hours.com/step-3-servlet-creation/) - Unlock Java fundamentals fast! Step 3 covers servlet creation with simple explanations and examples. Learn servlet creation step by step!
- [Step 2: Servlet API Explained - Easy Java Guide for Beginners](https://corejava25hours.com/step2-servlet-api/) - Unlock Java fundamentals fast! Step 2 covers Servlet API with simple explanations and examples. Learn Servlet API step by step!
- [Step 1: Servlet Definition Explained - Easy Java Guide for Beginners](https://corejava25hours.com/step1-servlet-definition/) - Unlock Java fundamentals fast! Step 1 covers servlet definition with simple explanations and examples. Learn servlet definition step by step!
- [Configuration for Advanced Java - Complete Setup Guide with Proven Tips](https://corejava25hours.com/configuration-for-advance-java/) - Complete guide to advanced Java configuration. Unlock fundamentals, setup methods, and practical tips explained clearly. Learn advanced Java step by step!
- [Top 100 Java Interview Questions -Ultimate Preparation Guide for Developers](https://corejava25hours.com/top-100-java-interview-questions/) - Prepare for your next job with the top 100 Java interview questions and answers. Master key concepts and boost your confidence.
- [💻Step 27: JDBC Explained - Easy Java Guide with Code (24th + 25th Hour)](https://corejava25hours.com/jdbc/) - Learn JDBC in Java step by step! 💻 In your 27th step and 24th & 25th hour, master database connectivity with clear code examples.
- [💻Step 26: Java Design Patterns Explained - Easy Guide with Code (23rd Hour)](https://corejava25hours.com/design-patterns/) - Step 26 of your Java journey: design patterns explained with code in under 23 hours. Perfect for beginners. Learn Java design patterns step by step!
- [💻Step 25: Java Reflection API Explained - Easy Guide with Code (22nd Hour)](https://corejava25hours.com/reflection-api/) - Unlock Java fundamentals fast! 💻 Step 25 covers Reflection API with easy definitions and practical code. Learn Java Reflection API step by step!
- [💻Step 24: Java Multithreading Explained - Easy Guide with Code (20th + 21st Hour)](https://corejava25hours.com/multithreading/) - Step 24 of your Java journey: multithreading explained with code in under 21 hours. Perfect for beginners. Learn Java multithreading step by step!
- [💻Step 23: Java I/O Package Explained - Easy Guide with Code (18th + 19th Hour)](https://corejava25hours.com/io-package/) - Step 23 of your Java journey: I/O package explained with code in under 19 hours. Perfect for beginners. Learn Java I/O package step by step!
- [💻Step 22: Java Exception Handling Explained - Easy Guide with Code (16th + 17th Hour)](https://corejava25hours.com/exception-handling/) - Step 22 of your Java journey: exception handling explained with code in under 17 hours. Perfect for beginners. Learn Java exception handling step by step!
- [💻Step 21: Proven Java Learning Path - Collection Frameworks Made Simple with Code (14th + 15th Hour)](https://corejava25hours.com/collection-frameworks/) - Step 21 of your Java journey: collection frameworks explained with code in under 15 hours. Perfect for beginners. Learn Java collection frameworks step by step!
- [💻Step 20: Java String Handling Explained - Easy Guide with Code (13th Hour)](https://corejava25hours.com/string-handling/) - Step 20 of your Java journey: string handling explained with code in under 13 hours. Perfect for beginners. Learn Java string handling step by step!
- [💻Step 19: Java Arrays Explained - Easy Guide with Code (12th Hour)](https://corejava25hours.com/array/) - Unlock Java fundamentals fast! 💻 Step 19 covers arrays with easy definitions and practical code. Learn Java arrays step by step!
- [💻Step 18: Java Interfaces Explained - Easy Guide with Code (12th Hour)](https://corejava25hours.com/interface/) - Step 18 of your Java journey: interfaces explained with code in under 12 hours. Perfect for beginners. Master Java interfaces in your 12th hour.
- [💻Step 17: This and Super Keywords - Unlock Java Fundamentals + Code (11th Hour)](https://corejava25hours.com/this-and-super-keywords/) - Unlock Java fundamentals fast! 💻 Step 17 covers “this” and “super” keywords with easy definitions and practical code. Learn step by step!
- [💻Step 16: Java Encapsulation Explained - Easy OOP Guide with Code (11th Hour)](https://corejava25hours.com/oops-4th-conceptencapsulation-8th-hour/) - Unlock OOP fundamentals fast! 💻 Step 16 covers Java encapsulation with easy definitions and practical code. Learn Java encapsulation step by step!
- [💻Step 15: Java Abstraction Explained - Easy OOP Guide with Code (10th Hour)](https://corejava25hours.com/oops-3rd-conceptabstraction-7th-hour/) - Unlock OOP fundamentals fast! 💻 Step 15 covers Java abstraction with easy definitions and practical code. Learn Java abstraction step by step!
- [💻Step 14: Java Polymorphism Explained - Easy OOP Guide with Code (9th Hour)](https://corejava25hours.com/oops-2nd-conceptpolymorphism-7th-hour/) - Master Java polymorphism in your 9th hour. 💻 A proven guide with code examples for beginners. Learn Java polymorphism step by step!
- [💻Step 13: Java Inheritance Explained - Easy OOP Guide with Code (8th Hour)](https://corejava25hours.com/oops-1st-conceptinheritance-6th-hour/) - Master Java inheritance in your 13th step and 8th hour. 💻 A proven guide with code examples for beginners. Learn Java inheritance step by step!
- [💻Step 12: Java Packages Explained - Easy Guide with Code (7th Hour)](https://corejava25hours.com/packages-5th-hour/) - Master Java packages in your 12th step and 7th hour. 💻 A proven guide with code examples for beginners. Learn Java packages step by step!
- [💻Step 11: Java Nested Classes Explained - Easy Guide with Code (7th Hour)](https://corejava25hours.com/nested-classes/) - Unlock Java fundamentals fast! 💻 Step 11 covers nested classes with easy definitions and practical code. Perfect for beginners.
- [💻Step 10: Java Type Casting and Boxing Explained - Easy Guide with Code (6th Hour)](https://corejava25hours.com/type-casting-boxinginboxing-and-outboxing/) - Unlock Java fundamentals fast! 💻 Step 10 covers type casting and boxing/unboxing with easy definitions and practical code.
- [💻Step 9: Java Operators Explained - Easy Guide with Code (6th Hour)](https://corejava25hours.com/java-operators/) - Learn Java operators step by step! 💻 In your 6th hour, master key concepts with clear code examples. Perfect for beginners.
- [💻Step 8: Java Modifiers Explained - Easy Guide with Code (5th Hour)](https://corejava25hours.com/modifiers-in-java-4th-hour/) - Learn Java modifiers step by step! 💻 In your 8th step and 5th hour, master key concepts with clear code examples. Perfect for beginners.
- [💻Step 7: Java Variables Explained - Easy Guide with Code (4th Hour)](https://corejava25hours.com/variables/) - Step 7 of your Java journey: variables explained with code in under 4 hours. Perfect for beginners. Learn Java variables step by step!
- [💻Step 6: Java Constructors Explained - Easy Guide with Code (3rd Hour)](https://corejava25hours.com/constructor-and-method/) - Learn Java constructors step by step! 💻 In your 3rd hour, master key concepts with clear code examples. Perfect for beginners.
- [💻Step 5: Java Datatypes Explained - Easy Guide with Code (2nd Hour)](https://corejava25hours.com/datatypes-first-hour/) - Learn Java datatypes step by step! 💻 In your 2nd hour, master key concepts with clear code examples. Perfect for beginners.
- [💻 Step 4: Classes & Objects -Unlock Java Fundamentals in Your 2nd Hour](https://corejava25hours.com/classes-and-objects/) - Learn Java classes and objects step by step! 💻 In your 2nd hour, master key concepts with simple examples, perfect for beginners.
- [💻3: JVM, JRE, JDK - Unlock Java components](https://corejava25hours.com/java-components-jvmjrejdk-first-hour/) - 💻 Step 3 covers JVM, JRE, and JDK to boost your programming skills quickly So understand JVM, JRE, and JDK essentials for coding success.
- [💻 Step 2: Java Definition Explained - Fast & Easy Learning](https://corejava25hours.com/java-definition-first-hour/) - Step 2 of your Java journey: clear definitions explained in under an hour. Simple definitions, practical examples, and easy learning for new programmers.
- [Step 1: How to Install Java and IDEs on Windows, Linux, and Mac for Beginners](https://corejava25hours.com/installation-of-java/) - Discover comprehensive instructions for installing Java, configuring environment variables, and setting up IDEs to start coding in Java today.
