How to set System tray icon in swing

SystemTray tray = SystemTray.getSystemTray();
Image ico = Toolkit.getDefaultToolkit().getImage("services_gen.gif");
TrayIcon tric=new TrayIcon(ico, "NEWS",popup);
try
{
tray.add(tric);
}
catch (AWTException ex)
{
System.out.println(ex);
}