Java.util.GregorianCalendar.add() 方法

package com.codingdict;

import java.util.*;

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

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());

      // add 2 months
      cal.add((GregorianCalendar.MONTH), 2);

      // print the modified date and time
      System.out.println("" + cal.getTime());

      // add 2 years
      cal.add((GregorianCalendar.YEAR), 2);

      // print the modified date and time
      System.out.println("" + cal.getTime());
   }
}