- [Topic 18 - SQL for Big Data and Cloud](https://corejava25hours.com/topic-18-sql-for-big-data-and-cloud/) - Play Store Application link – SQL in 18 steps - App on Google Play SQL is not just for traditional databases anymore. With the rise of Big Data and Cloud computing, SQL has evolved to work with massive datasets and distributed systems. Let’s explore how SQL is used in Big Data platforms like Hadoop and cloud
- [Topic 17 - Advanced SQL Concepts](https://corejava25hours.com/topic-17-advanced-sql-concepts/) - Play Store Application link – SQL in 18 steps - App on Google Play SQL is not just about simple queries; it also includes powerful features that help in solving complex problems efficiently. In this post, we will cover some advanced SQL concepts that are widely used in real-world applications. 1. Common Table Expressions (CTEs) (WITH)
- [Topic 16 - SQL Backup and Restore: Protecting Your Data](https://corejava25hours.com/topic-16-sql-backup-and-restore-protecting-your-data/) - Play Store Application link – SQL in 18 steps - App on Google Play Data is the backbone of any application. Whether you’re running a small blog or managing an enterprise system, keeping your database safe is crucial. SQL provides various backup and restore mechanisms, differing slightly across database management systems (DBMS). Let’s dive into how
- [Topic 15 - SQL User Management and Security](https://corejava25hours.com/topic-15-sql-user-management-and-security/) - Play Store Application link – SQL in 18 steps - App on Google Play Managing users and securing a database is crucial for maintaining data integrity and preventing unauthorized access. In this blog, we will explore SQL user management and security with practical examples across different databases like MySQL and Oracle. 1. Creating and Managing Users
- [Topic 14 - SQL Triggers: Automating Database Actions](https://corejava25hours.com/topic-14-sql-triggers-automating-database-actions/) - Play Store Application link – SQL in 18 steps - App on Google Play In the world of databases, sometimes we need to perform specific actions automatically when certain events occur. This is where SQL Triggers come into play. Think of them as "database alarms" that get triggered before or after a particular action (like inserting,
- [Topic 13 - SQL Stored Procedures and Functions](https://corejava25hours.com/topic-13-sql-stored-procedures-and-functions/) - Play Store Application link – SQL in 18 steps - App on Google Play Stored procedures and functions help automate and reuse SQL queries. Think of them as reusable scripts that can execute database operations efficiently. Instead of writing the same query multiple times, you can call a stored procedure or function when needed. 1. What
- [Topic 12 - SQL Indexing and Optimization](https://corejava25hours.com/topic-12-sql-indexing-and-optimization/) - Play Store Application link – SQL in 18 steps - App on Google Play When working with databases, performance matters! Imagine a huge library where books are randomly placed on shelves—finding a book would take forever. Indexing in SQL is like organizing books alphabetically so you can find them quickly. Let’s explore how SQL indexing speeds
- [Topic 11 - SQL Transactions and Concurrency Control – Keeping Data Safe and Consistent!](https://corejava25hours.com/topic-11-sql-transactions-and-concurrency-control-keeping-data-safe-and-consistent/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction Imagine you’re booking a flight ticket online. You select a seat, make a payment, and expect confirmation. What if the system crashes after deducting your money but before confirming your seat? SQL transactions prevent such issues by ensuring database operations are
- [Topic 10 - SQL Views – Virtual Tables for Simplified Queries!](https://corejava25hours.com/topic-10-sql-views-virtual-tables-for-simplified-queries/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction Imagine you manage an online store, and your sales team frequently needs a list of high-value customers (those who placed orders above $500). Instead of writing the same complex query every time, SQL Views let you save that query as a
- [Topic 9 - SQL Subqueries – Queries Inside Queries](https://corejava25hours.com/topic-9-sql-subqueries-queries-inside-queries/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction Imagine you run a bookstore and want to find books that are more expensive than the average book price. Instead of first calculating the average price manually, then checking books above that price, SQL allows you to do both in one
- [Topic 8 - SQL Joins – Combining Data from Multiple Tables](https://corejava25hours.com/topic-8-sql-joins-combining-data-from-multiple-tables/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction Imagine you have two lists—one with customer details and another with their orders. How do you combine them? That’s where SQL JOINS come in! Joins help fetch data from multiple tables based on a common column. 1. INNER JOIN – Common
- [Topic 7 - SQL Operators – Mastering Data Filtering & Calculations](https://corejava25hours.com/topic-7-sql-operators-mastering-data-filtering-calculations/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction SQL Operators help in performing calculations, filtering data, and making comparisons. Think of them as tools that refine search results, just like using filters while shopping online! 1. Arithmetic Operators – Performing Calculations These operators help in performing basic math calculations.
- [Topic 6 - SQL Data Query Language (DQL)](https://corejava25hours.com/topic-6-sql-data-query-language-dql/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction to DQL DQL (Data Query Language) is used to retrieve data from databases. Think of it as searching for specific information in a large list—like finding a particular contact in your phone. 1. SELECT Statement – Fetching Data The SELECT statement
- [Topic 5 - SQL Data Manipulation Language (DML)](https://corejava25hours.com/topic-5-sql-data-manipulation-language-dml/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction to DML DML (Data Manipulation Language) allows us to insert, update, delete, and merge data within database tables. Think of it like adding, modifying, or removing items from a shopping list. 1. INSERT INTO – Adding Data to Tables Single Row
- [Topic 4 - SQL Data Definition Language (DDL)](https://corejava25hours.com/topic-4-sql-data-definition-language-ddl/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction to DDL DDL (Data Definition Language) is used to define and manage database structures. Think of it as designing a house before moving in—you decide on the number of rooms (tables), their size (columns), and the rules (constraints) they must follow.
- [Topic 3 - Database Design and Normalization](https://corejava25hours.com/topic-3-database-design-and-normalization/) - Play Store Application link – SQL in 18 steps - App on Google Play Introduction to Database Design Database design is like organizing a store’s inventory. If products are scattered, finding an item takes longer. A well-designed database helps in storing, retrieving, and managing data efficiently. Key Aspects of Database Design: Understand Requirements → What data
- [Topic 2 - SQL Basics: Getting Started with SQL](https://corejava25hours.com/topic-2-sql-basics-getting-started-with-sql/) - Play Store Application link – SQL in 18 steps - App on Google Play SQL Syntax and Commands SQL is a simple yet powerful language used to interact with databases. Think of it as giving instructions to a digital assistant that manages your data. Here’s a basic structure of an SQL query: SELECT column_name FROM table_name
- [Topic 1 - Introduction to SQL: A Beginner's Guide](https://corejava25hours.com/topic-1-introduction-to-sql-a-beginners-guide/) - Play Store Application link – SQL in 18 steps - App on Google Play What is SQL? Imagine you own a bookstore, and you have a notebook where you write down every book's title, author, price, and stock. Now, what if your store grows and you have thousands of books? Managing this manually would be a
- [Topic 0- SQL TOPICS](https://corejava25hours.com/sql-topics/) - Play Store Application link – SQL in 18 steps - App on Google Play 1. Introduction to SQL What is SQL? Importance of SQL SQL vs NoSQL SQL Standards (SQL-92, SQL-99, SQL-2003, SQL-2011) 2. SQL Basics SQL Syntax and Commands SQL Data Types MySQL Data Types Oracle Data Types PostgreSQL, SQL Server, etc. 3. Database Design
- [SQL (Quick Points)](https://corejava25hours.com/sqlstructured-query-language/) - Play Store Application link – SQL in 18 steps - App on Google Play BASIC QUERIES 1- distinct- to return different values [ select distinct id, name from table ] 2- where- to filter records 3- And/Or -(i) AND =when both conditions are true(ii) OR= when any one condition is true. 4- orderBy- used to sort
- [Topic 1:- 5 steps of first 'Hello world' application in Spring Boot](https://corejava25hours.com/step-1-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Spring Boot Introduction: In this guide, we will walk through the basics of Spring Boot, including setting up a project and creating a simple REST API. Let’s dive straight into the code. Github Project link - https://github.com/kuldeep101990/SpringBoot Step 1: Setting Up
- [Dot (.) Net Topic List](https://corejava25hours.com/dot-net-topic-list/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play 0. Comparison with Java Language Features Comparison C# vs. Java Syntax and Features Framework Comparison Spring vs. ASP.NET Core Data Access Libraries Hibernate vs. Entity Framework Core 1. Introduction to .NET Overview of .NET .NET Framework vs. .NET Core vs.
- [1- Introduction to .NET for Java Developers](https://corejava25hours.com/introduction-to-net-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play If you're a seasoned Java developer looking to expand your horizons into the world of .NET, you're in for a treat. .NET, developed by Microsoft, offers a rich framework for building a variety of applications, from web and desktop apps
- [2- Getting Started with C# for Java Developers](https://corejava25hours.com/2-getting-started-with-c-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Welcome back! In this post, we'll dive into the basics of C# for developers who are already familiar with Java. We'll cover the fundamental syntax, object-oriented programming concepts, and exception handling. I'll provide real-world examples and draw comparisons with Java
- [3- Advanced C# Features for Java Developers](https://corejava25hours.com/3-advanced-c-features-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Welcome back! If you're a Java developer stepping into the world of C#, you'll find many advanced features that can enhance your coding experience. In this post, we’ll dive into some of the more advanced C# concepts, including generics, collections,
- [4- Working with Data in C#: Entity Framework Core and ADO.NET](https://corejava25hours.com/4-working-with-data-in-c-entity-framework-core-and-ado-net/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Welcome! If you’re transitioning from Java to C#, understanding how to work with data is crucial. In this post, we'll cover Entity Framework Core and ADO.NET for data access in C#. We'll use real-world examples and draw parallels to Java
- [5- Web Development in C#: A Guide for Java Developers](https://corejava25hours.com/5-web-development-in-c-a-guide-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play If you're a Java developer venturing into web development with C#, you'll find ASP.NET Core to be a powerful framework for building web applications and APIs. This guide will walk you through the basics of ASP.NET Core, including MVC architecture,
- [6- Modern Web Practices in C#: ASP.NET Core with Angular/React and API Development](https://corejava25hours.com/6-modern-web-practices-in-c-asp-net-core-with-angular-react-and-api-development/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Welcome back! As a Java developer, diving into modern web practices with C# can open up a world of possibilities. In this post, we'll cover setting up Angular or React with ASP.NET Core, building Single Page Applications (SPAs), and best
- [7- Asynchronous Programming in C#: A Guide for Java Developers](https://corejava25hours.com/7-asynchronous-programming-in-c-a-guide-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play As a Java developer, you are likely familiar with asynchronous programming concepts and tools like Future, CompletableFuture, and the ExecutorService. In C#, the async and await keywords, along with the Task Parallel Library (TPL), provide powerful ways to handle asynchronous
- [8- Unit Testing and Test-Driven Development (TDD) in C#: A Guide for Java Developers](https://corejava25hours.com/8-unit-testing-and-test-driven-development-tdd-in-c-a-guide-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Unit testing and Test-Driven Development (TDD) are essential practices for creating robust and maintainable software. As a Java developer, you're likely familiar with JUnit and Mockito for unit testing. In C#, xUnit and NUnit are popular testing frameworks that serve
- [9- Deployment and Configuration in C#: A Guide for Java Developers](https://corejava25hours.com/9-deployment-and-configuration-in-c-a-guide-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Deploying and configuring applications are crucial steps in the software development lifecycle. If you're a Java developer familiar with tools like Tomcat, Docker, and Spring's application.properties, this guide will help you understand how to create, deploy, and configure C# applications.
- [- Comparing C# with Java: A Guide for Java Developers -](https://corejava25hours.com/10-comparing-c-with-java-a-guide-for-java-developers/) - Play Store Application link – Java to .NET in 9 Steps - App on Google Play Switching from Java to C# can feel like moving to a familiar yet slightly different neighborhood. Both languages share many similarities due to their object-oriented nature, but they also have distinct features and frameworks. This blog post will explore key
- [Bonus - AngularJS to Angular – A Java Developer's Guide](https://corejava25hours.com/angular-2/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play In the world of web development, Angular has seen significant evolution, starting with AngularJS (1.x) and progressing to what we now know as Angular (2.x and beyond). For a Java developer, Angular's component-based architecture can feel familiar, especially if you've
- [Dart from Java](https://corejava25hours.com/dart-from-java/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play 1. Introduction to Dart Overview of Dart What is Dart? History and Evolution Dart vs. Java Syntax Differences Language Features Comparison Setting Up Dart Development Environment Installing Dart SDK Setting up IDEs (VS Code, IntelliJ IDEA) 2. Dart Basics Language
- [1 - Introduction to Dart for Java Developers](https://corejava25hours.com/introduction-to-dart-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Welcome to the world of Dart! If you’re a Java developer, you’re already familiar with many programming concepts. In this guide, we’ll explore Dart, a modern programming language that you can leverage with your existing Java knowledge. Let’s dive in!
