code: private final void copyMembers(DateFormatSymbols src, DateFormatSymbols dst)
      {
          dst.eras = Arrays.copyOf(src.eras, src.eras.length);
          dst.months = Arrays.copyOf(src.months, src.months.length);
          dst.shortMonths = Arrays.copyOf(src.shortMonths, src.shortMonths.length);
          dst.weekdays = Arrays.copyOf(src.weekdays, src.weekdays.length);
          dst.shortWeekdays = Arrays.copyOf(src.shortWeekdays, src.shortWeekdays.length);
          dst.ampms = Arrays.copyOf(src.ampms, src.ampms.length);
          if (src.zoneStrings != null) {
              dst.zoneStrings = src.getZoneStringsImpl(true);
          } else {
              dst.zoneStrings = null;
          }
          dst.localPatternChars = src.localPatternChars;
  
          dst.tinyMonths = src.tinyMonths;
          dst.tinyWeekdays = src.tinyWeekdays;
  
          dst.standAloneMonths = src.standAloneMonths;
          dst.shortStandAloneMonths = src.shortStandAloneMonths;
          dst.tinyStandAloneMonths = src.tinyStandAloneMonths;
  
          dst.standAloneWeekdays = src.standAloneWeekdays;
          dst.shortStandAloneWeekdays = src.shortStandAloneWeekdays;
          dst.tinyStandAloneWeekdays = src.tinyStandAloneWeekdays;
      }
docs: Clones all the data members from the source DateFormatSymbols to
  the target DateFormatSymbols. This is only for subclasses.
  @param src the source DateFormatSymbols.
  @param dst the target DateFormatSymbols.