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