package org.pdp.frame;  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.net.URL;  import javax.swing.ImageIcon;  import javax.swing.JFrame;  import javax.swing.JMenu;  import javax.swing.JMenuBar;  import javax.swing.JMenuItem;    public class MainFrame extends JFrame implements ActionListener{      private static final long serialVersionUID = -7078030311369039390L;      private JMenu menu;      private JMenuBar jmenuBar;      private String [] jmItemName = {"置于托盘","系统退出"};      public MainFrame(){          super("电话薄");          init();          this.setSize(500,400);          this.setJMenuBar(jmenuBar);          this.setLocationRelativeTo(null);          systemTray();    //系统托盘      }      /**       * 初始化界面       */      public void init(){          menu = new JMenu("系统窗体");          for(int i=0; i<jmItemName.length; i++){              JMenuItem menuItem = new JMenuItem(jmItemName[i]);              menuItem.addActionListener(this);              menu.add(menuItem);          }          this.jmenuBar = new JMenuBar();          this.jmenuBar.add(menu);      }      @Override      public void actionPerformed(ActionEvent e) {          String actions = e.getActionCommand();          if("置于托盘".equals(actions)){              this.setVisible(false);          }          if("系统退出".equals(actions)){              System.exit(0);          }      }      /**系统托盘图标处理.*/      private void  systemTray(){          if(SystemTray.isSupported()){    //判断系统是否支持托盘功能.              URL resource = this.getClass().getResource("systray.jpg");    //获得图片路径              ImageIcon icon = new ImageIcon(resource); //创建图片对象              PopupMenu popupMenu = new PopupMenu(); //创建弹出菜单对象              MenuItem itemExit = new MenuItem("退出系统");    //创建弹出菜单中的退出项              MenuItem itemShow = new MenuItem("显示窗体"); //创建弹出菜单中的显示主窗体项.              itemExit.addActionListener(new ActionListener() {     //给退出像添加事件监听                  @Override                  public void actionPerformed(ActionEvent e) {                      System.exit(0);                  }                         });              itemShow.addActionListener(new ActionListener() { //给窗体最小化添加事件监听.                  @Override                  public void actionPerformed(ActionEvent e) {                      setVisible(true);                  }              });              popupMenu.add(itemExit);              popupMenu.add(itemShow);              TrayIcon trayIcon = new TrayIcon(icon.getImage(),"电话薄系统",popupMenu);              SystemTray sysTray = SystemTray.getSystemTray();              try {                  sysTray.add(trayIcon);              } catch (AWTException e1) {    }          }      }      /**       * 主方法       * @param args       */      public static void main(String[] args) {          new MainFrame().setVisible(true);      }  }