Java桌面程序最小化到托盘

package com.zeph.android.shutdown;

import java.awt.AWTException;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;

public class TrayDemo extends JFrame {
	static TrayIcon trayIcon = null; // 托盘图标
	static SystemTray tray = null; // 本操作系统托盘的实例

	TrayDemo() {
		if (SystemTray.isSupported()) // 如果操作系统支持托盘
		{
			this.tray();
		}
		this.setSize(300, 200);
		this.setVisible(true);
		// 窗口关闭时触发事件
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}

			public void windowIconified(WindowEvent e) {
				try {
					tray.add(trayIcon); // 将托盘图标添加到系统的托盘实例中
					// setVisible(false); // 使窗口不可视
					dispose();
				} catch (AWTException ex) {
					ex.printStackTrace();
				}
			}
		});
	}

	void tray() {
		tray = SystemTray.getSystemTray(); // 获得本操作系统托盘的实例
		ImageIcon icon = new ImageIcon("wifi.png"); // 将要显示到托盘中的图标
		PopupMenu pop = new PopupMenu(); // 构造一个右键弹出式菜单
		MenuItem show = new MenuItem("打开程序(s)");
		MenuItem exit = new MenuItem("退出程序(x)");
		pop.add(show);
		pop.add(exit);
		trayIcon = new TrayIcon(icon.getImage(), "开心农场收菜工+工厂清理工 V1.5", pop);
		// 添加鼠标监听器，当鼠标在托盘图标上双击时，默认显示窗口
		trayIcon.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent e) {
				if (e.getClickCount() == 2) // 鼠标双击
				{
					// tray.remove(trayIcon); // 从系统的托盘实例中移除托盘图标
					setExtendedState(JFrame.NORMAL);
					setVisible(true); // 显示窗口
					toFront();
				}
			}
		});
		show.addActionListener(new ActionListener() // 点击“显示窗口”菜单后将窗口显示出来
		{
			public void actionPerformed(ActionEvent e) {
				// tray.remove(trayIcon); // 从系统的托盘实例中移除托盘图标
				setExtendedState(JFrame.NORMAL);
				setVisible(true); // 显示窗口
				toFront();
			}
		});
		exit.addActionListener(new ActionListener() // 点击“退出演示”菜单后退出程序
		{
			public void actionPerformed(ActionEvent e) {
				System.exit(0); // 退出程序
			}
		});
	}

	public static void main(String[] args) throws Exception {
		new TrayDemo();
	}
}

最小化托盘的图标放在这里