Java Tutorial

Build reliable software with a language trusted across modern applications. Learn the foundations of Java and develop the skills to create structured, scalable, and maintainable solutions.

All Java lessons

30 lessons, in the order we recommend taking them.

Start with lesson 1
  1. 1Getting Started
  2. 2Java Basics
  3. 3Operators
  4. 4Input and Output
  5. 5Control Flow
  6. 6Functions (Methods)
  7. 7Strings
  8. 8Arrays
  9. 9OOP: Classes and Objects
  10. 10Encapsulation
  11. 11Inheritance
  12. 12Polymorphism
  13. 13Abstraction
  14. 14Special Keywords
  15. 15Nested and Inner Classes
  16. 16Exception Handling
  17. 17Generics
  18. 18Collections Framework
  19. 19Lambda Expressions
  20. 20Streams API
  21. 21Date and Time API
  22. 22Interfaces: Advanced
  23. 23Iterators and Iterable
  24. 24File Handling and I/O
  25. 25Multithreading
  26. 26Concurrency Utilities
  27. 27Memory Management and JVM
  28. 28Annotations and Reflection
  29. 29Modern Java Features
  30. 30Design Patterns in Java

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