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From: Wojtek on 2 Nov 2009 19:09
How would you sort timezones?

I am trying to sort them according to their offset from UTC. I cannot
use a TreeMap because there are many timezones with the same offset,
which of course over-writes the previously put timezone.

The preferred sort would be offset, then display name.

--
Wojtek :-)


From: markspace on 2 Nov 2009 19:22
Wojtek wrote:
> How would you sort timezones?
>
> I am trying to sort them according to their offset from UTC. I cannot
> use a TreeMap because there are many timezones with the same offset,
> which of course over-writes the previously put timezone.
>
> The preferred sort would be offset, then display name.
>


I guess put them all in an array, the use Array.sort( Object[],
Comparator<T>) to sort them as you desire.

From: Peter Duniho on 2 Nov 2009 19:22
Wojtek wrote:
> How would you sort timezones?
>
> I am trying to sort them according to their offset from UTC. I cannot
> use a TreeMap because there are many timezones with the same offset,
> which of course over-writes the previously put timezone.
>
> The preferred sort would be offset, then display name.

Are you asking what the sort order should be? Or how to implement a
particular sort order?

Pete
From: Patricia Shanahan on 2 Nov 2009 19:38
Wojtek wrote:
> How would you sort timezones?
>
> I am trying to sort them according to their offset from UTC. I cannot
> use a TreeMap because there are many timezones with the same offset,
> which of course over-writes the previously put timezone.
>
> The preferred sort would be offset, then display name.
>

You could use a TreeMap or TreeSet if you constructed it with a
Comparator that implements your preferred order.

Patricia
From: Wojtek on 2 Nov 2009 19:48
markspace wrote :
> Wojtek wrote:
>> How would you sort timezones?
>>
>> I am trying to sort them according to their offset from UTC. I cannot use a
>> TreeMap because there are many timezones with the same offset, which of
>> course over-writes the previously put timezone.
>>
>> The preferred sort would be offset, then display name.
>>
>
>
> I guess put them all in an array, the use Array.sort( Object[],
> Comparator<T>) to sort them as you desire.

Yes, I made my own custom Comparator.

But I just found out what the problem is. You can retrieve a TimeZone
using a variety of names, but that TimeZone only has one display name.
For instance, in Canada:

Canada/Newfoundland Newfoundland Standard Time
Canada/Atlantic Atlantic Standard Time
Canada Eastern Eastern Standard Time
Canada/Central Central Standard Time *
Canada/East-Saskatchewan Central Standard Time *
Canada/Saskatchewan Central Standard Time *
Canada/Mountain Mountain Standard Time
Canada/Pacific Pacific Standard Time *
Canada/Yukon Pacific Standard Time *

I retrieve them using the left names, but the .getDisplayName() returns
the right side. Which throws the sorting out.

Ok, I can make this work. Funny how actually _asking_ a question can
lead to an answer...

--
Wojtek :-)


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