- [2- Dart Basics for Java Developers](https://corejava25hours.com/2-dart-basics-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Welcome back! Now that you have a basic understanding of Dart, let’s dive into the Dart basics. If you know Java, you’ll find many similarities in Dart, but with some modern twists. We'll cover Dart’s syntax, control structures, and functions.
- [3- Object-Oriented Programming in Dart for Java Developers](https://corejava25hours.com/3-object-oriented-programming-in-dart-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Welcome to our exploration of object-oriented programming (OOP) in Dart! If you’re coming from a Java background, you’ll find Dart’s approach to OOP quite familiar. In this post, we’ll cover classes and objects, inheritance, polymorphism, and encapsulation in Dart, with
- [4-Mastering Collections and Generics in Dart for Java Developers](https://corejava25hours.com/4-mastering-collections-and-generics-in-dart-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Welcome to the world of collections and generics in Dart! If you're coming from a Java background, you'll find many similarities but also some interesting differences. In this post, we'll dive into Dart’s Lists, Sets, Maps, and Generics, drawing parallels
- [5- Mastering Asynchronous Programming in Dart for Java Developers](https://corejava25hours.com/5-mastering-asynchronous-programming-in-dart-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Asynchronous programming is crucial for writing efficient, non-blocking code, especially when dealing with I/O operations, such as fetching data from a server or reading files. If you're familiar with Java, Dart’s approach to asynchronous programming will have some familiar concepts
- [6- Error Handling in Dart: A Java Developer’s Guide](https://corejava25hours.com/6-error-handling-in-dart-a-java-developers-guide/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Error handling is a critical aspect of programming that ensures your application can gracefully handle unexpected issues. If you're familiar with Java, you'll find that Dart has some similar concepts but with its own syntax and features. In this blog
- [7- Exploring Dart Libraries and Packages: A Java Developer’s Guide](https://corejava25hours.com/7-exploring-dart-libraries-and-packages-a-java-developers-guide/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play When developing applications, libraries and packages are your best friends—they help you avoid reinventing the wheel by providing pre-built functionalities. For Java developers transitioning to Dart, understanding how to use Dart’s libraries and packages is crucial. This guide will walk
- [8- Mastering Advanced Dart Features: Mixins and Extension Methods for Java Developers](https://corejava25hours.com/8-mastering-advanced-dart-features-mixins-and-extension-methods-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play As a Java developer diving into Dart, you’ll find some advanced features that may seem new but are quite powerful. Two such features are Mixins and Extension Methods. These concepts enhance Dart’s flexibility and functionality, allowing you to write more
- [9- Testing in Dart: A Guide for Java Developers](https://corejava25hours.com/9-testing-in-dart-a-guide-for-java-developers/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Testing is crucial in software development to ensure your code works as expected and to catch any issues early. For Java developers transitioning to Dart, the testing approach might differ slightly, but the core concepts remain the same. This guide
- [10- Deploying and Configuring Dart Applications: A Java Developer's Guide](https://corejava25hours.com/10-deploying-and-configuring-dart-applications-a-java-developers-guide/) - Play Store Application link – Java to Dart in 10 Steps - App on Google Play Deploying and configuring Dart applications involves steps that are somewhat similar to Java but have their own unique processes and tools. This guide will help Java developers understand how to build and configure Dart applications, drawing comparisons to familiar Java
- [Angular Framework: Interview Questions/Answers](https://corejava25hours.com/angular-framework-interview-questions-answers/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play What is Angular Framework? Angular Framework is an open-source front-end development framework used to build modern web applications. What is a Component in Angular? A component is a building block of an Angular application that contains the logic and templates
- [Topic 19: 4 points for Optimization Techniques in Angular](https://corejava25hours.com/angular-step-19-optimization-techniques-for-java-developers/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Optimization in Java vs Angular In Java applications, performance optimizations are typically done at the code or configuration level. You might focus on optimizing database queries, memory management, and using libraries or tools like JVM tuning or profilers (e.g., VisualVM).
- [Topic 18: Deployment and Hosting](https://corejava25hours.com/angular-step-15-deployment-and-hosting/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Deployment in Java vs Angular In Java web applications, deployment typically involves packaging your application into a WAR (Web Application Archive) or JAR (Java Archive) file and then deploying it to a server. Common Java servers include Tomcat, JBoss, or
- [Topic 17: Unit Testing and Debugging](https://corejava25hours.com/angular-step-18-unit-testing-and-debugging-for-java-developers/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Unit Testing in Java vs Angular In Java, unit testing is primarily done using frameworks like JUnit or TestNG. JUnit provides a way to test individual components (like classes and methods) in isolation from the rest of the application. Java
- [Topic 16: 5 steps for Authentication and Security](https://corejava25hours.com/angular-step-16-authentication-and-security-for-java-developers/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Authentication in Java vs angular In Java, particularly with Spring Security, JWT (JSON Web Token) authentication is widely used for securing REST APIs. The token is typically generated on the server-side and then sent to the client. Once the client
- [Topic 15: 4 steps for File Upload and Handling](https://corejava25hours.com/angular-step-15-file-upload-and-handling-for-java-developers/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play File Uploads in Java vs Angular In Java, file uploads are typically handled by MultipartFile in Spring or using HttpURLConnection for raw file uploads. When dealing with file uploads in Spring, the framework provides built-in support for handling file uploads
- [Topic 14: 3 steps to understand working with HTTP Client](https://corejava25hours.com/angular-step-14-http-client/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step14 HTTP Requests in Java vs Angular In Java, making HTTP requests typically involves using classes like HttpURLConnection or higher-level libraries like Apache HttpClient or RestTemplate in Spring. Java Example (RestTemplate): RestTemplate restTemplate = new RestTemplate();
- [Topic 13: 4 steps about State Management with NgRx](https://corejava25hours.com/angular-step-13-pipes/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Introduction In Angular, managing application state across different components and services can become complex, especially in large-scale applications. This is where state management frameworks like NgRx come into play. For Java developers, you can think of NgRx as a counterpart
- [Topic 12: Advanced Routing(2 route guards, nested and dynamic routes, lazy loading)](https://corejava25hours.com/angular-step-12-directives/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Routing is an essential feature in Angular that allows developers to navigate between different views or components within a web application. Much like Java-based web frameworks such as Spring MVC or JSF, Angular provides advanced routing features, including route guards,
- [Topic 11: 3 steps about working with Pipes](https://corejava25hours.com/angular-step-11-forms/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play In both Angular and Java, data transformation is an essential part of developing responsive and interactive applications. Angular’s Pipes allow developers to easily format, transform, and filter data within templates, much like how Java uses formatters and filters to manipulate
- [Topic 10: Observables and RxJS](https://corejava25hours.com/angular-step-10-observables-and-rxjs/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step10 In modern web development, handling asynchronous data streams is crucial for building interactive applications. In Angular, Observables and the RxJS library provide the means to manage asynchronous data efficiently. For Java developers, this concept is
- [Topic 9: Forms – Template-Driven and Reactive](https://corejava25hours.com/angular-step-9-dependency-injection/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Forms are an essential part of any application, enabling users to input and submit data. Angular provides two approaches for handling forms: Template-Driven Forms and Reactive Forms. For Java developers, these concepts can be related to managing user input through
- [Topic 8: Services (with 3 usage) and Dependency Injection](https://corejava25hours.com/angular-step-8-services/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step8 In this step, we’ll explore Angular services, which allow you to share data, methods, or functionality across components. For Java developers, this is similar to using service classes in Java to manage business logic, data
- [Topic 7: 4 steps to understand Structural Directives and Templates](https://corejava25hours.com/angular-step-7-ng-template/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step7 In this step, we’ll dive into Angular’s structural directives like *ngIf, *ngFor, and ngSwitch, and explore how ng-template can be used for dynamic content rendering. For Java developers, this is akin to using conditional logic
- [Topic 6: Two-Way Data Binding and child-parent component communication](https://corejava25hours.com/angular-step-6-two-way-data-binding/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step6 In this step, we’ll explore two-way data binding and parent-child communication in Angular, comparing these concepts to familiar patterns in Java. Two-way data binding allows seamless interaction between the component and template, much like managing
- [Topic 5: - 4 steps to understand One-Way Data Binding](https://corejava25hours.com/angular-step-5-one-way-data-binding/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step5 In this step, we’ll explore one-way data binding in Angular, which facilitates communication between your component logic and the template. For Java developers, this is similar to the interaction between a controller and a view
- [Topic 4:- 3 step to create first Component and Setting Up Routing](https://corejava25hours.com/angular-step-4-first-component-and-routing/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step4 In this step, we’ll explore how to create a new component in Angular and set up routing. For Java developers, Angular routing is similar to URL mapping in a Spring Boot application, where different endpoints
- [Topic 3:- 3 points to understand angular components](https://corejava25hours.com/angular-8-step-3-components/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/angular-step3 In Angular, components are the core building blocks of your application, much like classes in Java. Components handle the UI logic and presentation in your Angular app. Every part of the UI you see is
- [Topic 2 - 4 folders to understand angular project structure](https://corejava25hours.com/angular-project-structure-step-2/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play Note - According to nodeJs version installed in system, project structure might differ. Github project link - https://github.com/kuldeep101990/angular-step2 In software development, project structure plays a crucial role in organizing code efficiently. If you’re a Java developer, think of Angular’s folder
