Convert to unixtime: same input, different output

Question

Maybe this is a recurrent issue, but I need to explain my problem.

I must convert date+hour to Unix time format. I use Apache Commons Lang library, DateUtils class:

Date date = DateUtils.parseDate(strStartDateTime, new String[] { "ddMMyyyyHHmmss" });
Long dateLong = new Long(date.getTime());

Maybe Java Date class is old for this, but it seems to work fine.

But lately, I have detected that the same input, in right expected format, is returning different output in different executions.

I have been looking for a similar issue, and I have read that Java Date is old, joda-time library is recommended, etc.

It would be easy to convert with joda-time, but, why is this happening? Is reliable the code above? It's very likely I'm not taking something into account.

Any help or suggestion would be very appreciated. Thanks in advance.

Answer 1

Excuse me, but finally I found the error. There was a wrong attribute definition. It was my programming error; nothing related to time conversion. Thanks