How to run first Java Program using Eclipse IDE

Here’s a simple, beginner-friendly guide to run your first Java program using Eclipse IDE ☕💻

1. Install Required Software

Before starting, make sure you have:

• JDK (Java Development Kit) installed
• Eclipse IDE for Java Developers

👉 If Eclipse opens without errors and lets you create a Java project, your JDK is already configured.

2. Open Eclipse IDE

1. Launch Eclipse
2. Select a Workspace (a folder where your projects will be stored)
3. Click Launch

3. Create a New Java Project

1. Go to File → New → Java Project
2. Enter Project Name (example: FirstJavaProgram)
3. Click Finish

📁 You’ll see the project appear in the Package Explorer.

4. Create a Java Class

1. Right-click on src → New → Class
2. Enter:
   • Package name (optional): com.example
   • Class name: HelloWorld
3. ✅ Check public static void main(String[] args)
4. Click Finish

5. Write Your First Java Program

Eclipse will auto-generate code. Replace or confirm it looks like this:

package com.example;

public class HelloWorld {

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

6. Run the Java Program

Method 1 (Recommended for beginners)

• Right-click anywhere in the editor
• Select Run As → Java Application

Method 2

• Click the ▶ Run button on the toolbar

7. View Output in Console

At the bottom of Eclipse, you’ll see the Console showing:

Hello, World!

🎉 Congratulations! You’ve successfully run your first Java program.

Common Beginner Issues (Quick Fixes)

• ❌ No JDK found → Install JDK and set JAVA_HOME
• ❌ Run option disabled → Ensure main() method exists
• ❌ Red error marks → Check spelling and semicolons ;