Mega Code Archive
This program demonstrates the system tray API
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.AWTException;
import java.awt.Image;
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.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import javax.swing.Timer;
/**
* This program demonstrates the system tray API.
*
* @version 1.00 2007-09-22
* @author Cay Horstmann
*/
public class SystemTrayTest {
public static void main(String[] args) {
final TrayIcon trayIcon;
if (!SystemTray.isSupported()) {
System.err.println("System tray is not supported.");
return;
}
SystemTray tray = SystemTray.getSystemTray();
Image image = Toolkit.getDefaultToolkit().getImage("cookie.png");
PopupMenu popup = new PopupMenu();
MenuItem exitItem = new MenuItem("Exit");
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
popup.add(exitItem);
trayIcon = new TrayIcon(image, "Your Fortune", popup);
trayIcon.setImageAutoSize(true);
trayIcon.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
trayIcon.displayMessage("How do I turn this off?",
"Right-click on the fortune cookie and select Exit.", TrayIcon.MessageType.INFO);
}
});
try {
tray.add(trayIcon);
} catch (AWTException e) {
System.err.println("TrayIcon could not be added.");
return;
}
final List<String> fortunes = readFortunes();
Timer timer = new Timer(10000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
int index = (int) (fortunes.size() * Math.random());
trayIcon.displayMessage("Your Fortune", fortunes.get(index), TrayIcon.MessageType.INFO);
}
});
timer.start();
}
private static List<String> readFortunes() {
List<String> fortunes = new ArrayList<String>();
try {
Scanner in = new Scanner(new File("fortunes"));
StringBuilder fortune = new StringBuilder();
while (in.hasNextLine()) {
String line = in.nextLine();
if (line.equals("%")) {
fortunes.add(fortune.toString());
fortune = new StringBuilder();
} else {
fortune.append(line);
fortune.append(' ');
}
}
} catch (IOException ex) {
ex.printStackTrace();
}
return fortunes;
}
}
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