How to round time to the nearest quarter hour in java?

Question

Given today\'s time e.g. 2:24PM, how do I get it to round to 2:30PM?

Similarly if the time was 2:17PM, how do I get it to round to 2:15PM?

Answer 1

Wonderful post, thank you so much guys! It was exactly what I needed :)

Here's my code based on jour work.

My usecase is "Given it's 11:47 am, I want to set two dates symbolizing the current 5-minutes frame : 11:45 am and 11:50 am"

            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MILLISECOND, 0);

            int modulo = calendar.get(Calendar.MINUTE) % 5;
            if(modulo > 0) {

                calendar.add(Calendar.MINUTE, -modulo);
            }

            myObject.setStartDate(calendar.getTime());

            calendar.add(Calendar.MINUTE, 5);
            myObject.setDueDate(calendar.getTime());