Hello World Program in Java

Let us look at a simple code that will print the words Hello World.


Online Demo

public class MyFirstJavaProgram {

   /* This is my first java program.
    * This will print 'Hello World' as the output

   public static void main(String []args) {
      System.out.println("Hello World"); // prints Hello World

Let's look at how to save the file, compile, and run the program. Please follow the subsequent steps −

  • Open notepad and add the code as above.

  • Save the file as − MyFirstJavaProgram.java.

  • Open a command prompt window and go to the directory where you saved the class. Assume it's C:\.

  • Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption − The path variable is set).

  • Now, type ' java MyFirstJavaProgram ' to run your program.

  • You will be able to see ' Hello World ' printed on the window.


C:\> javac MyFirstJavaProgram.java
C:\> java MyFirstJavaProgram
Hello World