Calendar.roll() questions

[Rick Crawford]

Hello all. I've got a question / problem using Calendar.roll(). It's probably just me understanding how things work (usually is), but before I code a workaround, I want to make sure I'm doing this right. What I'm trying to do is take an input date, then advance it by a certain number of months.
For example:

import java.util.*;
public class CalendarTest {
public static void main(String[] args) {
Calendar c = new GregorianCalendar();
java.text.SimpleDateFormat linkDateFormatter = new java.text.SimpleDateFormat("yyyy-MM-dd");
for (int i = 0; i < 15; i++) {
c.roll(Calendar.MONTH,1);
System.out.println(linkDateFormatter.format(c.getTime()));
}
}
}

Here's the output, based on the current date of 2002-03-26:

2002-04-26
2002-05-26
2002-06-26
2002-07-26
2002-08-26
2002-09-26
2002-10-26
2002-11-26
2002-12-26
2002-01-26
2002-02-26
2002-03-26
2002-04-26
2002-05-26
2002-06-26

But what I REALLY want to see is this:

2002-04-26
2002-05-26
2002-06-26
2002-07-26
2002-08-26
2002-09-26
2002-10-26
2002-11-26
2002-12-26
2003-01-26
2003-02-26
2003-03-26
2003-04-26
2003-05-26
2003-06-26

..where the year is also incremented by adding one month each time once January is reached.
My question is, will I have to explicitly code for this: check to see if we're currently up to December, then increment the month AND year?
Thanks,
Rick <><

[Jim Yingst]

If you check the API for roll(), you will find that it explicitly states that larger fields will not be changed. (I.e. the year will remain constant while rolling months.) Try using add() instead.

[Rick Crawford]

Awesome! Works like a champ!
Thanks for the help,
Rick <><