Writing A Simple Program In Java

Anatomy of a Java Program

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

Key Parts Explained

• class: every piece of Java code lives inside a class.
• main method: the entry point where the JVM starts executing the program.
• System.out.println: prints text to the console.

Compiling and Running

Save the file as HelloWorld.java, compile with javac HelloWorld.java, then run with java HelloWorld — or simply click "Run" inside Eclipse.