SWTでタスクトレイを制御したことある方がいらっしゃいましたら

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;

public class TrayExample {

   private final Shell shell;
   private final Image image;
   private final TrayItem trayItem;

   public static void main(String[] args) {
      Display display = new Display();
      TrayExample main = new TrayExample(display);
      Shell shell = main.open();

      while (!shell.isDisposed()) {
         if (!display.readAndDispatch()) {
            display.sleep();
         }
      }
      main.image.dispose();
      display.dispose();
   }

   public TrayExample(Display display) {
      shell = new Shell(display, SWT.TITLE | SWT.CLOSE);
      shell.setText("TrayExample");
      shell.setLayout(new FillLayout());
      shell.setSize(100, 100);
      
      Tray tray = display.getSystemTray();
      trayItem = new TrayItem(tray, SWT.NONE);
      image = new Image(display, "tray.gif"); // ← 適当なファイル名に…
      trayItem.setImage(image);
      trayItem.setToolTipText("test!");
      trayItem.addSelectionListener(new SelectionListener() {
         public void widgetSelected(SelectionEvent e) {
            System.out.println("widgetSelected");
         }

         public void widgetDefaultSelected(SelectionEvent e) {
            System.out.println("widgetDefaultSelected");
            shell.setVisible(true);
            trayItem.setVisible(false);
         }
      });
      
      Button button = new Button(shell, SWT.PUSH);
      button.setText("隠す(&H)");
      button.addSelectionListener(new SelectionAdapter() {
         public void widgetSelected(SelectionEvent e) {
            trayItem.setVisible(true);
            shell.setVisible(false);
         }
      });
   }
   private Shell open() {
      shell.open();
      return shell;
   }
}