java 弹出框最小化任务栏，右键弹出

package com.future.egov.autoUpdate;
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.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;

/**
 *  弹出框最小化任务栏，右键弹出
 * @author Administrator
 */
public class test extends JFrame {
    long setTime = 30 * 1000;
    JLabel jl = new JLabel("time：");
    JLabel jl1 = new JLabel();
    PopupMenu popupMenu1 = new PopupMenu();
    MenuItem menuItem1 = new MenuItem();

    public void examTime() {
        this.setLocation(200, 200);
        this.setSize(300, 200);
        isTray();
        this.setVisible(true);
        addWindowListener(new WindowAdapter() {
            public void windowIconified(WindowEvent evt) {
                unVisible();
            }
        });

        popupMenu1.setLabel("PopupMenu");
        menuItem1.setLabel("open");
        menuItem1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent evt) {
                showw();
            }
        });
        popupMenu1.add(menuItem1);
    }

    public void unVisible() {
        this.setVisible(false);
    }

    public void showw() {
        this.setVisible(true);
    }

    public void isTray() {
        try {
            if (SystemTray.isSupported()) {// 判断当前平台是否支持系统托盘
                SystemTray st = SystemTray.getSystemTray();
                Image image = Toolkit.getDefaultToolkit().getImage("C:/Users/Administrator/Desktop/test.gif");//定义托盘图标的图片
                TrayIcon ti = new TrayIcon(image);
                ti.setToolTip("test ");
                ti.setPopupMenu(this.popupMenu1);
                st.add(ti);
            }
        } catch (Exception e) {
        }

    }

    public static void main(String[] args) {
        new test().examTime();
    }
}