This example shows us how to roll through monrhs (without changing year) or hrs(without changing month or year) using roll() method of Class calender.
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() );
}
}
Result:
The above code sample will produce the following result.
today is Mon Jun 22 02:44:36 IST 2009
date after a month will be Thu Oct 22 02:44:36 IST 2009
date after 7 hrs will be Thu Oct 22 00:44:36 IST 2009