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JDK-Setup

Windows:

  1. Download JDK:

    • Visit the Oracle JDK Downloads page.
    • Choose the desired JDK version and download the Windows installer (.exe file).
    • Accept the license agreement during the download.

  2. Install JDK:

    • Run the downloaded installer.
    • Follow the on-screen instructions to complete the installation.
    • Note the installation directory (e.g., C:\Program Files\Java\jdk-<version>).

  3. Set Environment Variables:

    • Set the JAVA_HOME system environment variable to the JDK installation directory.
    • Add the bin directory of the JDK to the system PATH variable.

  4. Verify Installation:

    • Open a Command Prompt and run: 
      java -version
javac -version

macOS:

  1. Download JDK:

    • Visit the Oracle JDK Downloads page.
    • Choose the desired JDK version and download the macOS installer (.dmg file).
    • Accept the license agreement during the download.

  2. Install JDK:

    • Open the downloaded .dmg file.
    • Drag the JDK package to the Applications folder.
    • Note the installation directory (e.g., /Library/Java/JavaVirtualMachines/jdk-<version>.jdk/Contents/Home).

  3. Set Environment Variables (optional):

    • macOS usually sets the required environment variables automatically.
    • If necessary, you can add the following to your shell profile (e.g., ~/.bash_profile or ~/.zshrc): 
      export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-<version>.jdk/Contents/Home
export PATH=$PATH:$JAVA_HOME/bin

  4. Verify Installation:

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

Linux (Ubuntu as an example):

  1. Install OpenJDK via Package Manager:

    • Open a Terminal.
    • Run the following commands: 
      sudo apt update
sudo apt install default-jdk

  2. Set Environment Variables (optional):

    • Open your shell profile (e.g., ~/.bashrc or ~/.zshrc).
    • Add the following lines: 
      export JAVA_HOME=/usr/lib/jvm/default-java
export PATH=$PATH:$JAVA_HOME/bin

  3. Verify Installation:

    • Run: 
      java -version
javac -version

These instructions should help you set up the Java Development Kit (JDK) on Windows, macOS, and Linux. Adjust the paths and commands as needed for specific versions and system configurations.

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