Java Calendar hashCode方法

package com.codingdict;

import java.util.*;

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

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

      // display current calendar
      System.out.println("The current calendar shows: " + cal.getTime());

      // get the hash code and print it
      int i = cal.hashCode();
      System.out.println("A hash code for this calendar is: " + i);
   }
}