[threeten-dev] era formatting and era.getText(...)

[Xueming Shen]

It appears the Era formatting and Era.getText(...) never works
as expected (DateTimeTextProvider does not suport Era field),
so following code gives you numeric value of each era.

        Locale locale = Locale.JAPANESE;

         ChronoLocalDate<JapaneseChrono> cld = JapaneseChrono.INSTANCE.date(LocalDateTime.now());
         DateTimeFormatter fmt = new DateTimeFormatterBuilder()
                               .appendLocalized(FormatStyle.FULL, null, JapaneseChrono.INSTANCE)
                               .toFormatter(locale);

         System.out.println(cld);
         System.out.println(fmt.print(cld));
         System.out.println(DateTimeFormatters.pattern("GGGG").withLocale(locale).print(cld));


         //for (Era era : ISOChrono.INSTANCE.eras()) {
         for (Era era : JapaneseChrono.INSTANCE.eras()) {
             System.out.printf("%s  -> %s%n", era.toString(), era.getText(TextStyle.FULL, locale));
         }

Here is the webrev to make it work

http://cr.openjdk.java.net/~sherman/jdk8_threeten/era/

DateTimeTextProvider can be consolidated later, probably goes to
CalendarDateUtilities directly...

Parser still does not work as we don't have a "chrono" in parser context, yet.

-Sherman