help with GUI assign a keystroke

[nomad]

I'm trying to figure out how to assign a keystroke and a click to a menu item.
Example If a user click on a menu and selects the Close the program
Menu and chose Close[/b]. I want the program to open (//inner class Section used for exit on menu 3 for fun) ie "Exit Program".

here is my code so far.

public class GUIMenu extends JFrame {
 
    public GUIMenu() {
 
        super("FeedBar 2");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
     //Build third menu in the menu bar.
        JMenuItem a1 = new JMenuItem("Close");
        a1.setMnemonic(KeyEvent.VK_D);
 
//Create the menu bar.
        JMenuBar menubar = new JMenuBar();
 
   //Build the Third menu.
        JMenu menu3 = new JMenu("Close the program");
        menu3.add(a1);
        
        menubar.add(menu3);
 
        // prepare user interface
        JTextArea edit = new JTextArea(8, 40);
        JScrollPane scroll = new JScrollPane(edit);
        BorderLayout bord = new BorderLayout();
        setLayout(bord);
 
        add("Center", scroll);
        setJMenuBar(menubar);
        pack();
        setVisible(true);
    }
 
	//inner class Section used for exit on menu 3 for fun
    class exitListener implements ActionListener {
        public void actionPerformed(ActionEvent arg0) {
 
                int x = JOptionPane.showOptionDialog(GUIMenu.this, "Exit Program?",
                                "Exit Request", JOptionPane.YES_NO_OPTION,
                                JOptionPane.QUESTION_MESSAGE, null, null,
                                JOptionPane.NO_OPTION);
                if (x == JOptionPane.YES_OPTION) {
                	GUIMenu.this.dispose();
                }//close the if statement
        }//close public void actionPerformed
}//close the class exitListener
 
 
    public static void main(String[] arguments) {
        GUIMenu frame = new GUIMenu();
    }
}

Thanks
nomad
PS I know I need add a listener of some type but I don't know where or what kind.