💻Step 11:Nested Classes – 7th hour + code

💡Definition

-class inside another class is called as nested class.

💡1- static nested class –

It’s is static class which is defined inside another class.

💡static nested class can’t access instance variable directly

💡2- non static class(Inner classes)

💡2.1- member class
It’s is class which is defined inside another class.
💡member class can access instance variable directly.

💡2.2- Local class
💡It’s is class which is defined and used inside the method another class.

💡2.3- Anonymous class
💡It’s is nameless class which is defined inside body of constructor call.

code samples are here
1-Program to create static nested class ‘SmallStatic’ inside Outer class StaticInner and then create object of static nested class ‘SmallStatic’.

package innerClasses;

public class StaticInner { 
static class SmallStatic{ 
SmallStatic(){
System.out.println("i am from static class");
}
} 
public static void main(String[] args) { 
StaticInner.SmallStatic static1=new StaticInner.SmallStatic(); 
} 
}

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2- Program to create member class ‘SmallMember’ inside Outer class MemberOut and then create objec of member class ‘SmallMember’.

package innerClasses;
public class MemberOut { 
class SmallMember{ 
SmallMember(){
System.out.println("i am called");
}
} 
public static void main(String[] args) { 
MemberOut.SmallMember member=new MemberOut().new SmallMember(); 
} 
}

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3- Program to create Local class ‘SmMth’and create its object inside method ‘shw2’ of Outer class MethodLocOut.

package innerClasses;

public class MethodLocOut { 
void shw2(){ 
class SmMth{ 
SmMth(){
System.out.println("i am called"); 
}
} 
SmMth mth=new SmMth();
} 
public static void main(String[] args) { 
MethodLocOut mLI=new MethodLocOut(); 
mLI.shw2(); 
}
}

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4- Program to create Anonymous class with constructor of Outer class AnonCls.

package innerClasses;

public class AnonCls {
void show(){
System.out.println("hiui");
}

public static void main(String[] args) {
AnonymousClss clss=new AnonymousClss(){
void show(){
System.out.println("hiii");
}
};
clss.show();
}
}

Run this Program ▶️