PrettyPrint.java 文件源码

public static String toAge(Date from, Date to) {
  if (from == null || to == null) return "N/A";
  final Period period = new Period(from.getTime(), to.getTime());
  DurationFieldType[] dtf = new ArrayList<DurationFieldType>() {{
    add(DurationFieldType.years()); add(DurationFieldType.months());
    add(DurationFieldType.days());
    if (period.getYears() == 0 && period.getMonths() == 0 && period.getDays() == 0) {
      add(DurationFieldType.hours());
      add(DurationFieldType.minutes());
    }

  }}.toArray(new DurationFieldType[0]);

  PeriodFormatter pf = PeriodFormat.getDefault();
  return pf.print(period.normalizedStandard(PeriodType.forFields(dtf)));
}