JAVA开发系统托盘程序

参考文章《New System Tray Functionality in Java SE 6》，网址 http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javase6/systemtray/ 。
JDK必须要在 1.6 版本。

最近项目中要实现定时任务常驻系统，能够同时有一个比较友好的操作方式提供给最终用户，于是考虑采用 System Tray 。刚好项目中使用的也是 JDK1.6 ，于是参考上面文章的例子，简单修改一下，增加自己需要的功能即可。

转帖代码如下：

    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 java.awt.event.MouseEvent;  
    import java.awt.event.MouseListener;  
      
    public class SystemTrayTest  
    {  
          
        public SystemTrayTest()  
        {  
              
            final TrayIcon trayIcon;  
      
            if (SystemTray.isSupported()) {  
      
                SystemTray tray = SystemTray.getSystemTray();  
                Image image = Toolkit.getDefaultToolkit().getImage("tray.gif");  
      
                MouseListener mouseListener = new MouseListener() {  
                      
                    public void mouseClicked(MouseEvent e) {  
                        System.out.println("Tray Icon - Mouse clicked!");                   
                    }  
                    public void mouseEntered(MouseEvent e) {  
                        System.out.println("Tray Icon - Mouse entered!");                   
                    }  
                    public void mouseExited(MouseEvent e) {  
                        System.out.println("Tray Icon - Mouse exited!");                   
                    }  
                    public void mousePressed(MouseEvent e) {  
                        System.out.println("Tray Icon - Mouse pressed!");                   
                    }  
                    public void mouseReleased(MouseEvent e) {  
                        System.out.println("Tray Icon - Mouse released!");                   
                    }  
      
                };  
      
                ActionListener exitListener = new ActionListener() {  
                    public void actionPerformed(ActionEvent e) {  
                        System.out.println("Exiting...");  
                        System.exit(0);  
                    }  
                };  
                  
                PopupMenu popup = new PopupMenu();  
                MenuItem defaultItem = new MenuItem("Exit");  
                defaultItem.addActionListener(exitListener);  
                popup.add(defaultItem);  
      
                trayIcon = new TrayIcon(image, "Tray Demo", popup);  
      
                ActionListener actionListener = new ActionListener() {  
                    public void actionPerformed(ActionEvent e) {  
                        trayIcon.displayMessage("Action Event",   
                            "An Action Event Has Been Peformed!",  
                            TrayIcon.MessageType.INFO);  
                    }  
                };  
                  
                trayIcon.setImageAutoSize(true);  
                trayIcon.addActionListener(actionListener);  
                trayIcon.addMouseListener(mouseListener);  
      
                //    Depending on which Mustang build you have, you may need to uncomment  
                //    out the following code to check for an AWTException when you add   
                //    an image to the system tray.  
      
                //    try {  
                          try {  
                            tray.add(trayIcon);  
                        } catch (AWTException e1) {  
                            // TODO Auto-generated catch block  
                            e1.printStackTrace();  
                        }  
                //    } catch (AWTException e) {  
                //        System.err.println("TrayIcon could not be added.");  
                //    }  
      
            } else {  
                System.err.println("System tray is currently not supported.");  
            }  
        }  
          
        /** 
         * @param args the command line arguments 
         */  
        public static void main(String[] args)  
        {  
            SystemTrayTest main = new SystemTrayTest();  
        }  
          
    }