关于时间的问题

Question

忘了说了，第一个System是正确的

Answer 1

Calendar cal = Calendar.getInstance();

cal.roll(Calendar.MONTH,-2);
int year = cal.get(Calendar.DAY_OF_WEEK_IN_MONTH);
int month = cal.get(Calendar.MONTH)+1;
int day = cal.get(Calendar.DATE);

Answer 2

int year = cal.get(Calendar.YEAR);

Answer 3

import java.util.*Calendar cal = Calendar.getInstance();
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH)+1;
int day = cal.get(Calendar.DATE);