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Steps to Write, Compile and Run Java Program

1.Steps to write a java program​

1. Open a Code Editor​

  • Use any editor like:
    • Visual Studio Code
    • IntelliJ IDEA
    • Notepad (basic)

2. Create a Java File​

  • File name must match the class name
  • Example: 
    Hello.java

3. Write the Program​

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

4. Save the File​

  • Save with .java extension
  • Example: Hello.java

2.Steps to Compile and Run a Java Program​

1. Open Terminal / Command Prompt​

  • macOS / Linux → Terminal
  • Windows → Command Prompt / PowerShell

2. Compile the Program​

javac Hello.java

This creates:

Hello.class

3. Run the Program​

java Hello

Output:

Hello, World!

Important Rules​

  • File name = Class name
  • Java is case-sensitive
  • Do NOT include .class while running