MANIPULER LA BARRE SYSTEME

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;

public class Demo1 {

	public static void main(String[] args) {
		final TrayIcon trayIcon; // Notre icone dans la barre système
		
		// On vérifie que le support de la feature du SystemTray est compatible avec l'OS hote
		if (SystemTray.isSupported()) {

		    SystemTray tray = SystemTray.getSystemTray();
		    Image image = Toolkit.getDefaultToolkit().getImage("duke.gif"); // On récupère l'image qui nous servira d'icone
		            
		    PopupMenu popup = new PopupMenu(); // Notre menu (clic droit sur l'icone systray)
		    
		    MenuItem defaultItem = new MenuItem("Quitter");
		    defaultItem.addActionListener(new ActionListener() {
		        public void actionPerformed(ActionEvent e) {
		            System.exit(0);
		        }
		    });
		    popup.add(defaultItem);

		    trayIcon = new TrayIcon(image, "Java 6 Demo !", popup); // Création de l'icone systray

		    ActionListener actionListener = new ActionListener() {
		        public void actionPerformed(ActionEvent e) {
		            trayIcon.displayMessage("Java 6 new feature !", 
		                "Le System Tray en action !",
		                TrayIcon.MessageType.INFO);
		        }
		    };
		    trayIcon.setImageAutoSize(true);
		    trayIcon.addActionListener(actionListener);
		    
		    try {
		        tray.add(trayIcon);
		    } catch (AWTException e) {
		        e.printStackTrace();
		    }

		} else {
			// ...
		}
	}
}