This program demonstrates the system tray API. : TrayIcon « JDK 6 « Java

1. Java
2. JDK 6
3. TrayIcon

This program demonstrates the system tray API.

 

/*
 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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