/**
   * Removes the menu bar.
   *
   * @param m the menu bar
   * @exception NullPointerException if the java frame is null
   * @exception NullPointerException if the menu bar is null
   */
  public void removeMenuBar(MenuBar m) throws NullPointerException {

    javax.swing.JFrame f = (javax.swing.JFrame) getJavaObject();

    if (f != null) {

      if (m != null) {

        f.setJMenuBar(null);

      } else {

        throw new NullPointerException("Could not set menu bar. The menu bar is null.");
      }

    } else {

      throw new NullPointerException("Could not set menu bar. The java frame is null.");
    }
  }