- [Topic 1- 6 steps of Angular Installation for Java Developers](https://corejava25hours.com/angular-installation/) - Play Store Application link – Java to Angular in 19 Steps - App on Google Play For Java developers transitioning to Angular, setting up Angular is akin to setting up your Java environment with tools like the JDK, Maven, or Spring Boot. This guide will walk you through the Angular setup step-by-step while drawing parallels to
- [Step 4 - Functions and their types in TypeScript](https://corejava25hours.com/step-4-functions-and-their-types-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Functions in TypeScript: An Overview Functions in TypeScript are versatile tools that can be assigned to variables, passed around as arguments, and returned from other functions, just like in Java. This flexibility makes them powerful for creating reusable and maintainable
- [Step 3 - Type annotations and inference](https://corejava25hours.com/step-3-type-annotations-and-inference/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Understanding Type Annotations and Inference in TypeScript TypeScript helps you write safer code by letting you define the types of your variables, function parameters, and return values. This is similar to how you would use data types in Java to
- [Step 2 - Basic Data Types in TypeScript](https://corejava25hours.com/step-2-basic-data-types-in-typescriptstep-2/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Understanding Basic Data Types In TypeScript, basic data types help define what kind of values your variables can hold. Think of these data types as categories for the data, similar to Java where you have int, String, boolean, and so
- [Step 1 - Variables and Constants in TypeScript](https://corejava25hours.com/step-1-variables-and-constants-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play What are Variables and Constants? Variables and constants are like containers for holding data in your code. Just as in Java, where you use int, String, or double to store different types of values, TypeScript uses variables and constants to
- [TypeScript - Interview Questions & Answers](https://corejava25hours.com/typescript-interview-questions-answers/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play What is TypeScript and how is it different from JavaScript? TypeScript is a superset of JavaScript that adds optional static typing and other features, such as interfaces and classes. TypeScript allows developers to catch errors early and write more maintainable
- [Step 14 - Advanced TypeScript Features](https://corejava25hours.com/step-14-advanced-typescript-features/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play TypeScript offers several advanced features that enhance type safety and flexibility in your code. In this step, we'll explore Conditional Types, Mapped Types, and Type Aliases, providing comparisons with Java where applicable. Conditional Types Conditional types enable you to create
- [Step 13 - Asynchronous programming with TypeScript](https://corejava25hours.com/step-13-asynchronous-programming-with-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Asynchronous programming is crucial for building scalable and responsive applications. It allows code to run without blocking the main thread, improving performance and user experience. In this step, we’ll explore how to handle asynchronous operations in TypeScript and compare these
- [Step 12 - Introduction to Modules in TypeScript](https://corejava25hours.com/step-12-introduction-to-modules-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Step 12 - Introduction to Modules in TypeScript Modules in TypeScript help you organize and manage code by breaking it into reusable pieces that can be imported and used across your application. Think of modules as separate files or collections
- [Step 11 - Decorators in TypeScript](https://corejava25hours.com/step-11-decorators-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Decorators in TypeScript are a way to add extra behavior to classes, methods, properties, or other declarations. They’re similar to annotations in Java, providing a powerful way to modify or enhance the functionality of your code. Defining a Decorator A
- [Step 10 - Generics in TypeScript](https://corejava25hours.com/step-10-generics-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Generics in TypeScript are like Java’s generics, allowing you to write code that can handle different types without knowing them upfront. They make your code more flexible and reusable by working with various data types in a type-safe manner. Introduction
- [Step 9 - Classes and inheritance in TypeScript](https://corejava25hours.com/step-9-classes-and-inheritance-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play In TypeScript, classes are used to define and create objects with shared properties and methods, much like classes in Java. They also support inheritance, allowing you to build new classes based on existing ones. Classes in TypeScript Classes in TypeScript
- [Step 8 - Type guards and type assertions in TypeScript](https://corejava25hours.com/step-8-type-guards-and-type-assertions-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play In TypeScript, managing different types of values can sometimes be tricky, especially when you're not sure about a value's type at runtime. This is where type guards and type assertions become useful. If you're familiar with Java, think of type
- [Step 7 - Union and intersection types in TypeScript](https://corejava25hours.com/step-7-union-and-intersection-types-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play In TypeScript, union and intersection types are like flexible tools that help you define variables and functions more precisely. Think of them as ways to create complex data structures, similar to how you might use interfaces and class inheritance in
- [Step 6 - Array and tuple types in TypeScript](https://corejava25hours.com/step-6-array-and-tuple-types-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play Arrays and tuples are fundamental data structures in TypeScript, each serving different purposes. Arrays are used for collections of similar items, while tuples are used for fixed collections of items with different types. Array Types In TypeScript, arrays are used
- [Step 5 - Object types and interfaces in TypeScript](https://corejava25hours.com/step-5-object-types-and-interfaces-in-typescript/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play In TypeScript, objects and interfaces are crucial for structuring and defining data shapes. They help you manage and enforce the structure of data in a way similar to classes in Java. Defining an Interface An interface in TypeScript defines the
- [Step 0 - TypeScript Introduction](https://corejava25hours.com/step-0-typescript-introduction/) - Play Store Application link – Java to TypeScript in 14 Steps - App on Google Play What is TypeScript? Think of TypeScript as an upgraded version of JavaScript, just like how Java 8 improved Java's capabilities. TypeScript adds extra features to JavaScript that help catch mistakes early and make coding easier. It’s like having a helpful
- [Step 0- AngularJs Definition and setup (For Java Developers)](https://corejava25hours.com/angularjs-definition/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Step 0 - AngularJS Definition and Code Setup Definition: AngularJS is a JavaScript framework based on the MVC (Model-View-Controller) architectural pattern, designed to build dynamic web applications. Comparing with Java (Servlets): In Java, especially with Servlets, we follow a similar
- [Step 1 - AngularJs Expressions (For Java Developers)](https://corejava25hours.com/angularjs-expressions/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Definition: AngularJS expressions allow you to bind data to your HTML, similar to how Java's JSP can display dynamic data. In AngularJS, expressions let you dynamically show data from your model (JavaScript object) inside your HTML. Comparing with Java (Servlets
- [Step 2-AngularJs Directives (For Java Developers)](https://corejava25hours.com/angularjs-directives/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play AngularJS Directives introduce AngularJS functionalities to HTML, allowing you to extend HTML attributes and enhance your web applications. For a Java developer familiar with Core Java, Servlets, and HTML, you can think of AngularJS Directives as something similar to how
- [Step 3: AngularJS Modules (For Java Developers)](https://corejava25hours.com/angularjs-modules/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play What is an AngularJS Module? An AngularJS module is a container that holds different components like controllers, services, directives, and filters. It's similar to how we organize Java classes into packages, except in AngularJS, it bundles together functionalities to build
- [Step 4 - AngularJS Scopes (For Java Developers)](https://corejava25hours.com/angularjs-scopes/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play What is Scope in AngularJS? In AngularJS, scope is an object that binds the HTML view to the controller. It's used to define properties and functions that can be accessed in both the view (HTML) and the controller (JavaScript). You
- [Step 5-AngularJS Controller (For Java Developers)](https://corejava25hours.com/angularjs-controller/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play In AngularJS, a controller is like a Java Servlet that controls how data is processed and displayed on the view (HTML page). It manages the data and business logic for your application. Java Comparison: In Java, you typically use Servlets
- [Step 6-AngularJS Filters (For Java Developers)](https://corejava25hours.com/angularjs-filters/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play In AngularJS, filters are used to format or transform data before displaying it in the view (HTML). If you're familiar with formatting or manipulating data in Java, AngularJS filters can be thought of as the equivalent of methods you’d use
- [Step 7-AngularJS Service (For Java Developers)](https://corejava25hours.com/angularjs-service/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play In AngularJS, services are special JavaScript objects that provide reusable functionality across different parts of an AngularJS application. They help in sharing code and data between components like controllers, directives, and filters. Think of AngularJS services as similar to utility
- [Step 8-AngularJS Event (For Java Developers)](https://corejava25hours.com/angularjs-event/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play In AngularJS, events like mouse clicks, key presses, and form submissions can be handled using directives. Directives are special attributes that you can add to HTML elements to bind specific behavior to them. This is somewhat similar to handling events
- [AngularJS - Step 9: Routing (For Java Developers)](https://corejava25hours.com/angularjs-step-9-routing/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Routing in AngularJS enables you to create Single Page Applications (SPAs) where users can navigate between different "pages" without refreshing the whole page. This functionality is achieved through the ngRoute module, which handles the routing mechanism. Java Comparison: In Java
- [AngularJS - Step 10: Factories (For Java Developers)](https://corejava25hours.com/angularjs-step-10-factories/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play In AngularJS, a Factory is a tool for creating and sharing reusable code across different parts of your application. Think of it as a way to produce objects, functions, or values that can be used by various components like controllers
- [AngularJS - Step 11: Custom Directives (For Java Developers)](https://corejava25hours.com/angularjs-step-11-custom-directives/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Custom directives in AngularJS are powerful tools that let you extend HTML and create reusable components with custom behaviors. If you’re familiar with Java and want to understand AngularJS directives, think of them as custom tags or components in HTML
- [AngularJS - Step 12: Promises (For Java Developers)](https://corejava25hours.com/angularjs-step-12-promises/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Promises in AngularJS are a way to handle asynchronous operations, such as making HTTP requests, in a cleaner and more manageable way. If you’re familiar with Java, think of Promises as a way to handle tasks that don’t complete immediately,
