Is there a good way to get the date of the coming Wednesday?

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The basic algorithm is the following:

  • Get the current date
  • Get its day of week
  • Find its difference with Wednesday
  • If the difference is not positive, add 7 (i.e. insist on next coming/future date)
  • Add the difference

Here’s a snippet to show how to do this with java.util.Calendar:

import java.util.Calendar;

public class NextWednesday {
    public static Calendar nextDayOfWeek(int dow) {
        Calendar date = Calendar.getInstance();
        int diff = dow - date.get(Calendar.DAY_OF_WEEK);
        if (diff <= 0) {
            diff += 7;
        }
        date.add(Calendar.DAY_OF_MONTH, diff);
        return date;
    }
    public static void main(String[] args) {
        System.out.printf(
            "%ta, %<tb %<te, %<tY",
            nextDayOfWeek(Calendar.WEDNESDAY)
        );
    }
}

Relative to my here and now, the output of the above snippet is "Wed, Aug 18, 2010".

API links

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