impl.setOption (SocketOptions.SO_REUSEADDR, new Boolean (on));
impl.setOption (SocketOptions.SO_REUSEADDR, Boolean.valueOf(on));
  public void setReuseAddress (boolean on)    throws SocketException  {    if (isClosed())      throw new SocketException("ServerSocket is closed");        impl.setOption (SocketOptions.SO_REUSEADDR, new Boolean (on));  }