转自：http://hi.baidu.com/btb368/blog/item/18ec0d7a1a5173fc0ad187bf.html
由于jdk6之前并不支持
所以使用swt
jdk6可以支持了 建议使用jdk6的版本 因为它才是真正的跨平台
swt
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;
public class TrayBySwt {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("系统托盘BySwt");
shell.setLayout (new FillLayout());
Button button = new Button(shell, SWT.PUSH);
button.setText("隐藏窗口显示托盘图标");
ImageData imageData = new ImageData("E://workspace//myeclipse66//ra//Tray//src//16.gif");
Image image = new Image(display, imageData);
//取得系统托盘
final Tray tray = display.getSystemTray();
if (tray == null) {
System.out.println("当前操作系统不支持托盘图标");
} else {
final TrayItem item = new TrayItem(tray, SWT.NONE);
item.setToolTipText("我是托盘图标");
item.addListener (SWT.Show, new Listener () {
public void handleEvent (Event event) {
System.out.println("show");
}
});
item.addListener (SWT.Hide, new Listener () {
public void handleEvent (Event event) {
System.out.println("hide");
}
});
item.addListener (SWT.Selection, new Listener () {
public void handleEvent (Event event) {
System.out.println("selection");
}
});
final Menu menu = new Menu (shell, SWT.POP_UP);
for (int i = 0; i < 8; i++) {
MenuItem mi = new MenuItem (menu, SWT.PUSH);
mi.setText ("Item" + i);
mi.addListener (SWT.Selection, new Listener () {
public void handleEvent (Event event) {
System.out.println("selection " + event.widget);
}
});
if (i == 0) menu.setDefaultItem(mi);
}
item.addListener (SWT.MenuDetect, new Listener () {
public void handleEvent (Event event) {
menu.setVisible (true);
}
});
item.addListener(SWT.DefaultSelection, new Listener() {
public void handleEvent(Event event) {
shell.setVisible(true);
item.setVisible(false);
}
});
item.setImage(image);
button.addListener(SWT.Selection, new Listener(){
public void handleEvent(Event event) {
shell.setVisible(false);
item.setVisible(true);
}
});
item.setVisible(false);
}
shell.setBounds(50, 50, 300, 200);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
image.dispose();
display.dispose();
}
}
jdk6
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 javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.UIManager;
/**
*
* @author Mr.LiuTao
*/
public class TrayByJdk extends JFrame {
private JPanel pane = null;
private JButton button = null; // 启动托盘图标的按钮
private JLabel label = null; // 用来显示系统是否支持托盘的信息
private TrayIcon trayIcon = null; // 托盘图标
private SystemTray tray = null; // 本操作系统托盘的实例
//采用jdk1.6的托盘技术 实现跨平台的应用
public TrayByJdk() {
super("托盘技术演示");
try {
// 将LookAndFeel设置成Windows样式
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception ex) {
ex.printStackTrace();
}
pane = new JPanel();
button = new JButton("缩小到托盘");
button.setEnabled(false);
label = new JLabel("本操作系统不支持托盘");
pane.add(label);
pane.add(button);
//判断是否支持托盘
if (SystemTray.isSupported()) {
this.tray();
}
this.getContentPane().add(pane);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(300, 200);
this.setVisible(true);
}
/**
* 托盘相关代码
*/
private void tray() {
label.setText("本操作系统支持托盘");
button.setEnabled(true);
tray = SystemTray.getSystemTray(); // 获得本操作系统托盘的实例
//ImageIcon icon = new ImageIcon("tray.gif"); // 将要显示到托盘中的图标
ImageIcon icon = new ImageIcon("E://workspace//myeclipse66//ra//Tray//src//16.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("显示窗口");
MenuItem exit = new MenuItem("退出演示");
MenuItem author = new MenuItem("Author");
/**
* TrayIcon有三个构造
* TrayIcon(Image image) 用“图标”来构造
* TrayIcon(Image image, String tooltip) 用“图标”和“ToolTip”构造
* TrayIcon(Image image, String tooltip, PopupMenu popup) 用“图标”，“ToolTip”，“弹出菜单”来构造一个托盘图标
*/
trayIcon = new TrayIcon(icon.getImage(), "托盘技术演示", pop);
// 点击本按钮后窗口被关闭，托盘图标被添加到系统的托盘中
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent 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
} catch (AWTException ex) {
ex.printStackTrace();
}
}
});
/**
* 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
setVisible(true); // 显示窗口
}
}
});
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
setVisible(true); // 显示窗口
}
});
exit.addActionListener(new ActionListener() { // 点击“退出演示”菜单后推出程序
public void actionPerformed(ActionEvent e) {
System.exit(0); // 退出程序
}
});
author.addActionListener(new ActionListener() { // 点击“退出演示”菜单后推出程序
public void actionPerformed(ActionEvent e) {
showMessage();
}
});
pop.add(show);
pop.add(exit);
pop.add(author);
}
/**
* 显示信息
*/
private void showMessage() {
JOptionPane.showMessageDialog(this, new JLabel("这是一个系统托盘"), "消息", JOptionPane.INFORMATION_MESSAGE);
}
public static void main(String[] args) {
new TrayByJdk();
}
}