if (defaultComponent != null)
  public void downFocusCycle (Container cont)  {    if (cont == null)      return;    if (cont.isFocusCycleRoot (cont))      {        FocusTraversalPolicy policy = cont.getFocusTraversalPolicy ();        Component defaultComponent = policy.getDefaultComponent (cont);        defaultComponent.requestFocusInWindow ();        setGlobalCurrentFocusCycleRoot (cont);      }  }