- [AngularJS - Step 13: Animations (For Java Developers)](https://corejava25hours.com/angularjs-step-13-animations/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Animations can make your web applications feel more dynamic and engaging. AngularJS provides a straightforward way to add animations using the ngAnimate module. For those familiar with Java, think of AngularJS animations as similar to using animation frameworks or libraries
- [AngularJS - Step 14: Providers and Configuration (For Java Developers)](https://corejava25hours.com/angularjs-step-14-providers-and-configuration/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play AngularJS Providers and Configuration: A Guide for Java Developers In AngularJS, providers and configuration are key to setting up and managing services in your application. For Java developers, think of providers and configuration as similar to setting up beans or
- [AngularJS - Step 15: Testing (For Java Developers)](https://corejava25hours.com/angularjs-step-15-testing/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Testing is a crucial part of software development, and AngularJS offers tools to make it easier. As a Java developer, you’re likely familiar with JUnit for unit testing and might have heard of tools like Selenium for end-to-end testing. In
- [AngularJS: Interview Questions](https://corejava25hours.com/angularjs-interview-questions/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Question 1: What is AngularJS? Answer: AngularJS is a JavaScript framework used for building dynamic single-page web applications. Question 2: What is two-way binding in AngularJS? Answer: Two-way binding is a feature of AngularJS that allows the synchronization of data
- [AngularJS - Step 16: Deployment and Hosting (For Java Developers)](https://corejava25hours.com/angularjs-step-16-deployment-and-hosting/) - Play Store Application link – Java to AngularJS in 16 Steps - App on Google Play Once you've developed your AngularJS application, it’s time to deploy it and make it available to users. This step is similar to deploying a Java web application, where you would typically deploy a WAR file to a server. Here, we’ll
- [JavaScript: Interview Questions/Answers](https://corejava25hours.com/javascript-interview-questions-answers/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Question 1 - What is JavaScript? Answer - JavaScript is a programming language that is commonly used to create interactive effects within web browsers. It is a high-level, dynamic, and interpreted language that is designed to be used with HTML
- [JavaScript: Step 13- ES6+ Features (Arrow functions, Template literals, Destructuring, Spread operator)](https://corejava25hours.com/javascript-step-13-es6-features-arrow-functions-template-literals-destructuring-spread-operator/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play ES6 (ECMAScript 2015) introduced several powerful features to JavaScript, making code more concise and expressive. Key features include arrow functions, template literals, destructuring, and the spread operator. Comparison to Java: Arrow Functions: In Java, you can achieve similar functionality using
- [JavaScript: Step 12- Browser Storage (localStorage/sessionStorage)](https://corejava25hours.com/javascript-step-12-browser-storage-localstorage-sessionstorage/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Browser storage allows web browsers to store data locally on the user's device, providing two primary types: localStorage and sessionStorage. Comparing to Core Java: Core Java Comparison: Core Java does not have a direct equivalent of localStorage or sessionStorage, but
- [JavaScript: Step 11- Regular Expressions](https://corejava25hours.com/javascript-step-11-regular-expressions/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Regular expressions (regex or regexp) are patterns used to match combinations of characters within strings. They are particularly useful for search and replace operations. In JavaScript, regular expressions are objects that can be created using either the literal notation or
- [JavaScript: Step 10- AJAX and APIs](https://corejava25hours.com/javascript-step-10-ajax-and-apis/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play AJAX (Asynchronous JavaScript and XML) is a technique that allows you to send and receive data from a web server without refreshing the entire page. This makes web pages more dynamic and interactive by enabling background data loading and updates
- [JavaScript: Step 9- DOM manipulation and events](https://corejava25hours.com/javascript-step-9-dom-manipulation-and-events/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play DOM (Document Object Model) is a programming interface for HTML and XML documents. It represents the page so that programs can change the document structure, style, and content. JavaScript can access and modify the DOM of a page using the
- [JavaScript: Step 8- Error handling and debugging](https://corejava25hours.com/javascript-step-8-error-handling-and-debugging/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play In JavaScript, handling errors and debugging code are essential for creating reliable applications. If you're familiar with Java, you'll find that many concepts in JavaScript have parallels in Java, but with some key differences. Let's explore how JavaScript handles errors
- [JavaScript: Step 7- Promises and Async/Await](https://corejava25hours.com/javascript-step-7-promises-and-async-await/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play When dealing with tasks that take some time to complete, such as fetching data from a server or reading a file, JavaScript uses Promises and Async/Await to handle these asynchronous operations. These features allow you to write code that handles
- [JavaScript: Step 6- Classes and Inheritance](https://corejava25hours.com/javascript-step-6-classes-and-inheritance/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Classes and inheritance are fundamental concepts in object-oriented programming, allowing you to create reusable code and manage complex systems. JavaScript introduced classes in ECMAScript 2015 (ES6), which provide a structured way to define objects with properties and methods. 1. Classes
- [JavaScript: Step 5- Arrays and Objects](https://corejava25hours.com/javascript-step-5-arrays-and-objects/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Arrays and Objects are fundamental data structures in JavaScript, helping you organize and manage data efficiently. Here’s a look at each of them: 1. Arrays An array is like a list of items. Each item in the list is stored
- [JavaScript: Step 4- Functions and Scopes](https://corejava25hours.com/javascript-step-4-functions-and-scopes/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Functions in JavaScript are like small machines that perform specific tasks. You can call these machines (functions) multiple times and they can use inputs (parameters) and produce outputs (return values). Scopes define where you can access certain variables in your
- [JavaScript: Step 3- Control flow statements (if/else, switch/case, loops)](https://corejava25hours.com/javascript-step-3-control-flow-statements-if-else-switch-case-loops/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play Control flow statements help determine the order in which different parts of your code run. In JavaScript, you have if/else statements, switch/case statements, and various types of loops. They work similarly to Java’s control flow constructs. 1. If/Else Statements These
- [JavaScript: Step 2 - Operators for Java Developers](https://corejava25hours.com/javascript-step-2-operators/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play In JavaScript, operators perform operations on variables and values, just like in Java. Let’s explore the different types of operators: 1. Arithmetic Operators These operators are used for mathematical operations. They work similarly to Java’s arithmetic operators. Addition (+): Adds
- [JavaScript: Step 1 - Data Types and Variables - for Java Developers](https://corejava25hours.com/javascript-step-1-data-types-and-variables/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play In programming, data types define what kind of data a variable can hold. Think of a variable as a box that stores values. Data Types in JavaScript Here’s a quick overview of JavaScript data types with Java comparisons: String: Similar
- [Setup an IDE for JavaScript](https://corejava25hours.com/setup-an-ide-for-javascript/) - Play Store Application link – Java to JavaScript in 13 Steps - App on Google Play 1. Install a Text Editor or IDE:Just like in Java where you need an IDE like IntelliJ IDEA or Eclipse, JavaScript also needs an editor. Here are a few popular ones: Visual Studio Code (VS Code): Download here (Recommended) Think
- [Topic 17 - Python Deployment: From Code to Cloud](https://corejava25hours.com/step-17-python-deployment-from-code-to-cloud/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github Project link - https://github.com/kuldeep101990/Python_step17 In this blog post, we'll look at how to deploy Python applications, focusing on packaging Python scripts, using Docker for deployment (with a comparison to Java). This post is designed for developers who are already
- [Topic 16 - 3 points of Python Best Practices](https://corejava25hours.com/step-16-python-best-practices-a-developers-guide/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step16 As developers transitioning from Java to Python, you might be familiar with the importance of writing clean, maintainable, and efficient code. Python is known for its simplicity and readability, but just like any language, following
- [Topic 15 - 4 points about Python Data Science and Machine Learning](https://corejava25hours.com/step-15-python-for-data-science-and-machine-learning-a-guide-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step15 As a Java developer, you are already familiar with the power of programming. However, when it comes to data science and machine learning (ML), the landscape is a bit different. Python has become the go-to
- [Topic 14- 3 steps of Unit Testing in Python](https://corejava25hours.com/step-14-a-developers-guide-to-testing-in-python/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step14 Testing is an essential part of any software development process. If you're coming from a Java background, you're already familiar with the importance of unit testing (through JUnit) and how it helps you maintain code
- [Topic 13: 4 steps of Python Database Connectivity](https://corejava25hours.com/step-13-python-database-connectivity-a-java-developers-guide/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step13 As a Java developer, you're probably familiar with JDBC (Java Database Connectivity), which allows Java applications to interact with databases. In Python, there are a number of ways to connect to and manipulate databases, and
- [Topic 12 - 4 steps for Python Web Development](https://corejava25hours.com/step-12-python-for-web-development-a-java-developers-guide/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step12 As a Java developer, you’re likely familiar with the intricacies of frameworks like Spring Boot for building web applications. Python, being a versatile and easy-to-learn language, offers several frameworks that make web development just as
- [Topic 11- Working with 4 Python Libraries](https://corejava25hours.com/step-11-working-with-python-libraries-a-java-developers-guide/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step11 In Python, libraries are essential for streamlining development, providing a vast range of tools for different tasks. If you're a Java developer, you’re probably familiar with how Java provides libraries like Apache Commons or Java’s
- [Topic 10:- 5 Advanced Python Concepts](https://corejava25hours.com/step-10-advanced-python-concepts-a-java-developers-guide/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step10 If you already have a good grasp of Java, diving into Python’s advanced features can be a refreshing experience. Python offers many powerful features that simplify code and make it more readable. In this blog
- [Topic 9 - Error and Exception Handling in Python](https://corejava25hours.com/step-9-error-and-exception-handling-in-python-a-comparison-with-java/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step9 In the world of programming, errors are inevitable. They happen for a variety of reasons like incorrect input, network failures, or resource unavailability. The key to writing resilient applications is understanding how to handle errors.
