Java Setup

Install JDK (Java Development Kit)
Step 1:

Go to the official Oracle JDK download page:

https://www.oracle.com/java/technologies/javase-downloads.html
Step 2:
  • Download the latest JDK for your operating system (Windows, Mac, or Linux).
  • Run the installer and follow the installation steps (just click "Next", "Next", etc.).
Step 3:

After installing, set up the Environment Variable (only for Windows):

  • Open Control Panel → System → Advanced system settings → Environment Variables.
  • Under System Variables, click New:
    1. Variable Name: JAVA_HOME
    2. Variable Value: Path to your JDK installation (like C:\Program Files\Java\jdk-21)
  • Then, edit the Path variable:
    1. Add %JAVA_HOME%\bin to the list.
Step 4:

Check if Java is installed correctly:

Open Command Prompt (or Terminal) and type:

    
        java -version

and

    
        javac -version

If you see the version printed (like java version "21"), ✅ it's installed!

Install an IDE (Integrated Development Environment)

You can use a simple text editor + terminal, but using an IDE makes Java much easier.

  1. (a) Install IntelliJ IDEA
    • Go to: 👉 https://www.jetbrains.com/idea/download/
    • Download IntelliJ IDEA Community Edition (free).
    • Install it normally (Next, Next, Finish).
    • Open IntelliJ → Create New Project → Select Java → Done!
    IntelliJ is smart, fast, and popular for Java development.
  2. Install Eclipse IDE
    • Go to: 👉 https://www.eclipse.org/downloads/
    • Download the Eclipse IDE for Java Developers.
    • Install and open Eclipse.
    • Create a new Java Project → Add a class → Start coding!
    Eclipse is very powerful, especially for big Java projects.