InetAddress iaddr = new InetAddress(null, null);
InetAddress iaddr = new InetAddress(null, host);
  public static InetAddress getByName (String host)    throws UnknownHostException  {    if (host == null)      return getLocalHost();    byte[] address = aton(host);    if (address != null)      return new InetAddress(address, null);    InetAddress iaddr = new InetAddress(null, null);    lookup(host, iaddr, false);    return iaddr;  }