- [Topic 8- File Handling in Python](https://corejava25hours.com/step-8-file-handling-in-python-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step8 File handling is a fundamental part of programming. It allows you to read, write, and manipulate files. If you’ve worked with FileReader, BufferedReader, or FileWriter in Java, Python’s file handling will feel familiar yet simpler
- [Topic 7 - Modules and Packages in Python](https://corejava25hours.com/step-7-modules-and-packages-in-python-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step7 Modules and packages are fundamental for structuring and organizing code in Python. If you’re familiar with Java packages, you’ll find many similarities, with Python’s approach being more dynamic and flexible. Importing Modules (import vs. Java
- [Topic 6- Object-Oriented Programming (OOP) in Python](https://corejava25hours.com/step-6-object-oriented-programming-oop-in-python-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step6 Object-Oriented Programming (OOP) is a paradigm many Java developers are familiar with. Python’s OOP concepts align closely with Java’s, but Python simplifies syntax and introduces unique features like dynamic typing and duck typing. Classes and
- [Topic 5 - 5 Types of Python Data Structures](https://corejava25hours.com/step-5-python-data-structures-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step5 Data structures are essential for managing and organizing data efficiently in programming. Python offers built-in data structures like lists, tuples, sets, dictionaries, and strings. If you’re coming from Java, understanding these structures with their comparisons
- [Topic 4- Python Functions](https://corejava25hours.com/step-4-python-functions-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step4 Functions in Python are powerful tools that simplify code reuse and organization. If you are familiar with Java methods, learning Python functions will feel intuitive, yet you’ll find them more flexible. Let’s explore Python functions
- [Topic 3 - Python Control Structures (If-else, For/while loops, break/continue/pass)](https://corejava25hours.com/step-3-python-control-structures-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step3 Control structures are essential for directing the flow of a program. If you’re familiar with Java, you’ll find Python’s control structures to be simpler and more intuitive. Let’s dive in. If-else in Python vs. Java
- [Topic 1:- 2 steps of Introduction and Setup of Python](https://corejava25hours.com/step-1-introduction-to-python/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github Project lInk - https://github.com/kuldeep101990/Python_step1 1. Introduction What is Python? Python is a high-level, interpreted programming language known for its simplicity and readability. Unlike Java, Python focuses on reducing boilerplate code, allowing you to write less and achieve more. It
- [Topic 2- Python Syntax and Basics (Variable/Data types/comments etc)](https://corejava25hours.com/step-2-python-syntax-and-basics-for-java-developers/) - Play Store Application link – Java to Python in 17 Steps - App on Google Play Github project link - https://github.com/kuldeep101990/Python_step2 Learning Python as a Java developer is like moving from a manual transmission car (Java) to an automatic one (Python). The core concepts remain similar, but the effort required reduces significantly. Let’s break it down
- [Bonus: Spring Framework to Spring Boot](https://corejava25hours.com/bonus-spring-framework-to-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Spring Framework has long been the foundation for Java enterprise applications, offering tools like Dependency Injection, AOP, and MVC. With Spring Boot, development is faster and easier, thanks to auto-configuration, an embedded server, and simplified setup. This is about merging the
- [Topic 13: - 3 sections of Advanced Spring Boot Topics](https://corejava25hours.com/step-13-advanced-spring-boot-topics/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play In this guide, we will explore some advanced Spring Boot concepts: event handling, asynchronous processing, and scheduled tasks. Each topic will be presented with practical code examples to help you implement these features in your Spring Boot applications. Github project link
- [Topic 12: - 6 steps of Spring Boot WebSocket](https://corejava25hours.com/step-12-spring-boot-websockets/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play This guide focuses on using WebSockets in Spring Boot for real-time communication, including setting up WebSocket endpoints, creating a simple chat application, and integrating WebSockets with STOMP for message broadcasting. Github project link - https://github.com/kuldeep101990/Spring-Boot-WebSockets Step 1: Setting Up a Spring
- [Topic 11: - 3 steps of Spring Boot Deployment (Bonus - Docker and Kubernetes deployments)](https://corejava25hours.com/step-11-spring-boot-deployment/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Step 1: Setting Up a Spring Boot Project Using Spring Initializr Visit https://start.spring.io/. Configure the project: Project: Maven Language: Java Spring Boot Version: 3.x.x Dependencies: Spring Web, Spring Boot DevTools Click Generate to download the project ZIP and extract it. Import
- [Topic 10: - 5 steps of Spring Boot Logging](https://corejava25hours.com/step-10-spring-boot-logging/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Spring-Boot-Logging Step 1: Setting Up a Spring Boot Project Using Spring Initializr Visit https://start.spring.io/. Configure the project: Project: Maven Language: Java Spring Boot Version: 3.x.x Dependencies: Spring Web, Spring Boot DevTools, Spring Boot Logging Click Generate to
- [Topic 9: - 5 steps of Caching in Spring Boot](https://corejava25hours.com/step-9-caching-in-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Caching-in-Spring-Boot Step 1: Setting Up a Spring Boot Project Using Spring Initializr Visit https://start.spring.io/. Configure the project: Project: Maven Language: Java Spring Boot Version: 3.x.x Dependencies: Spring Web, Spring Cache, Spring Boot DevTools Click Generate to download
- [Topic 8: - 4 steps of Building Microservices with Spring Boot](https://corejava25hours.com/step-8-building-microservices-with-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Step 1: Setting Up Microservices Create Service Projects Using Spring Initializr Github project link (Order service ) - https://github.com/kuldeep101990/Building-Microservices-with-Spring-Boot-Order Github project link (Project service ) - https://github.com/kuldeep101990/Building-Microservices-with-Spring-Boot-Product Go to https://start.spring.io/. Create the following projects: Service 1: Product Service Dependencies: Spring Web,
- [Topic 7: - 5 steps of Spring Boot Testing](https://corejava25hours.com/step-7-spring-boot-testing/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Spring-Boot-Testing Step 1: Setting Up a Spring Boot Project Using Spring Initializr Go to https://start.spring.io/. Fill in the details: Project: Maven Language: Java Spring Boot: 3.x.x Dependencies: Spring Web, Spring Boot Starter Test Click Generate, and extract
- [Topic 6: - 5 steps of Spring Boot Security](https://corejava25hours.com/step-6-spring-boot-security/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Spring-Boot-Security Step 1: Setting Up a Spring Boot Project Using Spring Initializr Go to https://start.spring.io/. Fill in the details: Project: Maven Language: Java Spring Boot: 3.x.x Dependencies: Spring Web, Spring Security Click Generate, and extract the downloaded
- [Topic 5: - 6 steps of Spring Boot Actuator](https://corejava25hours.com/step-5-spring-boot-actuator/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Spring_Boot_Actuator Step 1: Setting Up a Spring Boot Project Using Spring Initializr Go to https://start.spring.io/. Fill in the details: Project: Maven Language: Java Spring Boot: 3.x.x Dependencies: Spring Web, Spring Boot Actuator Click Generate, and extract the
- [Topic 4: - 5 steps of Profiles and Environment Management in Spring Boot](https://corejava25hours.com/step-4-profiles-and-environment-management-in-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github project link - https://github.com/kuldeep101990/Profiles_and_Environment_Management Step 1: Setting Up a Spring Boot Project Using Spring Initializr Go to https://start.spring.io/. Fill in the details: Project: Maven Language: Java Spring Boot: 3.x.x Dependencies: Spring Web Click Generate, and extract the downloaded ZIP file.
- [Topic 3: - 6 steps about Spring Boot Starters](https://corejava25hours.com/step-3-spring-boot-starters/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Spring Boot makes application development faster and easier by abstracting complex configurations. One of its key features is Spring Boot Starters, which simplify dependency management and reduce boilerplate code. In this post, we'll explore the concept of starters, their role in
- [Topic 2: - 5 steps of Auto-Configuration in Spring Boot](https://corejava25hours.com/step-2-auto-configuration-in-spring-boot/) - Play Store Application link – Spring Boot in 13 steps - App on Google Play Github Project link - https://github.com/kuldeep101990/AutoConfiguration_in_Spring_Boot Step 1: Setting Up a Spring Boot Project Using Spring Initializr Go to https://start.spring.io/. Fill in the details: Project: Maven Language: Java Spring Boot: 3.x.x Dependencies: Spring Web, Spring Data JPA, H2 Database Click Generate, and
- [Topic 0- 6 steps to Setup Spring Framework in IDE and 2 ways to write 'Hello World' program.](https://corejava25hours.com/step-0-setup-and-configure-spring-framework-in-ide/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Ways to setup Spring in IDE- Sure, here's a more detailed comparison with URLs for each IDE: As we can see, from above ways to setup spring framework, Maven is recommended and preferred.So we will use Maven to setup spring in
- [Spring Framework: Interview Questions and Answers](https://corejava25hours.com/spring-framework-interview-questions-and-answers/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play What is Spring Framework? Answer: Spring Framework is an open-source Java-based framework that provides a comprehensive programming and configuration model for modern Java-based enterprise applications. What are the key features of Spring Framework? Answer: The key features of Spring Framework are
- [Topic 9 - MVC Framework Module](https://corejava25hours.com/step-8-mvc-framework-module/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play The Spring MVC framework helps build web applications using the Model-View-Controller (MVC) pattern, which separates an application into three parts: Model: Represents the application's data and business logic. View: Renders data for the user (e.g., web pages). Controller: Handles user input
- [Topic 8:- 4 key features of Web module](https://corejava25hours.com/step-7-web-module/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play The Spring Web module makes building web applications easier by handling common web development tasks such as handling HTTP requests, session management, and security. Key Features of the Web Module: HTTP request handling: Easily handle HTTP requests, parameters, headers, and cookies.
- [Topic 7:- ORM integration (JPA - Hibernate)](https://corejava25hours.com/step-6-o-r-mapping-integration/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play The Spring Framework makes it easier to integrate Object-Relational Mapping (ORM) tools like JPA (Java Persistence API) and Hibernate for handling database operations in Java applications. This eliminates the need for writing traditional SQL queries, allowing you to interact with databases
- [Topic 6 - JDBC Abstraction and DAO](https://corejava25hours.com/step-5-jdbc-abstraction-and-dao/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Github Project Link - (XML based) - https://github.com/kuldeep101990/SpringJDBC Github Project Link - (Annotation based) - https://github.com/kuldeep101990/SpringJDBCAnnotation To make it easier for developers to work with databases, Spring provides an abstraction layer on top of JDBC called the JDBC Template. This abstraction
- [Topic 5:- 5 concept of AOP and 5 types of Advices in AOP](https://corejava25hours.com/step-4-aop-aspect-oriented-programming/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Understanding AOP (Aspect-Oriented Programming) in Spring Github project link (Xml based) - https://github.com/kuldeep101990/SpringAOPXml Github project link (Annotation based) - https://github.com/kuldeep101990/SpringAOPAnnotation 1- Aspect An Aspect is a class that defines common behaviors (advices) to be applied at specific points (join points) in
- [Topic 4:- IOC (Inversion of Control) & 4 Types of Autowirings](https://corejava25hours.com/step-3-ioc-inversion-of-control/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Understanding Inversion of Control (IoC) in Spring IoC is a design principle where the control of creating objects is transferred from the application code to a configuration file (either XML or annotations). This helps to decouple the code and manage dependencies
- [Topic 3:- 7 Spring Modules](https://corejava25hours.com/step-2-spring-modules/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Spring Modules - Spring has 7 modules- 1- Core Container (Bean Factory)/ Application Context - [Comparsion between Core Container and Application Context modules]- A- Core Container Module - It's original and old ways and it uses BeanFactory class and provides basic
