Why does setting date with calendar give me the wrong date

Question

I am setting the date to 2013-01-01 00:00:00, but the date comes out as Fri Feb 01 00:00:00 GMT+01:00 2013

Why?

Calendar calendar = Calendar.getInstance(         


        

Answer 1

Month numbering starts at 0 in Java's date classes. Use the month constants in the Calendar class to avoid this common mistake.

calendar.set(2013, Calendar.JANUARY, 1, 0, 0, 0);