修改文本框的关闭键的功能

 /** handler window event */
  @Override
  protected void processWindowEvent(final WindowEvent pEvent) {
    if (pEvent.getID() == WindowEvent.WINDOW_CLOSING) {
      // 在此加上你想要在关闭前的所有代码.
    } else {
      super.processWindowEvent(pEvent);
    }
  }