if (scale < 0) throw new NumberFormatException ("scale of " + scale + " is < 0"); this.intVal = num; this.scale = scale;
this (num, 0);
  public BigDecimal (BigInteger num, int scale) throws NumberFormatException   {    if (scale < 0)       throw new NumberFormatException ("scale of " + scale + " is < 0");    this.intVal = num;    this.scale = scale;  }