- [Topic 2:- Spring Bean (3 parts, 5 types of scope and 12 steps of lifecycle, 2 callback methods)](https://corejava25hours.com/step-3-spring-bean/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play All the objects of application, which are managed by IOC containers are called beans. Spring bean contains 3 things- 1- Instantiation - creation of an object of a class (bean) by the Spring IoC (Inversion of Control) container. 2-Life cycle details -
- [Topic 1:- 4 point of Spring definition](https://corejava25hours.com/step-1-spring-definition/) - Play Store Application link – Spring Framework in 9 steps - Apps on Google Play Definition - spring is a -open source, -java application development framework. -It has layered architecture; we can use what we need and leave what we don’t need. -2 core principles of spring framework- IOC and AOP. Detailed explanation of each line
- [Hibernate: Interview Questions and Answers](https://corejava25hours.com/hibernate-interview-questions-and-answers/) - Play Store Application link – Hibernate - in 10 steps - Apps on Google Play What is Hibernate? Hibernate is an open-source Object-Relational Mapping (ORM) framework that simplifies database operations in Java applications. What are the benefits of using Hibernate? Hibernate eliminates the need for boilerplate JDBC code, improves performance, supports caching, and provides a consistent
- [Topic 10- Caching in hibernate](https://corejava25hours.com/5-caching-in-hibernate/) - Cache definition- Cache is a temporary data which is used to speed up the performance. Types of caching in hibernate- In the table above: Caching Level : The level of caching, whether it's first-level, second-level, or query cache. Default On : Whether the cache is enabled by default or not. Session-Specific : Whether the cache
- [Topic 9 - Criteria Queries](https://corejava25hours.com/criteria-queries/) - The Criteria API in Hibernate provides a programmatic way to construct queries for retrieving entities from the database. Instead of writing HQL or SQL queries as strings, you can use a fluent API to build queries using Java method calls. Here are some of the benefits of using the Criteria API: Type safety: You can
- [Topic 8 - Hibernate Query Language (HQL)](https://corejava25hours.com/step-5-hibernate-query-language-hql/) - Definition - Hibernate Query Language (HQL) is used to perform database operations on objects. HQL allows you to perform SQL-like queries on your objects, and provides a way to navigate through object graphs using object-oriented syntax. A- Performing database operations using HQL: - To perform database operations using HQL, you must first create a Hibernate
- [Topic 7- Types of Mapping in Hibernate](https://corejava25hours.com/6-mapping-in-hibernate/) - Mapping meaning in hibernate- Connection between java class to database tables Types of mapping in hibernate- There are 3 types of mapping in hibernate for classes. 1- Inheritance Mappings- A- Table per class hierarchy (Single Table Strategy) - B- Table per sub-class hierarchy (Joined Strategy)- C- Table per concrete class hierarchy-2- Collections Mappings- A- List
- [Topic 6 - 10 Methods of hibernate](https://corejava25hours.com/step-5-10-methods-used-in-hibernate/) - 1- get() method 2- load() method, 3- save() method 4- saveOrUpdate() method 5- update() method 6- persist() method 7- merge() method 8- delete() method 9- evict() method 10- clear() method We are going to create single simple program to demonstrate all them, one by one. First, we will configure everything which will be needed- 1-
- [Topic 5- Working with Persistent Objects](https://corejava25hours.com/step-4-working-with-persistent-objects/) - Github project link (XML version) - https://github.com/kuldeep101990/HibernateSimpleCrud Github project link (Annotation version)- https://github.com/kuldeep101990/HibernateSimpleCrudAnnotated Here we are going to perform following operations- Saving objects Retrieving objects Updating objects Deleting objects First, we will configure everything which will be needed- 1- Class (which need to be saved/updated/deleted and retrieved.2- Hibernate Configuration file3- Hibernate Mapping File4- Create the
- [Topic 4- 3 States of objects in hibernate and Generators](https://corejava25hours.com/4-states-of-objects-in-hibernate/) - Hibernate object states- Generators - Hibernate XML vs. Annotation-Based Generators – Common Strategies
- [Topic 3- Hibernate Mapping Files Setup](https://corejava25hours.com/hibernate-mapping-files/) - Important - Table - Java : Hibernate : sql datatypes mapping comparison of the data types for Java, Hibernate, and SQL: Now we have following two steps to use all the configuration which we have performed- Step 1- Defining Mapping files - (Java class to tables conversion)Step 2- Creating Session factory, session and transaction objects
- [Topic 2 - Configuring Hibernate Configuration File](https://corejava25hours.com/step-2-configuring-hibernate/) - Configuring Hibernate is the process of setting up the framework to connect to a database, define mapping files and specify the persistent objects that will be used in the application. There are following steps to perform-1- Importing Hibernate libraries (Classes/Interfaces)2- Creating Hibernate Configuration File Step 1- Add Hibernate libraries to your project Libraries can be
- [Topic 1-Introduction to Hibernate and ORM (Object-Relational Mapping)](https://corejava25hours.com/2-hibernate-definition/) - Introduction to Hibernate and ORM Hibernate is an Object-Relational Mapping (ORM) framework for mapping Java objects to relational database tables. ORM is a technique for mapping objects in an object-oriented programming language to relational databases. Why Use Hibernate? Open-source framework Provides a high-level API for common database operations Supports lazy loading, making it more efficient
- [Topic 0-Hibernate Syllabus](https://corejava25hours.com/hibernate-syllabus/) - Play Store Application link – Hibernate - in 10 steps - Apps on Google Play Topic 1-Introduction to Hibernate and ORM (Object-Relational Mapping)A- Introduction to Hibernate and ORMB- Why Use Hibernate?C- How Hibernate Works?D- Hibernate Architecture Topic 2 – Configuring HibernateA- Importing Hibernate libraries (Classes/Interfaces)B- Hibernate Interfaces/ClassC- Creating Hibernate Configuration File Topic 3- Hibernate Mapping Files
- [Spring Boot - Docker Deployment](https://corejava25hours.com/spring-boot-docker-deployment/) - Let's get started with Docker by building a simple Spring Boot project using Spring Initializer and Dockerizing it step by step. Github Project link - https://github.com/kuldeep101990/Spring-docker-demo Step 1: Create a Spring Boot Project Go to Spring Initializer. Configure the project: Project: Maven Language: Java Spring Boot Version: Latest stable version Dependencies: Add Spring Web and
- [Spring boot - Kubernetes deployment](https://corejava25hours.com/spring-boot-kubernetes/) - Github Project Link - https://github.com/kuldeep101990/Spring-kubernates-demo Generate Spring Boot App using Spring Initializer: Go to Spring Initializr Set the project properties, add dependencies (e.g., Spring Web, Spring Boot DevTools). Download the generated .zip file. Extract the .zip file. Navigate to the extracted folder: cd path_to_your_project Build the Project using Maven: mvn clean install Create Dockerfile: In
- [Spring boot -Elastic Search - Setup and CRUD](https://corejava25hours.com/elastic-search-setup-and-crud/) - Step 1: Understanding Elasticsearch What is Elasticsearch?Elasticsearch is a distributed, RESTful search and analytics engine capable of handling large volumes of data in near real-time. It's commonly used for search functionality, log analysis, and data visualization. Core Concepts: Index: Like a database in RDBMS. It stores related documents. Document: A single unit of data, stored
- [9 (C)- LLM benchmarks and leaderboards](https://corejava25hours.com/9-c-llm-benchmarks-and-leaderboards/) - Benchmarking and leaderboards play a crucial role in assessing the performance and progress of Large Language Models (LLMs). This tutorial explores how benchmarks are established and used in the context of LLMs. 1. Introduction to LLM Benchmarks LLM benchmarks are standardized tasks and datasets used to evaluate the performance of language models across various NLP
- [9 (B)- Human evaluation and user studies](https://corejava25hours.com/9-b-human-evaluation-and-user-studies/) - Human evaluation and user studies are essential components of evaluating natural language processing (NLP) models. While automatic metrics like BLEU, ROUGE, and METEOR provide quantifiable insights, human evaluation captures the nuances of language and user experience. 1. Introduction to Human Evaluation Human evaluation involves using human judges to assess the quality and performance of NLP
- [9 (A)- Automatic evaluation metrics (BLEU, ROUGE, METEOR)](https://corejava25hours.com/9-a-automatic-evaluation-metrics-bleu-rouge-meteor/) - Automatic evaluation metrics are essential for evaluating the performance of natural language processing (NLP) models. This tutorial covers three popular metrics: BLEU, ROUGE, and METEOR. 1. Introduction to Evaluation Metrics BLEU (Bilingual Evaluation Understudy): Measures how closely a machine-generated text matches a set of reference texts. ROUGE (Recall-Oriented Understudy for Gisting Evaluation): Focuses on recall
- [8 (C)- AI governance and ethical frameworks](https://corejava25hours.com/8-c-ai-governance-and-ethical-frameworks/) - AI governance and ethical frameworks are crucial for ensuring that AI technologies are developed and used responsibly. This tutorial explores the principles, practices, and tools for establishing effective AI governance and ethical frameworks. 1. Introduction to AI Governance and Ethical Frameworks AI Governance: The framework of policies, standards, and practices that guide the responsible development
- [8 (B)- Privacy and security considerations](https://corejava25hours.com/8-b-privacy-and-security-considerations/) - Privacy and security are crucial aspects when developing and deploying Large Language Models (LLMs). This tutorial explores how to ensure that LLMs respect user privacy and maintain security. 1. Introduction to Privacy and Security in LLMs Privacy: Protecting user data from unauthorized access and misuse. Security: Ensuring that AI systems are robust against attacks and
- [8 (A)- Bias and fairness in LLMs](https://corejava25hours.com/8-a-bias-and-fairness-in-llms/) - Bias and fairness are critical considerations when developing and deploying Large Language Models (LLMs). This tutorial explores how to identify, understand, and mitigate bias in LLMs to ensure fair and responsible AI use. 1. Introduction to Bias and Fairness in LLMs Bias: Systematic and unfair discrimination against certain individuals or groups based on attributes such
- [7 (E)- Code generation and programming assistance](https://corejava25hours.com/7-e-code-generation-and-programming-assistance/) - Code generation and programming assistance are powerful applications of Large Language Models (LLMs). This tutorial covers how to use LLMs for generating code and assisting with programming tasks using the Hugging Face transformers library. 1. Introduction to Code Generation and Programming Assistance Code Generation: Automatically generating code snippets, functions, or entire programs based on a
- [7 (D)- Content creation and creative writing](https://corejava25hours.com/7-d-content-creation-and-creative-writing/) - Content creation and creative writing are exciting applications of Large Language Models (LLMs). This tutorial covers how to use LLMs for generating creative content, such as stories, articles, and poetry, using the Hugging Face transformers library. 1. Introduction to Content Creation and Creative Writing Content Creation: Generating various types of content, including articles, blog posts,
- [7 (C)- Question answering and information retrieval](https://corejava25hours.com/7-c-question-answering-and-information-retrieval/) - Question answering (QA) and information retrieval (IR) are essential applications of Large Language Models (LLMs). This tutorial covers how to implement QA and IR systems using the Hugging Face transformers library. 1. Introduction to Question Answering and Information Retrieval Question Answering (QA): Systems that answer questions posed by users based on a given context. Information
- [7 (B)- Text generation and summarization](https://corejava25hours.com/7-b-text-generation-and-summarization/) - Introduction to Text Generation and Summarization Text generation means creating text that makes sense based on a given starting point. Summarization means making a long text shorter while keeping the main ideas. We use Large Language Models (LLMs) like GPT-3, BERT, or T5 for these tasks. Setting Up the Environment We will use Python and
- [7 (A)- Chatbots and conversational AI](https://corejava25hours.com/7-a-chatbots-and-conversational-ai/) - Chatbots and conversational AI use Large Language Models (LLMs) to talk with users in natural language. This guide explains how to build a chatbot using an LLM, set up the environment, write the chatbot code, and deploy it. 1. Introduction to Chatbots and Conversational AI Chatbots are automated programs designed to talk with human users.
