Help needed with NetBeans IDE so sample code will work please?

Hi Folks,

Below is some sample code for a Java Applet. If I manually compile it using
the command line interpreter & fire it off using an HTML document it works
fine. However if I create a project in NetBeans Right Click on the
ShowDocument.java file and click Run File, I get a message in the output
window "createGUI didn't successfully complete".

Can anyone please tell me exactly what I need to do to get this (and other)
sample code to actually work inside the NetBeans IDE.

Regards,

M

/*
 * ShowDocument.java
 *
 * Created on 19 October 2006, 07:42
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.me.ShowDocument;

import java.applet.AppletContext;
import javax.swing.*;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.*;
import java.net.URL;
import java.net.MalformedURLException;

public class ShowDocument extends JApplet
                          implements ActionListener {
    URLWindow urlWindow;

    public void init() {
        //Execute a job on the event-dispatching thread:
        //creating this applet's GUI.
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    createGUI();
                }
            });
        } catch (Exception e) {
            System.err.println("createGUI didn't successfully complete");
        }
    }

    private void createGUI() {
        JButton button = new JButton("Bring up URL window");
        button.addActionListener(this);
        add(button);

        JFrame.setDefaultLookAndFeelDecorated(true);
        urlWindow = new URLWindow(getAppletContext());
        urlWindow.pack();
    }

    public void destroy() {
        //Execute a job on the event-dispatching thread:
        //creating this applet's GUI.
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    destroyGUI();
                }
            });
        } catch (Exception e) { }
    }

    private void destroyGUI() {
        urlWindow.setVisible(false);
        urlWindow = null;
    }

    public void actionPerformed(ActionEvent event) {
        urlWindow.setVisible(true);
    }
}

class URLWindow extends JFrame
                        implements ActionListener {
    JTextField urlField;
    JComboBox choice;
    AppletContext appletContext;

    public URLWindow(AppletContext appletContext) {
        super("Show a Document!");
        this.appletContext = appletContext;

        JPanel contentPane = new JPanel(new GridBagLayout());
        setContentPane(contentPane);
        contentPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;

        JLabel label1 = new JLabel("URL of document to show: ",
                                   JLabel.TRAILING);
        add(label1, c);

        urlField = new JTextField("http://java.sun.com/", 20);
        label1.setLabelFor(urlField);
        urlField.addActionListener(this);
        c.gridwidth = GridBagConstraints.REMAINDER;
        c.weightx = 1.0;
        add(urlField, c);

        JLabel label2 = new JLabel("Window/frame to show it in: ",
                                   JLabel.TRAILING);
        c.gridwidth = 1;
        c.weightx = 0.0;
        add(label2, c);

        String[] strings = {
            "(browser's choice)", //don't specify
            "My Personal Window", //a window named "My Personal Window"
            "_blank", //a new, unnamed window
            "_self",
            "_parent",
            "_top" //the Frame that contained this applet
        };
        choice = new JComboBox(strings);
        label2.setLabelFor(choice);
        c.fill = GridBagConstraints.NONE;
        c.gridwidth = GridBagConstraints.REMAINDER;
        c.insets = new Insets(5,0,0,0);
        c.anchor = GridBagConstraints.LINE_START;
        add(choice, c);

        JButton button = new JButton("Show document");
        button.addActionListener(this);
        c.weighty = 1.0;
        c.ipadx = 10;
        c.ipady = 10;
        c.insets = new Insets(10,0,0,0);
        c.anchor = GridBagConstraints.PAGE_END;
        add(button, c);
    }

    public void actionPerformed(ActionEvent event) {
        String urlString = urlField.getText();
        URL url = null;
        try {
            url = new URL(urlString);
        } catch (MalformedURLException e) {
            System.err.println("Malformed URL: " + urlString);
        }

        if (url != null) {
            if (choice.getSelectedIndex() == 0) {
                appletContext.showDocument(url);
            } else {
                appletContext.showDocument(url,
                                  (String)choice.getSelectedItem());
            }
        }
    }
}