我在程序中实测必须是16*16的图片才行

下面的这个程序简单地实现了把Java应用程序缩小到托盘的方法.

程序运行的jdk要是1.6才行,因为这是J2SDK1.6新加的一些类和方法.

import java.awt.*;

import java.io.*;

import javax.swing.*;

import java.awt.event.*;

import javax.imageio.ImageIO;

public class Test extends JFrame{

private TrayIcon trayIcon;//托盘图标

private SystemTray systemTray;//系统托盘

public Test()

{

super("系统托盘图标");

systemTray = SystemTray.getSystemTray();//获得系统托盘的实例

setSize(150,150);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

try {

trayIcon = new TrayIcon(ImageIO.read(new File("0.gif")));

systemTray.add(trayIcon);//设置托盘的图标，0.gif与该类文件同一目录

}

catch (IOException e1) {e1.printStackTrace();}

catch (AWTException e2) {e2.printStackTrace();}

this.addWindowListener(

new WindowAdapter(){

public void windowIconified(WindowEvent e){

dispose();//窗口最小化时dispose该窗口

}

});

trayIcon.addMouseListener(

new MouseAdapter(){

public void mouseClicked(MouseEvent e){

if(e.getClickCount() == 2)//双击托盘窗口再现

setExtendedState(Frame.NORMAL);

setVisible(true);

}

});

}

public static void main(String args[])

{

new Test();

}

}

另：

package awt;

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.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

public class TrayDemo extends JFrame {

private TrayIcon trayIcon = null; // 托盘图标

private SystemTray tray = null; // 本操作系统托盘的实例

public static TrayDemo trayDemo = new TrayDemo();

private TrayDemo() {

init();

}

public void init() {

if (SystemTray.isSupported()) { // 如果操作系统支持托盘

this.tray();

}

this.setSize(300, 200);

this.setResizable(false);

// 窗口关闭时触发事件

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0);

}

public void windowIconified(WindowEvent e) {

try {

tray.add(trayIcon); // 将托盘图标添加到系统的托盘实例中

//setVisible(false); // 使窗口不可视

dispose();

} catch (AWTException ex) {

ex.printStackTrace();

}

}

});

}

private void tray() {

tray = SystemTray.getSystemTray(); // 获得本操作系统托盘的实例

ImageIcon icon = new ImageIcon("images/30.gif"); // 将要显示到托盘中的图标

PopupMenu pop = new PopupMenu(); // 构造一个右键弹出式菜单

MenuItem show = new MenuItem("打开程序(s)");

MenuItem exit = new MenuItem("退出程序(x)");

pop.add(show);

pop.add(exit);

trayIcon = new TrayIcon(icon.getImage(), "车辆管理系统", pop);

/**

* 添加鼠标监听器，当鼠标在托盘图标上双击时，默认显示窗口

*/

trayIcon.addMouseListener(new MouseAdapter() {

public void mouseClicked(MouseEvent e) {

if (e.getClickCount() == 2) { // 鼠标双击

tray.remove(trayIcon); // 从系统的托盘实例中移除托盘图标

setExtendedState(JFrame.NORMAL);

setVisible(true); // 显示窗口

toFront();

}

}

});

show.addActionListener(new ActionListener() { // 点击“显示窗口”菜单后将窗口显示出来

public void actionPerformed(ActionEvent e) {

tray.remove(trayIcon); // 从系统的托盘实例中移除托盘图标

setExtendedState(JFrame.NORMAL);

setVisible(true); // 显示窗口

toFront();

}

});

exit.addActionListener(new ActionListener() { // 点击“退出演示”菜单后退出程序

public void actionPerformed(ActionEvent e) {

System.exit(0); // 退出程序

}

});

}

/**

* 显示信息

*/

// 返回单一的实例对象

public static TrayDemo getInstanceTrayDemo() {

return trayDemo;

}

// 处理窗口事件

}