Don’t get overwhelmed, Java is only this much 🚀

1. *Variables*
- int
- double
- float
- boolean
- char
- String

2. *Data Types*
- Primitive: int, float, char, boolean, long, double, byte, short
- Reference: classes, arrays, interfaces

3. *Declaring Variables*
- Syntax: type variableName = value;

4. *Expressions*
- Arithmetic: +, -, *, /, %
- Logical: &&, ||,!
- Comparison: ==,!=, <, >, <=, >=

5. *Operators*
- Arithmetic
- Assignment (=, +=, -=, etc.)
- Increment/Decrement (++/--)
- Logical
- Bitwise

6. *Control Structures*
- if
- else if
- else
- switch-case
- break
- continue

7. *Loops*
- for
- while
- do-while
- for-each (arrays/collections)

8. *Methods (Functions)*
- Return types, void
- Parameters
- Method overloading
- Static methods

9. *Objects and Classes*
- Class declaration
- Object creation (new)
- Fields & methods
- Constructors

10. *Inheritance & Polymorphism*
- extends
- super
- Method overriding
- Interfaces (implements)
- Abstract classes

11. *Encapsulation*
- private, public, protected
- Getters & setters

12. *Abstraction*
- Abstract classes
- Interfaces

13. *Exception Handling*
- try
- catch
- finally
- throw
- throws

14. *Arrays & Collections*
- Arrays
- ArrayList
- LinkedList
- HashMap
- Set

15. *Generics*
- List<String>
- Map<Key, Value>

16. *Streams (Java 8+)*
- Stream API
- filter, map, collect

17. *Lambda Expressions*
- (params) -> expression

18. *File I/O*
- FileReader
- FileWriter
- BufferedReader
- Scanner

19. *Multithreading*
- Thread class
- Runnable interface
- synchronized
- wait/notify

20. *Static & Final*
- static variables/methods
- final class/method/variable

21. *Packages & Imports*
- package
- import

22. *JVM, JRE & JDK*
- JVM: runs code
- JRE: environment
- JDK: tools + JRE

23. *Annotations*
- @Override
- @Deprecated
- @FunctionalInterface

24. *Access Modifiers*
- public
- private
- protected
- default (package-private)

25. *Testing Frameworks*
- JUnit
- TestReact ❤️ for morere** 😊