Question

I have a Date object (java.sql.Date). I need to get 12 at night of that day. So I can create a time period from current time to end of the day.

How can I calculate that time with java.sql.Date. Please send me an example.

Answer 1

Ideally, use Joda Time which is a much better date and time API than the one in Java.

java.sql.Date sqlDate = ...;
LocalDate date = new LocalDate(sqlDate.getTime(), DateTimeZone.UTC);
LocalDate tomorrow = date.plusDays(1);

DateTime startOfDay = tomorrow.toDateTimeAtStartOfDay(DateTimeZone.UTC);

java.sql.Date sqlTomorrow = new java.sql.Date(startOfDay.getMillis());

Note that this assumes UTC everywhere… whereas I suspect you want midnight local time in which case you’ll need to specify the time zone. Also note that midnight doesn’t always occur on every day in all time zones due to daylight saving time – the above code will give you the start of the day instead.