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.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.ImageIcon;import javax.swing.JFrame;public class TestTray extends JFrame { private static final long serialVersionUID = -7078030311369039390L; public TestTray() { this.setSize(500, 400); this.setLocationRelativeTo(null);// 把窗體設(shè)置在屏幕中間 systemTray(); // 設(shè)置系統(tǒng)托盤(pán) // 添加關(guān)閉按鈕事件，關(guān)閉時(shí)候?qū)嵸|(zhì)是把窗體隱藏 this.addWindowListener(new WindowAdapter() {  @Override  public void windowClosing(WindowEvent e) {  TestTray.this.setVisible(false);  } }); this.setVisible(true); } /** * 處理系統(tǒng)托盤(pán) */ private void systemTray() { if (SystemTray.isSupported()) { // 判斷系統(tǒng)是否支持托盤(pán)功能.  // 創(chuàng)建托盤(pán)右擊彈出菜單  PopupMenu popupMenu = new PopupMenu();    //創(chuàng)建彈出菜單中的退出項(xiàng)  MenuItem itemExit = new MenuItem("退出系統(tǒng)");  itemExit.addActionListener(new ActionListener() {   @Override   public void actionPerformed(ActionEvent e) {    System.exit(0);   }   });  popupMenu.add(itemExit);    //創(chuàng)建托盤(pán)圖標(biāo)  ImageIcon icon = new ImageIcon("img/icon.png"); // 創(chuàng)建圖片對(duì)象  TrayIcon trayIcon = new TrayIcon(icon.getImage(), "測(cè)試系統(tǒng)托盤(pán)",   popupMenu);  trayIcon.addActionListener(new ActionListener() {  @Override  public void actionPerformed(ActionEvent e) {   TestTray.this.setVisible(true);  }  });    //把托盤(pán)圖標(biāo)添加到系統(tǒng)托盤(pán)  //這個(gè)可以點(diǎn)擊關(guān)閉之后再放到托盤(pán)里面，在此是打開(kāi)程序直接顯示托盤(pán)圖標(biāo)了  try {  SystemTray.getSystemTray().add(trayIcon);  } catch (AWTException e1) {  e1.printStackTrace();  } } } public static void main(String[] args) { new TestTray(); }}