this.pattern = pattern;
  public SimpleDateFormat(String pattern, Locale locale)   {    super();    calendar = new GregorianCalendar(locale);    computeCenturyStart();    tokens = new ArrayList();    formatData = new DateFormatSymbols(locale);    compileFormat(pattern);    this.pattern = pattern;    numberFormat = NumberFormat.getInstance(locale);    numberFormat.setGroupingUsed (false);    numberFormat.setParseIntegerOnly (true);    numberFormat.setMaximumFractionDigits (0);  }