源码如下import java.util.*;

public class showdate {

public static void main(string[] args) {
calendar calendar = new gregoriancalendar();
date trialtime = new date();
calendar.settime(trialtime);

// print out a bunch of interesting things
system.out.println("era: " + calendar.get(calendar.era));
system.out.println("year: " + calendar.get(calendar.year));
system.out.println("month: " + calendar.get(calendar.month));
system.out.println("week_of_year: " + calendar.get(calendar.week_of_year));
system.out.println("week_of_month: " + calendar.get(calendar.week_of_month));
system.out.println("date: " + calendar.get(calendar.date));
system.out.println("day_of_month: " + calendar.get(calendar.day_of_month));
system.out.println("day_of_year: " + calendar.get(calendar.day_of_year));
system.out.println("day_of_week: " + calendar.get(calendar.day_of_week));
system.out.println("day_of_week_in_month: " + calendar.get(calendar.day_of_week_in_month));
system.out.println("am_pm: " + calendar.get(calendar.am_pm));
system.out.println("hour: " + calendar.get(calendar.hour));
system.out.println("hour_of_day: " + calendar.get(calendar.hour_of_day));
system.out.println("minute: " + calendar.get(calendar.minute));
system.out.println("second: " + calendar.get(calendar.second));
system.out.println("millisecond: " + calendar.get(calendar.millisecond));
system.out.println("zone_offset: " + (calendar.get(calendar.zone_offset)/(60*60*1000)));
system.out.println("dst_offset: " + (calendar.get(calendar.dst_offset)/(60*60*1000)));

system.out.println("current time, with hour reset to 3");
calendar.clear(calendar.hour_of_day); // so doesn't override
calendar.set(calendar.hour, 3);
system.out.println("era: " + calendar.get(calendar.era));
system.out.println("year: " + calendar.get(calendar.year));
system.out.println("month: " + calendar.get(calendar.month));
system.out.println("week_of_year: " + calendar.get(calendar.week_of_year));
system.out.println("week_of_month: " + calendar.get(calendar.week_of_month));
system.out.println("date: " + calendar.get(calendar.date));
system.out.println("day_of_month: " + calendar.get(calendar.day_of_month));
system.out.println("day_of_year: " + calendar.get(calendar.day_of_year));
system.out.println("day_of_week: " + calendar.get(calendar.day_of_week));
system.out.println("day_of_week_in_month: " + calendar.get(calendar.day_of_week_in_month));
system.out.println("am_pm: " + calendar.get(calendar.am_pm));
system.out.println("hour: " + calendar.get(calendar.hour));
system.out.println("hour_of_day: " + calendar.get(calendar.hour_of_day));
system.out.println("minute: " + calendar.get(calendar.minute));
system.out.println("second: " + calendar.get(calendar.second));
system.out.println("millisecond: " + calendar.get(calendar.millisecond));
system.out.println("zone_offset: " + (calendar.get(calendar.zone_offset)/(60*60*1000))); // in hours
system.out.println("dst_offset: " + (calendar.get(calendar.dst_offset)/(60*60*1000))); // in hours
}

}