static void javaSound_closeClipOnStop(final Clip clip) {
  javaSound_closeClipOnStop(clip, null);
}

static void javaSound_closeClipOnStop(final Clip clip, final Flag flag) {
  clip.addLineListener(new LineListener {
    public void update(LineEvent event) {
      if (event.getType() == LineEvent.Type.STOP) {
        print("javaSound closing clip");
        clip.close();
        if (flag != null) flag.raise();
      }
    }
  });
}