SystemTrayTest.java Source code

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Here is the source code for SystemTrayTest.java

Source

/*
 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;
    }

}