JAVA SWING 系统托盘（右下角小图标）

JAVA SWING 系统托盘（右下角小图标）

package mexxen.questionnaire.view;

import java.awt.AWTException;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Image;

import java.awt.MenuBar;

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.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

/**images文件夹放在项目根目录

“./”为当前项目根目根

*/

public class QuestionnaireFrame extends JFrame{

/**

* 

*/

private static final long serialVersionUID = 1L;

private SystemTray tray;

private TrayIcon trayIcon;

public QuestionnaireFrame(){

super();

// 窗口最大化

this.setExtendedState(Frame.MAXIMIZED_BOTH);

this.setSize(800, 600);

// 初始在屏幕中央 

setLocationRelativeTo(null);

// 使点击红X可以退出程序 

// setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setTitle("问卷调查系统");

// 设置标题图标

Toolkit tk = Toolkit.getDefaultToolkit();

Image img = tk.getImage("./images/title.png");

this.setIconImage(img);

// 设置窗口关闭事件监听

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

// 将托盘图标添加到系统的托盘实例中

try {

tray.add(trayIcon);

System.out.println("关闭");

setVisible(false);

} catch (AWTException e1) {

e1.printStackTrace();

}

}

});

if(SystemTray.isSupported()){

System.out.println("调 用tray");

tray();

}

}

private void tray() {

// 获得本操作系统托盘的实例

tray = SystemTray.getSystemTray();

// 显示在托盘中的图标

ImageIcon icon = new ImageIcon("./images/title.png");

// 构造一个右键弹出式菜单

PopupMenu pop = new PopupMenu(); 

MenuItem exit = new MenuItem("关闭服务");

pop.add(exit);

trayIcon = new TrayIcon(icon.getImage(),"问卷调查系统\n版权所有：上海赫盛", pop);

// 这句很重要，没有会导致图片显示不出来

trayIcon.setImageAutoSize(true);

trayIcon.addMouseListener(new MouseAdapter() {

public void mouseClicked(MouseEvent e) {

if(e.getClickCount() == 2){

tray.remove(trayIcon);

setVisible(true);

// 还原成原来的窗口，而不是显示在任务栏

setExtendedState(NORMAL);

}

}

});

exit.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

tray.remove(trayIcon);

System.exit(0);

}

});

}

}