java 프로그램 시스템 트레이의 트레이 아이콘 표시

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 javax.swing.JFrame;


public class MySystemTray extends JFrame{

	public MySystemTray() {
		init();
	}

	public void init() {

		this.setSize(300, 200);
		this.setLocationRelativeTo(null);
		this.setTray();
		this.setVisible(true);
	}

	//      ：1.               
	public void setTray() {

		if(SystemTray.isSupported()){//              
			//      
			SystemTray tray = SystemTray.getSystemTray();
			//      ：1.    Image 2.    text 3.    popupMenu 4.        
			//1.  Image  
			Image image = Toolkit.getDefaultToolkit().getImage("trayIconImage/clientIcon.jpg");
			//2.    text
			String text = "MySystemTray";
			//3.    popupMenu
			PopupMenu popMenu = new PopupMenu();
			MenuItem itmOpen = new MenuItem("  ");
			itmOpen.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					Show();
				}				
			});
			MenuItem itmHide = new MenuItem("  ");
			itmHide.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					UnVisible();
				}
			});
			MenuItem itmExit = new MenuItem("  ");
			itmExit.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					Exit();
				}
			});
			popMenu.add(itmOpen);
			popMenu.add(itmHide);
			popMenu.add(itmExit);

			//      
			TrayIcon trayIcon = new TrayIcon(image,text,popMenu);
			//          
			try {
				tray.add(trayIcon);
			} catch (AWTException e1) {
				e1.printStackTrace();
			}
		}
	}

	//             （this    ）
	public void UnVisible() {
		this.setVisible(false);
	}
	public void Show() {
		this.setVisible(true);
	}
	public void Exit() {
		System.exit(0);
	}


	public static void main(String[] args) {
		new MySystemTray();
	}
}