Resetting the time part of a timestamp in Java

Question

In Java, given a timestamp, how to reset the time part alone to 00:00:00 so that the timestamp represents the midnight of that particular day ?

In T-SQL, this query

Answer 1

I prefer this solution:

GregorianCalendar now = new GregorianCalendar();
GregorianCalendar calendar = new GregorianCalendar(
              now.get(GregorianCalendar.YEAR), now.get(GregorianCalendar.MONTH), 
              now.get(GregorianCalendar.DAY_OF_MONTH));