Date: Tue, 30 May 2006 15:32:29 +0200 From: Heiko Weber <java@wecos.de> To: freebsd-java@freebsd.org Subject: Re: Calendar Question - maybe bug ? Message-ID: <200605301532.30185.java@wecos.de> In-Reply-To: <200605301000.35042.java@wecos.de> References: <200605291720.19793.java@wecos.de> <447BE408.8040504@ebs.gr> <200605301000.35042.java@wecos.de>
next in thread | previous in thread | raw e-mail | index | archive | help
Am Dienstag, 30. Mai 2006 10:00 schrieb Heiko Weber:
> Am Dienstag, 30. Mai 2006 08:19 schrieb Panagiotis Astithas:
> > Heiko Weber wrote:
> > > Hi !
> > >
> > > I've a problem with GregorianCalendar, which returns different weeks
> > > (in year) on FreeBSD 6.1, java version is
> > >
> > > # java -version
> > > Java HotSpot(TM) Server VM (build 1.5.0-p2-heiko_03_jan_2006_23_51,
> > > mixed mode)
> > >
> > > Test program (A.java):
> > >
> > > import java.util.Calendar;
> > > import java.util.GregorianCalendar;
> > >
> > > public class A {
> > > public static int weeksInYear(int year) {
> > > Calendar cal = GregorianCalendar.getInstance();
> > >
> > > cal.set(year, 11, 31);
> > >
> > > return cal.get(Calendar.WEEK_OF_YEAR) == 53 ? 53 : 52;
> > > }
> > >
> > > public static void main(String args[]) {
> > > for (int i = 1990; i <= 2006; i++)
> > > System.out.println("Weeks in Year " + i + " = "
> > > + weeksInYear(i));
> > > }
> > > }
> > >
> > > Output on a Linux or Windows JRE is:
> > >
> > > Weeks in Year 1990 = 52
> > > Weeks in Year 1991 = 52
> > > Weeks in Year 1992 = 53
> > > Weeks in Year 1993 = 52
> > > Weeks in Year 1994 = 52
> > > Weeks in Year 1995 = 52
> > > Weeks in Year 1996 = 52
> > > Weeks in Year 1997 = 52
> > > Weeks in Year 1998 = 53
> > > Weeks in Year 1999 = 52
> > > Weeks in Year 2000 = 52
> > > Weeks in Year 2001 = 52
> > > Weeks in Year 2002 = 52
> > > Weeks in Year 2003 = 52
> > > Weeks in Year 2004 = 53
> > > Weeks in Year 2005 = 52
> > > Weeks in Year 2006 = 52
> > >
> > > Output on FreeBSD is:
> > >
> > > Weeks in Year 1990 = 52
> > > Weeks in Year 1991 = 52
> > > Weeks in Year 1992 = 52
> > > Weeks in Year 1993 = 52
> > > Weeks in Year 1994 = 53
> > > Weeks in Year 1995 = 52
> > > Weeks in Year 1996 = 52
> > > Weeks in Year 1997 = 52
> > > Weeks in Year 1998 = 52
> > > Weeks in Year 1999 = 52
> > > Weeks in Year 2000 = 52
> > > Weeks in Year 2001 = 52
> > > Weeks in Year 2002 = 52
> > > Weeks in Year 2003 = 52
> > > Weeks in Year 2004 = 52
> > > Weeks in Year 2005 = 53
> > > Weeks in Year 2006 = 52
> > >
> > > Is this my fault or would it help to update the FreeBSD JRE ? Or is the
> > > java-Calendar-System build up on some local (changeable) settings ?
> > >
> > > Thanks for any help or hint.
> >
> > I can't replicate this here on either diablo-jdk15 or jdk15 patchset 2
> > (as yours). Is your systems time/timezone/etc. correct?
>
> Hm, /etc/localtime has been installed last year in september - from
> installation of FreeBSD 6.0. If I remember correct I used sysinstall and
> answered "cmos time == local time".
>
> # date
> Tue May 30 09:48:36 CEST 2006
>
> Is this ok for germany ?
>
> At the moment I compile jdk with patchset 3 on an other FreeBSD system to
> verify ... there I can play with the timezone settings after installation.
>
Ah, got some light:
if I change
Calendar cal = GregorianCalendar.getInstance();
to
Calendar cal = new GregorianCalendar(
TimeZone.getTimeZone("CEST"), new Locale("DE"));
I get better results:
31.12.1990 is week #1 / year 1990 has 52 weeks
31.12.1991 is week #1 / year 1991 has 52 weeks
31.12.1992 is week #53 / year 1992 has 53 weeks
31.12.1993 is week #52 / year 1993 has 52 weeks
31.12.1994 is week #52 / year 1994 has 52 weeks
31.12.1995 is week #52 / year 1995 has 52 weeks
31.12.1996 is week #1 / year 1996 has 52 weeks
31.12.1997 is week #1 / year 1997 has 52 weeks
31.12.1998 is week #53 / year 1998 has 53 weeks
31.12.1999 is week #52 / year 1999 has 52 weeks
31.12.2000 is week #52 / year 2000 has 52 weeks
31.12.2001 is week #1 / year 2001 has 52 weeks
31.12.2002 is week #1 / year 2002 has 52 weeks
31.12.2003 is week #1 / year 2003 has 52 weeks
31.12.2004 is week #53 / year 2004 has 53 weeks
31.12.2005 is week #52 / year 2005 has 52 weeks
31.12.2006 is week #52 / year 2006 has 52 weeks
Maybe there is a problem getting the "default" Locale and/or Timezone.
I changed the line to
Calendar cal = new GregorianCalendar(TimeZone.getDefault(), new Locale("DE"));
looks good - results are ok. And
Calendar cal = new GregorianCalendar(
TimeZone.getTimeZone("CEST"), Locale.getDefault());
Looks bad, problem is the default Locale. But how to fix this in FreeBSD, is
there a file in /etc/ which contains a default ? "locale" reports:
# locale
LANG=
LC_CTYPE="C"
LC_COLLATE="C"
LC_TIME="C"
LC_NUMERIC="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_ALL=
with
# setenv LANG de_DE.ISO8859-1
this could be fixed - and my test program works ! Now looking for a good place
where to set "LANG" system wide ...
Heiko
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200605301532.30185.java>