- [6 (C)- Load balancing and scaling LLM systems](https://corejava25hours.com/6-c-load-balancing-and-scaling-llm-systems/) - When you want to use Large Language Models (LLMs) in real-world applications, it is important to manage high traffic and maintain good performance. This guide explains how to balance the load and scale your system effectively, using simple language and detailed examples. 1. Load Balancing Load balancing means distributing incoming traffic across multiple servers so
- [6 (B)- Serving LLMs in production environments](https://corejava25hours.com/6-b-serving-llms-in-production-environments/) - Serving Large Language Models (LLMs) in production means making them ready to handle real-time user requests efficiently. This guide will explain the key steps, including setting up a server, optimizing for performance, and ensuring reliability, using simple language and detailed examples. 1. Setting Up a Server To use an LLM in production, you need to
- [6 (A)- Model compression and quantization](https://corejava25hours.com/6-a-model-compression-and-quantization/) - Model compression and quantization are ways to make Large Language Models (LLMs) smaller and faster, which is important for using them on mobile phones or in real-time applications. 1. Model Compression Model compression means reducing the size of the model by cutting down the number of parameters. This makes the model smaller and faster. Some
- [5 (C)- Prompt engineering and few-shot learning](https://corejava25hours.com/5-c-prompt-engineering-and-few-shot-learning/) - Prompt engineering and few-shot learning are advanced methods to improve how Large Language Models (LLMs) work without needing to retrain them extensively. These methods involve crafting effective inputs (prompts) and using a few examples to guide the model's responses. 1. Prompt Engineering Prompt engineering means designing inputs that make the model give the desired response.
- [5 (B)- Fine-tuning LLMs for specific tasks (text generation, summarization, question answering)](https://corejava25hours.com/5-b-fine-tuning-llms-for-specific-tasks-text-generation-summarization-question-answering/) - Fine-tuning Large Language Models (LLMs) makes them better for specific tasks like generating text, summarizing, and answering questions. Let's see how to do this with easy examples and code snippets. 1. Text Generation Text generation is creating meaningful text based on a given start. Fine-tuning models like GPT-2 or GPT-3 can help in generating human-like
- [5 (A)- Pre-training techniques (self-supervised learning, masked language modeling)](https://corejava25hours.com/5-a-pre-training-techniques-self-supervised-learning-masked-language-modeling/) - Pre-training techniques are very important for creating Large Language Models (LLMs). These techniques help models understand language by learning from large amounts of text data. We'll talk about two main techniques: self-supervised learning and masked language modeling. Let's understand them! 1. Self-Supervised Learning Self-supervised learning is a method where the model learns from the data
- [4 (C)- TensorFlow and PyTorch for LLMs](https://corejava25hours.com/4-c-tensorflow-and-pytorch-for-llms/) - TensorFlow and PyTorch are two popular open-source frameworks used for training and using language models (LLMs). Although they aren't designed specifically for LLMs, they provide the tools needed to create and work with these models. TensorFlow Example: import tensorflow as tf# Define the model architecturemodel = tf.keras.Sequential([ tf.keras.layers.Embedding(input_dim=vocab_size, output_dim=embedding_size), tf.keras.layers.LSTM(units=lstm_units, return_sequences=True), tf.keras.layers.LSTM(units=lstm_units), tf.keras.layers.Dense(units=vocab_size, activation='softmax')])# Compile
- [4 (B)- Anthropic's models and APIs](https://corejava25hours.com/4-b-anthropics-models-and-apis/) - Anthropic is a research company that focuses on creating safe and ethical artificial intelligence systems, especially large language models (LLMs) and other AI technologies. They provide both open-source models like LLaMA and proprietary models and APIs through their platform. One of their main offerings is the Claude API, which gives access to their conversational AI
- [4 (A)- Hugging Face Transformers](https://corejava25hours.com/4-a-hugging-face-transformers/) - 1. What is Hugging Face Transformers: Hugging Face Transformers is a powerful tool in Python, built on the Transformer architecture using PyTorch. It's mainly used for tasks involving Natural Language Processing (NLP). 2. Understanding the Transformers Module: The Transformers module is like the brain of the Transformers library. It handles a key process called sequence-to-sequence
- [3 (E)- LLaMA, Anthropic's models, and other open-source LLMs](https://corejava25hours.com/3-e-llama-anthropics-models-and-other-open-source-llms/) - 1. What is LLaMA and How It Works: LLaMA is a super-smart language model developed by Anthropic, a research company that focuses on building AI systems safely and ethically. It's designed to handle many tasks involving language, like writing, summarizing, answering questions, and even generating computer code. 2. Key Features of LLaMA: Unlike some other
- [3 (D)- GPT-3 and its variants (GPT-J, GPT-Neo)](https://corejava25hours.com/3-d-gpt-3-and-its-variants-gpt-j-gpt-neo/) - 1. What is GPT-3 and How It Works: GPT-3 is like a super-intelligent language model created by OpenAI in 2020. It's based on a technology called Transformers, which helps it understand and produce human-like text very effectively. Unlike earlier versions, GPT-3 is massive, with a whopping 175 billion parameters (think of them as tiny decision-making
- [3 (C)- T5 (Text-to-Text Transfer Transformer)](https://corejava25hours.com/3-c-t5-text-to-text-transfer-transformer/) - 1. What is T5 and How It Works: T5 is like a super-smart language model developed by Google in 2019. It uses a technology called Transformers, which helps it understand and process human language very effectively. Unlike other models, T5 is unique because it treats all tasks as text-to-text problems. This means both the input
- [3 (B)- Bidirectional Encoder Representations from Transformers (BERT)](https://corejava25hours.com/3-b-bidirectional-encoder-representations-from-transformers-bert/) - 1. What is BERT and How It Works: BERT is like a very smart language model developed by Google in 2018. It’s based on a technology called Transformers and is designed to understand and represent natural language very well. Unlike simpler models, BERT can look at words from both sides at once, which helps it
- [3 (A)- Generative Pre-trained Transformer (GPT)](https://corejava25hours.com/3-a-generative-pre-trained-transformer-gpt/) - 1. What is GPT and How It Works: GPT is like a super-smart language model created by OpenAI in 2018. It's based on a technology called Transformers and has been trained on a massive amount of text from the internet. This helps GPT understand human language and generate text that looks natural. 2. How GPT
- [2 (E)- Transformer Architecture](https://corejava25hours.com/2-e-transformer-architecture/) - 1. What is the Transformer and How It Works: The Transformer is a new kind of neural network designed by Google in 2017. It’s a big leap for NLP because it uses attention mechanisms to understand how words relate in sentences, without needing older techniques like RNNs or CNNs. 2. How Transformer Handles Words: Instead
- [2 (D)- Attention Mechanisms](https://corejava25hours.com/2-d-attention-mechanisms/) - 1. What are Attention Mechanisms and How They Work: Attention mechanisms in neural networks are like your ability to focus on important parts when reading a long article. Just like you pay more attention to key words or phrases to understand the main idea, these mechanisms help models focus on crucial parts of text data.
- [2 (C)- Convolutional Neural Networks for NLP](https://corejava25hours.com/c-convolutional-neural-networks-for-nlp/) - 1. What are CNNs and How They Work: Convolutional Neural Networks (CNNs) were first designed for tasks like recognizing objects in images. In NLP, they're used to understand text by focusing on local patterns, like specific phrases or combinations of words. Example: Text: "This movie was great!" Local Patterns: CNNs focus on phrases like "was
- [2 (B)- Recurrent Neural Networks (RNNs, LSTMs, GRUs)](https://corejava25hours.com/2-b-recurrent-neural-networks-rnns-lstms-grus/) - Recurrent Neural Networks (RNNs) for Sentiment Analysis Recurrent Neural Networks (RNNs) are designed to handle sequential data by maintaining a memory of previous inputs through recurrent connections. This makes them suitable for tasks like sentiment analysis, where understanding the entire sequence of words is crucial for accurate classification. Overview: Input Sequence: Each word or token
- [2 (A)- Feedforward Neural Networks](https://corejava25hours.com/2-a-feedforward-neural-networks/) - Feedforward Neural Networks for Sentiment Analysis Feedforward neural networks are a type of artificial neural network that learns to map input features to outputs through multiple layers of neurons. Here’s how it applies to sentiment analysis: Overview: Input Layer: Receives the text representation (e.g., bag-of-words or TF-IDF vectors) of the restaurant review. Each word or
- [1 (C) NLP tasks (sentiment analysis, named entity recognition, text classification)](https://corejava25hours.com/1-c-nlp-tasks-sentiment-analysis-named-entity-recognition-text-classification/) - 1. Sentiment Analysis What is Sentiment Analysis? Sentiment analysis determines whether a piece of text expresses positive, negative, or neutral sentiments. Example using scikit-learn: from sklearn.feature_extraction.text import CountVectorizer, TfidfVectorizerfrom sklearn.naive_bayes import MultinomialNB# Sample movie reviewsreviews = [ "This movie was amazing! I loved the storyline and the acting was superb.", "The movie was a complete
- [1 (B) - Feature extraction (bag-of-words, TF-IDF, word embeddings)](https://corejava25hours.com/1-b-feature-extraction-bag-of-words-tf-idf-word-embeddings/) - 1. Bag-of-Words (BoW) What is Bag-of-Words? Bag-of-Words is a way to represent text as a count of words, ignoring grammar and word order. Example using scikit-learn: from sklearn.feature_extraction.text import CountVectorizer# Sample textstexts = ["This is a sample text.", "This is another sample text."]# Create a bag-of-words vectorizervectorizer = CountVectorizer()# Fit and transform the textsbow_matrix =
- [1 (A)- Text preprocessing (tokenization, stemming, lemmatization)](https://corejava25hours.com/1-a-text-preprocessing-tokenization-stemming-lemmatization/) - 1. Tokenization What is Tokenization? Tokenization means breaking down a sentence or paragraph into smaller parts, like words or phrases. Example: import nltk# Sample texttext = "This is a sample sentence with playing children and small houses."# Tokenize the text into wordstokens = nltk.word_tokenize(text)print(tokens)Output:['This', 'is', 'a', 'sample', 'sentence', 'with', 'playing', 'children', 'and', 'small', 'houses', '.']
- [LLM (Large Language Model) - Topics](https://corejava25hours.com/llm-large-language-model-topics/) - 1- Natural Language Processing (NLP) Fundamentals A- Text preprocessing (tokenization, stemming, lemmatization)B- Feature extraction (bag-of-words, TF-IDF, word embeddings)C- NLP tasks (sentiment analysis, named entity recognition, text classification) 2- Deep Learning for NLP A- Feedforward Neural NetworksB- Recurrent Neural Networks (RNNs, LSTMs, GRUs)C- Convolutional Neural Networks for NLPD- Attention MechanismsE- Transformer Architecture 3- Large Language Model
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