1. DateTimeFormatter format = DateTimeFormatter.ofPattern("MMM d yyyy  hh:mm a");
    3.         // Leaving from San Francisco on July 20, 2013, at 7:30 p.m.
    4.         // 出发时间，旧金山（和洛杉矶一个时区？），此时不包含时区信息
    5.         LocalDateTime leaving = LocalDateTime.of(2013, Month.JULY, 20, 19, 30);
    6.         ZoneId leavingZone = ZoneId.of("America/Los_Angeles"); 
    7.         //包含洛杉矶时区信息的出发时间
    8.         ZonedDateTime departure = ZonedDateTime.of(leaving, leavingZone);
    10.         try {
    11.             String out1 = departure.format(format);
    12.             System.out.printf("LEAVING:  %s (%s)%n", out1, leavingZone);
    13.         } catch (DateTimeException exc) {
    14.             System.out.printf("%s can't be formatted!%n", departure);
    15.             throw exc;
    16.         }
    18.         // Flight is 10 hours and 50 minutes, or 650 minutes
    19.         // 航班历时10小时50分钟，或者换算成650分钟
    20.         ZoneId arrivingZone = ZoneId.of("Asia/Tokyo"); 
    21.         //计算出东京时区降落时的时间
    22.         ZonedDateTime arrival = departure.withZoneSameInstant(arrivingZone)
    23.                                          .plusMinutes(650);
    26.         try {
    27.             String out2 = arrival.format(format);
    28.             System.out.printf("ARRIVING: %s (%s)%n", out2, arrivingZone);
    29.         } catch (DateTimeException exc) {
    30.             System.out.printf("%s can't be formatted!%n", arrival);
    31.             throw exc;
    32.         }
    34.         if (arrivingZone.getRules().isDaylightSavings(arrival.toInstant())) 
    35.             System.out.printf("  (%s daylight saving time will be in effect.)%n",
    36.                               arrivingZone);
    37.         else
    38.             System.out.printf("  (%s standard time will be in effect.)%n",
    39.                               arrivingZone);