A bizarre phenomenon in my java program

Question

I found a bizarre phenomenon in my java program at runtime, just look at my code:

System.out.println(" date " + new Date(1359931355141L).toGMTString() );

the output by this statement was "date 3 Feb 2013 22:42:35 GMT", and

System.out.println(" date " + new Date(1359931355141L).getDate() );

the output by this was "date 4" , see, why not 3 here ???

I could not figure out what's wrong with my program; I am doubting whether my JVM ran into bugs.
Guys, would you like to have a test on your JVM for this two statements?

What is the timezone for the machine you ran this program on? — mthmulders, Jul 11 '13 at 12:32
Where are you? If time was 22:42 GMT, Spain is GMT+1, but now we are +2 because of summer time, so here that same moment was 00:42 of the next day — Pablo Lozano, Jul 11 '13 at 12:33

score 12 · Accepted Answer · answered Jul 11 '13 at 12:32

Because you live east of central Europe (in a timezone that is at least GMT+1.5Hr).

getDate() (which is deprecated btw) returns the day of the month, and it's returning 4 (instead of 3) because in your timezone, that epoch time is already into the next day, whereas in England (GMT) it's still day 3 of the month.

score 1 · Answer 2 · answered Jul 11 '13 at 12:32

1

What's your locale? If it's 3 Feb 2013 22:42:35 GMT but your locale is GMT+10 then your local date will be 4. Nothing bizzare at all, this is the expected behavior

answered Jul 11 '13 at 12:32

gerrytan

40,313
9
84
99

score 0 · Answer 3 · answered Jul 11 '13 at 12:34

0

Well. that depends on what your current locale is. GMT will give you time if GMT timezone. getDate will give you time of your locale.

answered Jul 11 '13 at 12:34

Adi

2,364
1
17
23

A bizarre phenomenon in my java program

3 Answers3