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Installation Steps

Windows​

  1. Download JDK
    • Go to the official site: Oracle Corporation or OpenJDK (Adoptium)
    • Download the Windows x64 Installer (.exe)
  2. Install Java
    • Double-click the downloaded .exe file
    • Follow the setup wizard (Next → Install → Finish)
  3. Set Environment Variables
    • Open: System Properties → Advanced → Environment Variables Add:
      • JAVA_HOME → Path where JDK is installed
      • Example: C:\Program Files\Java\jdk-21 - Edit Path → Add: %JAVA_HOME%\bin
  4. Verify Installation
    • Open Command Prompt and run:
      • java -version
      • javac -version

Mac/Linux​

  1. Download JDK

    • From Oracle Corporation or OpenJDK (Adoptium)
    • Download macOS (.dmg or .pkg)

  2. Install Java

    • Open the .dmg / .pkg file
    • Follow installation instructions

  3. Set Environment Variables (Optional but Recommended)

    • Open Terminal and edit:
        nano ~/.zshrc
    • Add:
     export JAVA_HOME=$(/usr/libexec/java_home)
     export PATH=$JAVA_HOME/bin:$PATH
    • Apply changes:
    source ~/.zshrc

  4. Verify Installation

  • Open the Terminal and run: 
       java -version
       javac -version

Install Java using Homebrew (macOS)​

  1. Install Homebrew (if not installed)

    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

  2. Install OpenJDK

    brew install openjdk

  3. Set Environment Variables Add to ~/.zshrc (or ~/.bashrc):

     export JAVA_HOME=$(/usr/libexec/java_home)
     export PATH=$JAVA_HOME/bin:$PATH

    Apply changes:

    source ~/.zshrc

  4. Verify Installation

        java -version
        javac -version

Install Java using SDKMAN (macOS / Linux)​

  1. Install SDKMAN

    curl-s"https://get.sdkman.io" |bash

  2. Initialize SDKMAN

    source"$HOME/.sdkman/bin/sdkman-init.sh"

  3. List Available Java Versions

    sdk list java

  4. Install Java (Example: Java 21 LTS)

    sdk install java21-tem

  5. Set Default Version

    sdk default java21-tem

  6. Verify Installation

     java -version
     javac -version