Åbne Menu i Java

Hejsa eksperter.

Jeg har denne kode:

/*
* NewMDIApplication.java
*
* Created on 29. september 2006, 17:42
*/

/**
*
* @author  Jonas Dreyer
*/
public class NewMDIApplication extends javax.swing.JFrame {
   
    /** Creates new form NewMDIApplication */
    public NewMDIApplication() {
        initComponents();
    }
   
    /** This method is called from within the constructor to
    * initialize the form.
    * WARNING: Do NOT modify this code. The content of this method is
    * always regenerated by the Form Editor.
    */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        desktopPane = new javax.swing.JDesktopPane();
        menuBar = new javax.swing.JMenuBar();
        fileMenu = new javax.swing.JMenu();
        openMenuItem = new javax.swing.JMenuItem();
        saveMenuItem = new javax.swing.JMenuItem();
        saveAsMenuItem = new javax.swing.JMenuItem();
        exitMenuItem = new javax.swing.JMenuItem();
        editMenu = new javax.swing.JMenu();
        cutMenuItem = new javax.swing.JMenuItem();
        copyMenuItem = new javax.swing.JMenuItem();
        pasteMenuItem = new javax.swing.JMenuItem();
        deleteMenuItem = new javax.swing.JMenuItem();
        helpMenu = new javax.swing.JMenu();
        contentMenuItem = new javax.swing.JMenuItem();
        aboutMenuItem = new javax.swing.JMenuItem();
        jMenu1 = new javax.swing.JMenu();
        jMenuItem1 = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("LaZoR programming");
        setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));

        fileMenu.setText("File");
        openMenuItem.setText("Open");
        fileMenu.add(openMenuItem);

        saveMenuItem.setText("Save");
        fileMenu.add(saveMenuItem);

        saveAsMenuItem.setText("Save As ...");
        fileMenu.add(saveAsMenuItem);

        exitMenuItem.setText("Exit");
        exitMenuItem.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                exitMenuItemActionPerformed(evt);
            }
        });

        fileMenu.add(exitMenuItem);

        menuBar.add(fileMenu);

        editMenu.setText("Edit");
        cutMenuItem.setText("Cut");
        editMenu.add(cutMenuItem);

        copyMenuItem.setText("Copy");
        editMenu.add(copyMenuItem);

        pasteMenuItem.setText("Paste");
        editMenu.add(pasteMenuItem);

        deleteMenuItem.setText("Delete");
        editMenu.add(deleteMenuItem);

        menuBar.add(editMenu);

        helpMenu.setText("Help");
        contentMenuItem.setText("Contents");
        helpMenu.add(contentMenuItem);

        aboutMenuItem.setText("About");
        helpMenu.add(aboutMenuItem);

        menuBar.add(helpMenu);

        jMenu1.setText("Menu");
        jMenuItem1.setText("Start et program");
        jMenuItem1.setNextFocusableComponent(aboutMenuItem);
        jMenu1.add(jMenuItem1);

        menuBar.add(jMenu1);

        setJMenuBar(menuBar);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(desktopPane, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(desktopPane, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 279, Short.MAX_VALUE)
        );
        pack();
    }// </editor-fold>
   
    private void exitMenuItemActionPerformed(java.awt.event.ActionEvent evt) {                                           
        System.exit(0);
    }                                           
   
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewMDIApplication().setVisible(true);
            }
        });
    }
   
    // Variables declaration - do not modify
    private javax.swing.JMenuItem aboutMenuItem;
    private javax.swing.JMenuItem contentMenuItem;
    private javax.swing.JMenuItem copyMenuItem;
    private javax.swing.JMenuItem cutMenuItem;
    private javax.swing.JMenuItem deleteMenuItem;
    private javax.swing.JDesktopPane desktopPane;
    private javax.swing.JMenu editMenu;
    private javax.swing.JMenuItem exitMenuItem;
    private javax.swing.JMenu fileMenu;
    private javax.swing.JMenu helpMenu;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JMenuItem openMenuItem;
    private javax.swing.JMenuItem pasteMenuItem;
    private javax.swing.JMenuItem saveAsMenuItem;
    private javax.swing.JMenuItem saveMenuItem;
    // End of variables declaration
   
}

Også har jeg en menu der hedder "MENU" under menuen hedder "Start et program" Så når man klikker på "Start program" skal den åbne et vindue hvor man kan starte et program.

Er der en simpel kode for det?

Eller er det stort?
Vis det er for stor en kode. Hvordan starter man så et enkelt program.

MVh Temp