Calendar 正確使用

public static void main(string args) {

calendar cal = calendar.getinstance();

cal.settime(new date());

//當前年

int year = cal.get(calendar.year);

//當前月

int month = (cal.get(calendar.month))+1;

//當前月的第幾天：即當前日

int day_of_month = cal.get(calendar.day_of_month);

//當前時：hour_of_day-24小時制；hour-12小時制

int hour = cal.get(calendar.hour_of_day);

//當前分

int minute = cal.get(calendar.minute);

//當前秒

int second = cal.get(calendar.second);

//0-上午；1-下午

int ampm = cal.get(calendar.am_pm);

//當前年的第幾周

int week_of_year = cal.get(calendar.week_of_year);

//當前月的第幾周

int week_of_month = cal.get(calendar.week_of_month);

//當前年的第幾天

int day_of_year = cal.get(calendar.day_of_year);

system.out.println("當前年==/t"+year);

system.out.println("當前月==/t"+month);

system.out.println("當前月的第幾天：即當前日===/t"+day_of_month);

system.out.println("當前時hour_of_day-24小時制；hour-12小時制===/t"+hour);

system.out.println("當前分===/t"+minute);

system.out.println("當前分===/t"+second);

system.out.println("0-上午；1-下午==/t"+ampm);

system.out.println("當前年的第幾周/t"+week_of_year);

system.out.println("當前月的第幾周/t"+week_of_month);

system.out.println("當前年的第幾天/t"+day_of_year);

calendar cal1 = calendar.getinstance();

date date=new date();

cal1.settime(date);

calendar cal2 = calendar.getinstance();

cal2.settime(date);

system.out.println(cal1.get(calendar.year)-cal2.get(calendar.year));

system.out.println(cal1.get(calendar.month)-cal2.get(calendar.month));

system.out.println(cal1.get(calendar.month));

system.out.println(cal1.get(calendar.year));

system.out.println(cal1.get(calendar.month)-cal2.get(calendar.year));

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