使用java的AWT或者swing来做任务栏菜单

JDK 6以后能够采用awt的SystemTray实现任务栏菜单，里面可以放入java.awt.PopupMenu，没有对swing的JPopupMenu的支持，不过找了一下，也有人实现了JPopupMenu的任务栏菜单

1. 基于awt的
package com.gomt.taskTray;

import java.awt.AWTException;
import java.awt.CheckboxMenuItem;
import java.awt.Image;
import java.awt.Menu;
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.ItemEvent;
import java.awt.event.ItemListener;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TrayIconDemo {
public static void main(String[] args) {
/* Use an appropriate Look and Feel */
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
//UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
} catch (UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
} catch (InstantiationException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
/* Turn off metal's use of bold fonts */
UIManager.put("swing.boldMetal", Boolean.FALSE);
//Schedule a job for the event-dispatching thread:
//adding TrayIcon.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}

private static void createAndShowGUI() {
//Check the SystemTray support
if (!SystemTray.isSupported()) {
System.out.println("SystemTray is not supported");
return;
}
final PopupMenu popup = new PopupMenu();
final TrayIcon trayIcon =
new TrayIcon(createImage("bulb.gif", "tray icon"));
final SystemTray tray = SystemTray.getSystemTray();

// Create a popup menu components
MenuItem aboutItem = new MenuItem("About");
CheckboxMenuItem cb1 = new CheckboxMenuItem("Set auto size");
CheckboxMenuItem cb2 = new CheckboxMenuItem("Set tooltip");
Menu displayMenu = new Menu("Display");
MenuItem errorItem = new MenuItem("Error");
MenuItem warningItem = new MenuItem("Warning");
MenuItem infoItem = new MenuItem("Info");
MenuItem noneItem = new MenuItem("None");
MenuItem exitItem = new MenuItem("Exit");

//Add components to popup menu
popup.add(aboutItem);
popup.addSeparator();
popup.add(cb1);
popup.add(cb2);
popup.addSeparator();
popup.add(displayMenu);
displayMenu.add(errorItem);
displayMenu.add(warningItem);
displayMenu.add(infoItem);
displayMenu.add(noneItem);
popup.add(exitItem);

trayIcon.setPopupMenu(popup);

try {
tray.add(trayIcon);
} catch (AWTException e) {
System.out.println("TrayIcon could not be added.");
return;
}

trayIcon.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"This dialog box is run from System Tray");
}
});

aboutItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"This dialog box is run from the About menu item");
}
});

cb1.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int cb1Id = e.getStateChange();
if (cb1Id == ItemEvent.SELECTED){
trayIcon.setImageAutoSize(true);
} else {
trayIcon.setImageAutoSize(false);
}
}
});

cb2.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
int cb2Id = e.getStateChange();
if (cb2Id == ItemEvent.SELECTED){
trayIcon.setToolTip("Sun TrayIcon");
} else {
trayIcon.setToolTip(null);
}
}
});

ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
MenuItem item = (MenuItem)e.getSource();
//TrayIcon.MessageType type = null;
System.out.println(item.getLabel());
if ("Error".equals(item.getLabel())) {
//type = TrayIcon.MessageType.ERROR;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an error message", TrayIcon.MessageType.ERROR);

} else if ("Warning".equals(item.getLabel())) {
//type = TrayIcon.MessageType.WARNING;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is a warning message", TrayIcon.MessageType.WARNING);

} else if ("Info".equals(item.getLabel())) {
//type = TrayIcon.MessageType.INFO;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an info message", TrayIcon.MessageType.INFO);

} else if ("None".equals(item.getLabel())) {
//type = TrayIcon.MessageType.NONE;
trayIcon.displayMessage("Sun TrayIcon Demo",
"This is an ordinary message", TrayIcon.MessageType.NONE);
}
}
};

errorItem.addActionListener(listener);
warningItem.addActionListener(listener);
infoItem.addActionListener(listener);
noneItem.addActionListener(listener);

exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tray.remove(trayIcon);
System.exit(0);
}
});
}

//Obtain the image URL
protected static Image createImage(String path, String description) {
URL imageURL = TrayIconDemo.class.getResource(path);

if (imageURL == null) {
System.err.println("Resource not found: " + path);
return null;
} else {
return (new ImageIcon(imageURL, description)).getImage();
}
}
}


********************************************************
2. 基于swing的
package com.gomt.taskTray;

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Image;
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.geom.Ellipse2D;
import java.awt.image.BufferedImage;

import javax.swing.JDialog;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;

public class JXTrayIcon extends TrayIcon {
private JPopupMenu menu;
private static JDialog dialog;
static {
dialog = new JDialog((Frame) null, "TrayDialog");
dialog.setUndecorated(true);
dialog.setAlwaysOnTop(true);
}

private static PopupMenuListener popupListener = new PopupMenuListener() {
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
}

public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
dialog.setVisible(false);
}

public void popupMenuCanceled(PopupMenuEvent e) {
dialog.setVisible(false);
}
};


public JXTrayIcon(Image image) {
super(image);
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
showJPopupMenu(e);
}

public void mouseReleased(MouseEvent e) {
showJPopupMenu(e);
}
});
}

private void showJPopupMenu(MouseEvent e) {
if (e.isPopupTrigger() && menu != null) {
Dimension size = menu.getPreferredSize();
dialog.setLocation(e.getX(), e.getY() - size.height);
dialog.setVisible(true);
menu.show(dialog.getContentPane(), 0, 0);
// popup works only for focused windows
dialog.toFront();
}
}

public JPopupMenu getJPopupMenu() {
return menu;
}

public void setJPopupMenu(JPopupMenu menu) {
if (this.menu != null) {
this.menu.removePopupMenuListener(popupListener);
}
this.menu = menu;
menu.addPopupMenuListener(popupListener);
}

private static void createGui() {
JXTrayIcon tray = new JXTrayIcon(createImage());
tray.setJPopupMenu(createJPopupMenu());
try {
SystemTray.getSystemTray().add(tray);
} catch (AWTException e) {
e.printStackTrace();
}
}

public static void main(String[] args) throws Exception {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

SwingUtilities.invokeLater(new Runnable() {
public void run() {
createGui();
}
});
}

static Image createImage() {
BufferedImage i = new BufferedImage(32, 32, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) i.getGraphics();
g2.setColor(Color.RED);
g2.fill(new Ellipse2D.Float(0, 0, i.getWidth(), i.getHeight()));
g2.dispose();
return i;
}

static JPopupMenu createJPopupMenu() {
final JPopupMenu m = new JPopupMenu();
m.add(new JMenuItem("Item 1"));
m.add(new JMenuItem("Item 2"));
JMenu submenu = new JMenu("Submenu");
submenu.add(new JMenuItem("item 1"));
submenu.add(new JMenuItem("item 2"));
submenu.add(new JMenuItem("item 3"));
m.add(submenu);
JMenuItem exitItem = new JMenuItem("Exit");
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
m.add(exitItem);
return m;
}
}