1. Basic procedural programming:
- Variables, data types, statements and Assignment operator

- Operator IF-ELSE

- Loop oparators while/for

- Functions, Methods, Classes, Objects

- Blocks

- Other operators

2. More about Object Programming. 

- Levels of abstraction

- Inheritance

- Polymorfism

- Interfaces

- Packages 

- Methods - parameters and returned values, passing parameters - By Reference or By Value 

3. Recurtion 

4. Basic Library Classes

- Input output

- Concurrency

- Regular Expressions

- Collections