.append("defaultFormat=").append(defaultFormat).append(",").append(ls)
  public String toString()  {    if (str == null)      {        String ls = SystemProperties.getProperty("line.separator");        str = new StringBuilder().append(ls)        .append("p=0x").append(p.toString(16)).append(",").append(ls)        .append("q=0x").append(q.toString(16)).append(",").append(ls)        .append("g=0x").append(g.toString(16))        .toString();      }    return str;  }