systemtraydemo.java

此程序实现了用java编写系统托盘。使用了jdk中的java.awt.SystemTray

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.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class SystemTrayDemo extends JFrame{
    private TrayIcon trayIcon = null;   
    public SystemTrayDemo(){
        this.setTitle("系统托盘的例子");
        jbInit();
        this.setSize(200, 250);
        this.setLocation(300, 300);
    }
    public void jbInit(){
        if(SystemTray.isSupported()){ //检查当前系统是否支持系统托盘
             SystemTray tray = SystemTray.getSystemTray();//获取表示桌面托盘区的 SystemTray 实例。
             Image image  = Toolkit.getDefaultToolkit().getImage("D:\\xing.gif");
             PopupMenu popupMenu = new PopupMenu(); 
             MenuItem  exitItem  = new MenuItem("关闭"); 
             MenuItem  menuItema  = new MenuItem("menu a"); 
             MenuItem  menuItemb = new MenuItem("menu b"); 
             MenuItem  menuItemc  = new MenuItem("menu c"); 
             MenuItem  menuItemd = new MenuItem("menu d"); 
             exitItem.addActionListener(new  ActionListener(){
                 public void actionPerformed(ActionEvent e)     {   
                     try{     
                          System.exit(0);     
                       }catch(Exception   ex)   {   
                           ex.printStackTrace();   
                       }   
                 }
             });      
             popupMenu.add(menuItema); 
             popupMenu.add(menuItemb); 
             popupMenu.add(menuItemc); 
             popupMenu.add(menuItemd); 
             popupMenu.add(exitItem);  
             trayIcon = new TrayIcon(image, "系统托盘{kissjava}",  popupMenu);   
             trayIcon.addMouseListener(new java.awt.event.MouseAdapter(){
                @Override
                public void mouseClicked(MouseEvent e) {
                   if(e.getClickCount()==2){   
                       showIT(true);   
                    }
                }     
             });
             try{   
                  tray.add(trayIcon);  // 将 TrayIcon 添加到 SystemTray。 
             } catch   (AWTException   e)     {   
                  System.err.println(e);   
             }
        }else{
            System.out.println("你的系统不支持系统托盘");
        }
        ImageIcon icon = new ImageIcon();
        try{
            URL url = new URL("http://img1.qq.com/ent/pics/11436/11436218.jpg");
            icon = new ImageIcon(url);
        }catch(Exception e){
            
        }    
        JLabel label = new JLabel();
        label.setIcon(icon);
        this.add(label);
    }
    public void showIT(boolean visable){
        if(this.isVisible() != visable)
            this.setVisible(visable);
    }
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                new SystemTrayDemo().setVisible(true);
            }
        });
    }
}