Java Calendar getActualMinimum方法

package com.codingdict;

import java.util.*;

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

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

      // return the minimum value that the year field could have
      int i = cal.getActualMinimum(Calendar.YEAR);
      System.out.println("Minimum Year :"+ i);

      // returns the minimum value that the month field could have
      int a = cal.getActualMinimum(Calendar.MONTH);
      System.out.println("Minimum month :"+ a);
   }
}