How to use : Java GUI Menu/Menu Item (Icon Image Event Handler)

package com.java.myapp;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;

public class MyForm extends JFrame {

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				MyForm frame = new MyForm();
				frame.setVisible(true);
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public MyForm() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 362, 249);
		setTitle("ThaiCreate.Com Java GUI Tutorial");
		getContentPane().setLayout(null);
		
		// Menu Bar
        JMenuBar menuBar=new JMenuBar();
        
        // Menu 1
        JMenu menu1 = new JMenu("Menu 1");
        ImageIcon icon1 = new ImageIcon(getClass().getResource("open.gif"));
        JMenuItem menu1_1 = new JMenuItem("Sub Menu 1-1",icon1);
        menu1_1.setToolTipText("Open");
        menu1_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
            	JOptionPane.showMessageDialog(null,
            			"Open Command");
            }
        });
        
        ImageIcon icon2 = new ImageIcon(getClass().getResource("save.gif"));
        JMenuItem menu1_2 = new JMenuItem("Sub Menu 1-2",icon2);
        menu1.add(menu1_1);
        menu1.add(menu1_2);
        menuBar.add(menu1);

        // Menu 2
        JMenu menu2 = new JMenu("Menu 2");
        ImageIcon icon3 = new ImageIcon(getClass().getResource("right.gif"));
        JMenuItem menu2_1 = new JMenuItem("Sub Menu 2-1",icon3);
        ImageIcon icon4 = new ImageIcon(getClass().getResource("left.gif"));
        JMenuItem menu2_2 = new JMenuItem("Sub Menu 2-2",icon4);
        menu2.add(menu2_1);
        menu2.add(menu2_2);
        menuBar.add(menu2);

        setJMenuBar(menuBar);
	}
}