Adding Code to the Generated Source File

Because you have left the Create Main Class checkbox selected in the New Project wizard, the IDE has created a skeleton class for you. You can add the "Hello World!" message to the skeleton code by replacing the line:

            // TODO code application logic here
    

            System.out.println("Hello World!");
    

Save the change by choosing File >: Save.

The file should look something like the following:

 /*
 * HelloWorldApp.java
 *
 * Created on September 15, 2006, 5:27 PM
 *
 * To change this template, choose Tools >: Template Manager
 * and open the template in the editor.
 */

 package helloworldapp;

 /**
 * The HelloWorldApp class implements an application that
 * simply displays "Hello World!" to the standard output.
 */
 public class HelloWorldApp {

     /** Creates a new instance of HelloWorldApp */
     public HelloWorldApp() {
     }

     /**
     * @param args the command line arguments
     */
     public static void main(String[] args) {
         //Display "Hello World!"
         System.out.println("Hello World!");
     }

 }