valid = Boolean.valueOf(DIGEST0.equals(Util.toString(new MD2().digest())));
String d = Util.toString(new MD2().digest()); valid = Boolean.valueOf(DIGEST0.equals(d));
  public boolean selfTest()  {    if (valid == null)      {        valid = Boolean.valueOf(DIGEST0.equals(Util.toString(new MD2().digest())));      }    return valid.booleanValue();  }