Introduction to Java

What is Java?

Java is a high-level, object-oriented programming language designed for building robust, scalable applications. It follows the principle of "write once, run anywhere" (WORA) through the Java Virtual Machine (JVM).

Key Features

• Object-Oriented: Organized around objects and classes
• Platform Independent: Runs on any system with a JVM
• Secure: Built-in security features and memory management
• Multi-threaded: Supports concurrent programming
• Robust: Strong exception handling and type checking

Getting Started

Prerequisites

• Java Development Kit (JDK) installed [Used JDK 17 on the tutorial]
• A code editor or IDE (IntelliJ IDEA, VS Code, Eclipse)
• Basic programming knowledge

Your First Program

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, Java!");
    }
}

Basic Concepts

• Variables & Data Types: int, String, boolean, etc.
• Control Flow: if/else, loops, switch statements
• Functions/Methods: Reusable blocks of code
• Classes & Objects: Blueprints and instances
• Exception Handling: try/catch blocks

Resources

• Official Java Documentation
• Java Tutorial