1. Introduction
2. 1. Getting Started
3. 2. Development Environment
4. 3. LSP
7. 4. Java Core Concepts
8. 1. 4.1. Variables
   2. 4.2. Control Flow
   3. 4.3. Methods
   4. 4.4. Classes and Objects
   5. 4.5. Enums
   6. 4.6. Wrap-up
11. 5. Object-Oriented Programming
12. 1. 5.1. Inheritance
    2. 5.2. Interfaces
    3. 5.3. Abstract Classes
    4. 5.4. Packages
    5. 5.5. Wrap-up
15. 6. Advanced Java
16. 1. 6.1. Exceptions
    2. 6.2. Collections
    3. 6.3. Streams
    4. 6.4. Generics
    5. 6.5. File I/O
    6. 6.6. Threads
    7. 6.7. Wrap-up
19. Build Tools and Version Control
22. Useful Resources