Java Swing Tutorial - Java SystemTray .addPropertyChangeListener (String propertyName, PropertyChangeListener listener)

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Syntax

SystemTray.addPropertyChangeListener(String propertyName, PropertyChangeListener listener) has the following syntax.

public void addPropertyChangeListener(String propertyName,    PropertyChangeListener listener)

Example

In the following code shows how to use SystemTray.addPropertyChangeListener(String propertyName, PropertyChangeListener listener) method.

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
/*w w w .j a  va 2 s  .  c o m*/
public class Main {
  public static void main(String[] args) throws Exception {
    if (!SystemTray.isSupported()) {
      return;
    }
    SystemTray tray = SystemTray.getSystemTray();

    PropertyChangeListener pcl;
    pcl = new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent pce) {
        System.out.println("Property changed = " + pce.getPropertyName());
        TrayIcon[] tia = (TrayIcon[]) pce.getOldValue();
        if (tia != null) {
          for (int i = 0; i < tia.length; i++)
            System.out.println(tia[i]);
        }

        tia = (TrayIcon[]) pce.getNewValue();
        if (tia != null) {
          for (int i = 0; i < tia.length; i++)
            System.out.println(tia[i]);
        }
      }
    };
    tray.addPropertyChangeListener("trayIcons", pcl);

    Dimension size = tray.getTrayIconSize();
    BufferedImage bi = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
    Graphics g = bi.getGraphics();

    g.setColor(Color.blue);
    g.fillRect(0, 0, size.width, size.height);
    TrayIcon icon = null;
    tray.add(icon = new TrayIcon(bi));

    Thread.sleep(3000);
    tray.remove(icon);

    Thread.sleep(3000);
    System.exit(0);
  }

}

The code above generates the following result.

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