Java示例滚动时间和月份

import java.util.*;



public class Main {

   public static void main(String[] args) throws Exception {

      Date d1 = new Date();

      Calendar cl = Calendar. getInstance();



      cl.setTime(d1);

      System.out.println("today is "+ d1.toString());



      cl. roll(Calendar.MONTH, 100);

      System.out.println("date after a month will be " + cl.getTime().toString() );



      cl. roll(Calendar.HOUR, 70);

      System.out.println("date after 7 hrs will be "+ cl.getTime().toString() );

   }

}