Java Code:
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tray;
import org.eclipse.swt.widgets.TrayItem;

public class Snippet143 {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    Image image = new Image(display, 16, 16);
    final Tray tray = display.getSystemTray();
    if (tray == null) {
      System.out.println("The system tray is not available");
    } else {
      final TrayItem item = new TrayItem(tray, SWT.NONE);
      item.setToolTipText("SWT TrayItem");
      item.addListener(SWT.Show, new Listener() {
        public void handleEvent(Event event) {
          System.out.println("show");
        }
      });
      item.addListener(SWT.Hide, new Listener() {
        public void handleEvent(Event event) {
          System.out.println("hide");
        }
      });
      item.addListener(SWT.Selection, new Listener() {
        public void handleEvent(Event event) {
          System.out.println("selection");
        }
      });
      item.addListener(SWT.DefaultSelection, new Listener() {
        public void handleEvent(Event event) {
          System.out.println("default selection");
        }
      });
      final Menu menu = new Menu(shell, SWT.POP_UP);
      for (int i = 0; i < 8; i++) {
        MenuItem mi = new MenuItem(menu, SWT.PUSH);
        mi.setText("Item" + i);
      }
      item.addListener(SWT.MenuDetect, new Listener() {
        public void handleEvent(Event event) {
          menu.setVisible(true);
        }
      });
      item.setImage(image);
    }
    shell.setBounds(50, 50, 300, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    image.dispose();
    display.dispose();
  }
}