NetBeans IDE 6.0 Java Quick Start Tutorial

Content on this page applies to NetBeans IDE 6.0Welcome to NetBeans IDE!

This tutorial provides a very simple and quick introduction to the NetBeans IDE workflow by walking you through the creation of a simple "Hello World" Java console application. Once you are done with this tutorial, you will have a general knowledge of how to create, build, and run applications in the IDE.

This tutorial takes less than 10 minutes to complete.

After you finish this tutorial, you can move on to the NetBeans IDE learning trails that are provided on this DVD. The learning trails provide comprehensive tutorials that highlight a wider range of IDE features and programming techniques for a variety of application types. If you do not want to do a "Hello World" application, you can skip this tutorial and jump straight to the learning trails.

Before You Begin

To write your first program, you'll need to have the following software installed on your system:

Setting Up the Project

To create an IDE project:

  1. Start NetBeans IDE.
  2. In the IDE, choose File > New Project, as shown in the figure below.

    NetBeans IDE with the File > New Project menu item selected.

  3. In the New Project wizard, expand the Java category and select Java Application as shown in the figure below. Then click Next.

    NetBeans IDE, New Project wizard, Choose Project page.

  4. In the Name and Location page of the wizard, do the following (as shown in the figure below):

    NetBeans IDE, New Project wizard, Name and Location page.

  5. Click Finish.

The project is created and opened in the IDE. You should see the following components:

NetBeans IDE with the HelloWorldApp project open.

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
with the line:
            System.out.println("Hello World!");

Save the change by choosing File > Save.

The file should look something like the following:

 * Created on Sep 7, 2007, 6:44:16 PM
 * To change this template, choose Tools | Templates
 * and open the template in the editor.

package helloworldapp;

 * @author Sonya Bannister
public class HelloWorldApp {

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



Compiling the Source File

To compile your source file, choose Build > Build Main Project from the IDE's main menu.

You can view the output of the build process by choosing Window > Output > Output.

The Output window opens and displays output similar to what you see in the following figure.

Output window showing results of building the HelloWorld project.

If the build output concludes with the statement BUILD SUCCESSFUL, congratulations! You have successfully compiled your program!

If the build output concludes with the statement BUILD FAILED, you probably have a syntax error in your code. Errors are reported in the Output window as hyper-linked text. Click such a hyper-link to navigate to the source of an error. You can then fix the error and once again choose Build > Build Main Project.

When you build the project, the bytecode file HelloWorldApp.class is generated. You can see where the new file is generated by opening the Files window and expanding the Hello World App/build/classes/helloworldapp node as shown in the following figure.

Files window, showing the generated .class file.

Now that you have built the project, you can run your program.

Running the Program

From the IDE's menu bar, choose Run > Run Main Project.

The next figure shows what you should now see.

The program prints Hello World! to the Output window (along with other output from the build script).

Congratulations! Your program works!

You now know how to accomplish some of the most common programming tasks in the IDE.

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Next Steps

For a broader introduction to useful IDE features that are generally applicable to Java application development, see Introduction to Developing General Java Applications.

To find information specific to the kind of applications you are developing, use the NetBeans IDE learning trail for that type of application. Each learning trail contains a series of tutorials and guides that range in scope from basic to advanced. The following learning trails are available: