Incrementing a java.util.Date by one day

Question

What is the correct way to increment a java.util.Date by one day.

I'm thinking something like

        Calendar cal = Calendar.getInstance();
        cal.setTime(toDate);
        cal.add(Calendar.DATE, 1);
        toDate = cal.getTime();

It doesn't 'feel' right.

Answer 1

That would work.

It doesn't 'feel' right.

If it is the verbosity that bothers you, welcome to the Java date-time API :-)

Answer 2

Yeah, that's right. Java Date APIs feel wrong quite often. I recommend you try Joda Time. It would be something like:

DateTime startDate = ...
DateTime endDate = startDate.plusDays(1);

or:

Instant start = ...
Instant end = start.plus(Days.days(1).toStandardDuration());

Answer 3

I believe joda time library makes it much more clean to work with dates.

Answer 4

Here's how I do it:

Date someDate = new Date(); // Or whatever    
Date dayAfter = new Date(someDate.getTime()+(24*60*60*1000));

Where the math at the end converts a day's worth of seconds to milliseconds.

Answer 5

If you do not like the math in the solution from Tony Ennis

Date someDate = new Date(); // Or whatever
Date dayAfter = new Date(someDate.getTime() + TimeUnit.DAYS.toMillis( 1 ));