/**
   * Removes the resizable flag.
   *
   * @param r the resizable flag
   * @exception NullPointerException if the java frame is null
   * @exception NullPointerException if the resizable flag is null
   */
  public void removeResizable(Boolean r) throws NullPointerException {

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

    if (f != null) {

      if (r != null) {

        f.setResizable(Boolean.FALSE);

      } else {

        throw new NullPointerException("Could not set resizable flag. The resizable flag is null.");
      }

    } else {

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