If your goal is to be Java Teacher, refer Javatpoint, Tutorials Point etc 
but
If your goal is to get a developer job + learn practical development with less theory then WELCOME 🙂 
 
Java Developer must have skills(For Job)- 2021

1- Core Java (Click here to see all topics)

2- Advance Java (Servlet and JSP)

(Click here to see all topics)

3- One Database framework/ORM Tool – (Recommend- Hibernate)

4- One Java MVC framework- (Recommend- Spring)

5- One Javascript framework- (AngularJS/Angular framework)

6- Basic SQL Queries Knowledge

Idee Programmer android apps (Play Store and Un-official)

1- Hindi comic library – Click here to download

Aatankharta Nagraj Collection Set-1 (Hari Maut, Jahreela Barood, Mamber, Numero Uno, Operation Surgery, Mission Critical) | Raj Comics

2- Java in 25 hours – Click here to download

3- Unhide it pro – Click here to download

4- Rashifal (hindi) : आज का राशिफल 2021 – Click here to download

5- Chacha chaudhary and Billoo : comic app – Click here to download

6- Parity, Sapre, Bcone , Emerd for All Apps (Doris, InOrbit, Diamond, RXCE etc) – Click here to download

7- Government Schemes 2021 : In hindi – Click here to download

8- Desire : Aap Kya banna chahte hain ? आप क्या बनना चाहते हैं ? – Click here to download

9- Homemade Beauty tips : घरेलु ब्यूटी टिप्स – Click here to download