怎样运用Java中的Calendar类来把半年的时间计算成毫秒！非常感谢！

Question

如题！
希望前辈们帮忙。
非常感激！

Answer 1

是半年的毫秒数用Calendar换算是吧Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, 1971);
c.set(Calendar.MONTH, 0);
c.set(Calendar.DAY_OF_YEAR, 0);
c.set(Calendar.HOUR, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
System.out.println(c.getTimeInMillis()/2);

Answer 2

import java.util.Calendar;public class Test {    public static void main(String[] args) {
        Calendar c = Calendar.getInstance();
        for(int i = Calendar.HOUR_OF_DAY; i <= Calendar.MILLISECOND; i++) {
            c.set(i, 0);
        }
        long t0 = c.getTimeInMillis();
        c.add(Calendar.MONTH, 6);
        long t1 = c.getTimeInMillis();
        System.out.println(t1 - t0);
    }
}