Java: Customize adding 1 month to the current date

Question

I\'ve read around and basically I\'ve figured out that the Calendar object is capable of adding 1 month to a date specified by using something like:

Calendar         


        

Answer 1

It looks like you want the calendar to roll up to the beginning of the next month if the date of the next month is smaller than the date of the month before it. Here's how we'd do that:

Calendar cal = Calendar.getInstance();
int oldDay = cal.get(DAY_OF_MONTH);
cal.add(Calendar.MONTH, 1);

// If the old DAY_OF_MONTH was larger than our new one, then
// roll over to the beginning of the next month.
if(oldDay > cal.get(DAY_OF_MONTH){
  cal.add(Calendar.MONTH, 1);
  cal.set(Calendar.DAY, 1);
}