return; }
else notifyCondition = s;
  private void notifyMenuItem_actionPerformed() {    String s =       (String)JOptionPane.showInputDialog(this,                                          "Notify if any node writes:",                                          "Notification",                                          JOptionPane.QUESTION_MESSAGE,                                          null, null, notifyCondition);    if (s == null || s.length() == 0) {      notifyCondition = null;      return;    }    Collection c = nodeListeners.values();    for (Iterator i = c.iterator(); i.hasNext(); )      ((ConsoleNodeListener)i.next()).setNotifyCondition(s);    notifyCondition = s;  }