Error in the conversion of a date in ms for october before 1996

Question

Hi,
I have the following problems (using of the jdk 1.5.0_15)
One hour is systematicallay added when i ask to convert a date in millisecond for a date with first days of the month of october before 1996.
Unit test
try {
  SimpleDateFormat form = new SimpleDateFormat(
  "yyyy-MM-dd HH:mm:ss.S");
  Date date = form.parse("1995-09-06 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("810338400000");
  date = form.parse("1995-10-06 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("812930400000");
  date = form.parse("1995-10-30 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("815007600000");
  date = form.parse("1995-11-06 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("815612400000");
  date = form.parse("1996-10-06 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("844552800000");
  date = form.parse("1996-11-06 00:00:00.0");
  System.out.println(date.getTime());
  System.out.println("847234800000");
  } catch (Exception e) {
       e.printStackTrace();
A decalage appears for 1995-10-06 00:00:00.0, the result should be 812930400000 but 812934000000 (1 hour more) is retrieved.
Anyone has an idea what's happening?
sincerely

Answer 1

I have the following problems (using of the jdk 1.5.0_15)
One hour is systematicallay added when i ask to convert a date in millisecond for a date with first days of the month of october before 1996.
Why are you still using such an ancient version of Java?
There have been many changes to Timezone functionality since 2005 especially for Daylight Savings Time calculations.
At a minimum, you should update your Jave version with the latest timezone data. Get the TZUpdate tool and use it and then retest and post the results.
http://www.oracle.com/technetwork/java/javase/tzupdater-readme-136440.html
Here are two closely related links
http://www.oracle.com/technetwork/java/javase/dst-faq-138158.html
http://www.oracle.com/technetwork/java/javase/timezones-137583.html