Java Programming

• Introduction: What is Java? (JVM, JRE, JDK) and writing your first "Hello World" program. • Variables & Data Types: How to store data (integers, decimals, text). • Operators: Doing math and logic (addition, subtraction, comparing numbers). • Input/Output: Taking input from the user (Scanner class) and printing results.

• Conditional Statements: Using if, else if, else, and switch cases. • Loops: Repeating tasks using for, while, and do-while loops. • Break & Continue: Controlling the flow inside loops.

• Arrays: Storing multiple values of the same type in one variable. • 2D Arrays: Understanding matrices (rows and columns). • Strings: How to manipulate text (joining strings, finding length, changing case).

• Defining Methods: How to write a block of code and call it when needed. • Parameters & Return Types: Sending data into a method and getting a result back. • Method Overloading: Using the same method name for different tasks

This is the heart of Java. • Classes and Objects: The blueprints and the actual items. • Constructors: Special methods used to initialize objects. • The 4 Pillars of OOPs: 1. Inheritance: Passing properties from parent to child. 2. Polymorphism: One name, many forms (Overriding vs Overloading). 3. Abstraction: Hiding unnecessary details (Abstract classes and Interfaces). 4. Encapsulation: Protecting data using private keywords and Getters/Setters.

Making your program "crash-proof." • Exception Handling: Using try-catch blocks to handle errors gracefully. • Final vs Finally: Understanding how to clean up code. • File Handling: How to read from and write to .txt files.

How professional Java developers manage data. • ArrayList & LinkedList: Dynamic lists that grow and shrink. • HashMap: Storing data in Key-Value pairs. • HashSet: Storing unique items only.