private void withLeadingZeros(int value, int length, StringBuffer buffer)
private void withLeadingZeros(int value, int length, FormatBuffer buffer)
  private void withLeadingZeros(int value, int length, StringBuffer buffer)   {    String valStr = String.valueOf(value);    for (length -= valStr.length(); length > 0; length--)      buffer.append('0');    buffer.append(valStr);  }