先看"Hello World!"程序：
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class TrayIconTest extends JFrame{
JLabel lab=new JLabel("Hello World!!!");
public TrayIconTest(){
getContentPane().add(lab);
setSize(400,300);
addWindowListener(new MywindowListener());
}
class MywindowListener extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
public static void main(String[] args){
TrayIconTest test=new TrayIconTest();
test.show();
}
}
下面是加了托盘图标后的程序（运行时要用的图像、包等请下载我的文件夹，
程序仅供参考）：
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.border.*;
import com.jeans.trayicon.*; </td> <td width="172" valign="top"> </td> </tr> </table>
// Demo app for Java Tray Icon
public class SwingTrayIcon extends JFrame {
protected WindowsTrayIcon icon;
JLabel lab=new JLabel("Hello World!!!");
public SwingTrayIcon() throws TrayIconException, InterruptedException {
super("SwingTrayIcon");
WindowsTrayIcon.setWindowsMessageCallback(new WindowsMessageCallback());
setIconImage(loadImage("Duke16.gif"));
getContentPane().add(lab);
Image france = loadImage("Duke16.gif"); //装载图像
icon = new WindowsTrayIcon(france, 16, 16);//托盘图标
icon.setToolTipText("Hello");//设置托图标的工具提示
icon.setPopup(makePopup());//给托盘图标加弹出菜单
TestMouseListener mouse = new TestMouseListener();
icon.addMouseListener(mouse);//双击托盘图标的动作
icon.setVisible(true);//使托盘图标可见。
WindowsTrayIcon.keepAlive();
addWindowListener(new WindowClosingListener());//点窗口的关闭按钮时隐藏窗口
pack();
}
public TrayIconPopup makePopup() {//构造弹出菜单
TrayIconPopup popup = new TrayIconPopup();
TrayIconPopupSimpleItem item = new TrayIconPopupSimpleItem("&Show");
item.setDefault(true);
// Each menu item can have it's own ActionListener
item.addActionListener(new RestoreListener());
popup.addMenuItem(item);
item = new TrayIconPopupSimpleItem("&About");
item.addActionListener(new AboutListener());
popup.addMenuItem(item);
popup.addMenuItem(new TrayIconPopupSeparator());
// Add exit item
item = new TrayIconPopupSimpleItem("E&xit");
item.addActionListener(new ExitListener());
popup.addMenuItem(item);
return popup;
}
// Load a gif image (used for loading the 16x16 icon gifs)
public static Image loadImage(String fileName) {
return Toolkit.getDefaultToolkit().getImage("demo"+File.separator+"images"+File.separator+fileName);
}
// Use native windows look & feel
public static void setLookAndFeel() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception ex) {}
}
// 主函数
public static void main(String[] args) {
try {
setLookAndFeel();
TR.load("demo"+File.separator+"swing"+File.separator+"menu.eng");
String appName = "SwingTray";
long result = WindowsTrayIcon.sendWindowsMessage(appName, 1234);
if (result != -1) {
System.out.println("[Already running other instance of "+appName+" (returns: "+result+")].");
return;
}
// Init the Tray Icon library given the name for the hidden window
WindowsTrayIcon.initTrayIcon(appName);
SwingTrayIcon tray = new SwingTrayIcon();
SwingTrayIcon.centerDialog(tray);
tray.setSize(400,300);
tray.setVisible(true);
} catch (TrayIconException e) {
System.out.println("Error: "+e.getMessage());
} catch (IOException e) {
System.out.println("Error: "+e.getMessage());
} catch (InterruptedException e) { }
}
// 在屏幕中央的对话框
public static void centerDialog(Window frame) {
Dimension dialogSize = frame.getSize();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(screenSize.width/2 - dialogSize.width/2,
screenSize.height/2 - dialogSize.height/2);
}
private class WindowsMessageCallback implements TrayIconCallback {
public int callback(int param) {
System.out.println("[Other instance started (parameter: "+param+")].");
setVisible(true); toFront(); requestFocus();
// Return integer value to other process
return 4321;
}
}
private class ExitListener implements ActionListener {
public void actionPerformed(ActionEvent evt) {
doExit();
}
}
public class WindowClosingListener extends WindowAdapter {//隐藏窗口
public void windowClosing(WindowEvent e) {
setVisible(false);
}
}
public void doExit() {
WindowsTrayIcon.cleanUp();
System.exit(0);
}
// Callback listener handles about button
private class AboutListener implements ActionListener {
public void actionPerformed(ActionEvent evt) {
System.out.println("[About selected].");
// TestTrayIcon.this instead of this$0 for Java 1.3 compatibility
AboutBox box = new AboutBox(SwingTrayIcon.this);
centerDialog(box);
box.setVisible(true);
}
}
// Callback listener handles restore (click left on any icon / show popup menu)
private class RestoreListener implements ActionListener {
public void actionPerformed(ActionEvent evt) {
setVisible(true);
toFront(); requestFocus();
}
}
// 鼠标双击事件
public class TestMouseListener extends MouseAdapter {
public void mousePressed(MouseEvent evt) {
if ((evt.getModifiers() & MouseEvent.BUTTON1_MASK) != 0 && evt.getClickCount() == 2) {
setVisible(true);
}
}
}
}
// Stupid about box for demo app
class AboutBox extends JDialog {
// Create new about box given parent frame
public AboutBox(JFrame parent) {
// Make modal dialog given parent and title
super(parent, "About TrayIcon", true);
// Layout stuff
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout(3,3));
JPanel txt = new JPanel();
txt.setLayout(new GridLayout(0,1));
txt.add(new JLabel("TrayIcon version: "+WindowsTrayIcon.TRAY_VERSION));
txt.add(new JLabel("OS version: "+WindowsTrayIcon.getWindowsVersionString()));
txt.add(new JLabel("Written by Jan Struyf
panel.add(txt, BorderLayout.CENTER);
JPanel buttons = new JPanel();
buttons.setLayout(new FlowLayout());
JButton button = new JButton("OK");
buttons.add(button, BorderLayout.CENTER);
panel.add(buttons, BorderLayout.SOUTH);
// Close listeners for OK button and window button
button.addActionListener(new CloseListener());
addWindowListener(new CloseWindowListener());
panel.setBorder(new EmptyBorder(4,4,4,4));
setContentPane(panel);
pack();
}
private class CloseListener implements ActionListener {
public void actionPerformed(ActionEvent evt) {
dispose();
}
}
// Close listener for windows button
private class CloseWindowListener extends WindowAdapter {
public void windowClosing(WindowEvent evt) {
dispose();
}
}
}
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