World Clock

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abhinavchadda - 23 Sep 2007 16:23 GMT

Hi,
I am working on developing a world clock for my personal use.. i've
made the analog clock in flash and everything is working fine but the
problem is i am not getting it to correct the Daylight savings time.
The implemetation details are as follows.
Jsp page has 4 combo boxes with the location names and the value of it
is set as the time zone offset. This value is sent to the flash file
which takes the UTC time and adds the TZ offset to it and displays
the time. the problem is How do i detect if the particular zone has
DST or not?

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Real Gagnon - 23 Sep 2007 16:47 GMT

> I am working on developing a world clock for my personal use.. i've
> made the analog clock in flash and everything is working fine but the
[quoted text clipped - 5 lines]
> the time. the problem is How do i detect if the particular zone has
> DST or not?

You get the DST value by calling TimeZone.getDSTSavings(). Add the value to
TimeZone.getRawOffset() and divide by 3600000.

Example at http://www.rgagnon.com/javadetails/java-0589.html

Bye.

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Real Gagnon from Quebec, Canada
* Java, Javascript, VBScript and PowerBuilder code snippets
* http://www.rgagnon.com/howto.html
* http://www.rgagnon.com/bigindex.html

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Roedy Green - 23 Sep 2007 23:12 GMT

On Sun, 23 Sep 2007 15:23:13 -0000, abhinavchadda
<abhinavchadda@gmail.com> wrote, quoted or indirectly quoted someone
who said :

> the problem is How do i detect if the particular zone has
>DST or not?

See http://mindprod.com/jgloss/timezone.html

look at the source code for the Applet on that page.

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Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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Sabine Dinis Blochberger - 24 Sep 2007 12:42 GMT

> Hi,
> I am working on developing a world clock for my personal use.. i've
[quoted text clipped - 6 lines]
> the time. the problem is How do i detect if the particular zone has
> DST or not?

I wonder if the date parts of ICU4J (http://www.icu-project.org/) would
be of any use to you. Best wishes.

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Sabine Dinis Blochberger

Op3racional
www.op3racional.eu

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abhinavchadda - 05 Nov 2007 18:36 GMT

On Sep 24, 4:42 pm, Sabine Dinis Blochberger <no.s...@here.invalid>
wrote:

> > Hi,
> > I am working on developing a world clock for my personal use.. i've
[quoted text clipped - 13 lines]
>
> Op3racionalwww.op3racional.eu

Hi guys...

Thanks for your replies....
I have used a different approach, I have mapped the timezones to the
Java Timezones and whenever the user selects a different timezone, an
Ajax call is made to check whether tht timezone is in DST or not and
then automatically the timeis adjusted ...

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