Complete Java Development Environment Setup Guide

System Requirements Check

Before installation, verify your system meets these requirements:

Windows 10/11, macOS 12+, or Linux (Ubuntu 22.04 LTS recommended)
4GB RAM minimum (8GB recommended for modern IDEs)
2GB disk space for JDK + 1GB for IDE

Java Development Kit (JDK) Installation

For Windows:

Download JDK 21 LTS from Oracle’s website

Run the installer (select “Add to PATH” during installation)

Verify installation:

java -version
javac -version

java -version
javac -version

For macOS:

Using Homebrew (recommended):

brew install --cask oracle-jdk

brew install --cask oracle-jdk

Or download directly from Oracle
Verify with same commands as Windows

For Linux (Ubuntu/Debian):

sudo apt update
sudo apt install openjdk-21-jdk

sudo apt update
sudo apt install openjdk-21-jdk

Hello World

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

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