return "GnuDSAPrivateKey: x=" + x.toString(16) + " p=" + p.toString(16) + " q=" + q.toString(16) + " g=" + g.toString(16);
return "GnuDSAPrivateKey: x=" + (x != null ? x.toString(16) : "null") + " p=" + (p != null ? p.toString(16) : "null") + " q=" + (q != null ? q.toString(16) : "null") + " g=" + (g != null ? g.toString(16) : "null");
  public String toString()  {    return "GnuDSAPrivateKey: x=" + x.toString(16) + " p=" + p.toString(16)      + " q=" + q.toString(16) + " g=" + g.toString(16);  }