Java Basics – Syntax, Data Types, Control Flow, OOP

📌 1. Java Syntax & Structure

• Introduction to Java and the JDK/JRE

• Writing your first Java program: HelloWorld.java

• Java program structure: class, main() method

• Comments in Java (single-line, multi-line, documentation)

• Compilation and execution of Java programs

✅ Hands-On: Write and run your first “Hello World” program

📌 2. Data Types & Variables

• Primitive Data Types: int, float, char, boolean, etc.

• Non-primitive Data Types: String, Arrays, Classes, etc.

• Type casting and type conversion

• Variables: declaration, initialization, scope

• Constants using final keyword

📌 3. Operators & Expressions

• Arithmetic operators (+, -, *, /, %)

• Relational operators (==, !=, <, >)

• Logical operators (&&, ||, !)

• Assignment & Compound Assignment (=, +=, -=)

• Unary and Increment/Decrement (++, --)

• Operator precedence

📌 4. Control Flow Statements

• Decision-Making:

  • if, if-else, nested if, switch-case

• Loops:

  • for, while, do-while

• Jump Statements:

  • break, continue, return

📌 5. Functions (Methods)

• Defining and calling methods

• Method parameters and return values

• Method overloading

• static vs instance methods

📌 6. Object-Oriented Programming (OOP) Concepts

• Classes & Objects

  • Creating a class and instantiating objects

• Constructors

  • Default & parameterized constructors

• Encapsulation

  • Access modifiers, getters/setters

• Inheritance

  • extends keyword, method overriding, super

• Polymorphism

  • Compile-time (overloading) and run-time (overriding)

• Abstraction

  • Abstract classes and interfaces