JAvaウィンドウをタスクバーに最小化

import java.awt.AWTException;
import java.awt.Image;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.Toolkit;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
import javax.swing.JFrame;
import javax.swing.JLabel;
import com.wfy.MainForm;

public class TestSysteTray {
	public static void main(String args[]) {
		TrayIcon trayIcon = null;
		if (SystemTray.isSupported()) //             
		{
			SystemTray tray = SystemTray.getSystemTray(); //       
			
			URL imgURL = MainForm.class.getResource("/image/logo.jpg");
			Image image = Toolkit.getDefaultToolkit().getImage(imgURL);//    
			ActionListener listener = new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					//       
					JFrame frame = new JFrame();
					frame.setBounds(400, 400, 200, 200);
					JLabel label = new JLabel("welcome   JDK1.6");
					frame.add(label);
					frame.setVisible(true);
				}
			};

			//       
			PopupMenu popup = new PopupMenu();
			MenuItem defaultItem = new MenuItem("  ");
			defaultItem.addActionListener(listener);
			MenuItem exitItem = new MenuItem("  ");
			exitItem.addActionListener(new ActionListener() {

				public void actionPerformed(ActionEvent e) {
					System.exit(0);
				}
			});

			popup.add(defaultItem);
			popup.add(exitItem);
			trayIcon = new TrayIcon(image, "     ", popup);//   trayIcon
			trayIcon.addActionListener(listener);
			try {
				tray.add(trayIcon);
			} catch (AWTException e1) {
				e1.printStackTrace();
			}
		}
	}
}