Java日历Calendar各种方法

package com.codingdict;
import java.util.Calendar;

public class CalendarDemo {
   public static void main(String[] args) {

      // create a calendar
      Calendar cal = Calendar.getInstance();

      // print current date
      System.out.println("The current date is : " + cal.getTime());

      // add 20 days to the calendar
      cal.add(Calendar.DATE, 20);
      System.out.println("20 days later: " + cal.getTime());

      // subtract 2 months from the calendar
      cal.add(Calendar.MONTH, -2);
      System.out.println("2 months ago: " + cal.getTime());

      // subtract 5 year from the calendar
      cal.add(Calendar.YEAR, -5);
      System.out.println("5 years ago: " + cal.getTime());
   }
}