Java Hello World Program (With Main Method and System.out.println)

This tutorial will guide you through writing a basic Hello World program in Java. This is often the first program written when learning any new language, and Java is no exception.

Whether you're searching for:

• Hello World for Java

• Java Hello World Program

• Java Language Hello World

You’re in the right place!

Introduction

The Hello World program is a perfect starting point to understand the structure of a Java program. It includes the main method, class declaration, and the System.out.println() statement.

Basic Java Hello World Program

// HELLO WORLD PROGRAM IN JAVA USING MAIN METHOD
// Java System.out.println() function
// Java main() method

public class Main {
    // It's the main function of the program
    public static void main(String[] args) {
        // Step-1 Display a label message
        System.out.println("JAVA HELLO WORLD PROGRAM");

        // Step-2 Print the actual Hello World message
        System.out.println("HELLO, WORLD!");
    }
}

Run

Output

Using a Function

// JAVA HELLO WORLD PROGRAM USING A SEPARATE FUNCTION

public class Main {
    // This function prints the hello world messages
    public static void printMessage() {
        System.out.println("JAVA HELLO WORLD PROGRAM");
        System.out.println("HELLO, WORLD!");
    }

    public static void main(String[] args) {
        // Call the function to print the message
        printMessage();
    }
}

Run

Using a Loop

// JAVA HELLO WORLD PROGRAM USING FOR LOOP

public class Main {
    public static void main(String[] args) {
        // Step-1 Label message
        System.out.println("JAVA HELLO WORLD PROGRAM");

        // Step-2 Repeat Hello World 3 times using loop
        for (int i = 0; i < 3; i++) {
            System.out.println("HELLO, WORLD!");
        }
    }
}

Run

Common Mistakes to Avoid

• Missing the main() method signature.

• Incorrect class name (must match the file name in some IDEs).

• Forgetting semicolons ;.

• Not using System.out.println() properly.

FAQs

Q: Do I need to install anything to run Java code?
A: Yes, you’ll need the JDK (Java Development Kit) and optionally an IDE like IntelliJ or Eclipse.

Q: What does System.out.println() mean?
A: It's a standard Java statement used to display output in the console.

Q: Can I write Java without a main() method?
A: Not for standalone applications — the main() method is the entry point.