Re: Recording and looking up dates, when day-wide precision is required
Re: Recording and looking up dates, when day-wide precision is required
- Subject: Re: Recording and looking up dates, when day-wide precision is required
- From: Lachlan Deck <email@hidden>
- Date: Tue, 23 Dec 2008 07:22:13 +1100
On 23/12/2008, at 6:32 AM, Florijan Stamenkovic wrote:
I am recording daily currency conversion rates.
The problem I have is that at the moment currency information can be
input from wherever on the planet. Now, most users will deal with
date info only, when it comes to currency info, leaving time and
timezone issues in Java's hands.
Right so a user puts in a date like '23 Dec 2008'
Java seems to automatically set a parsed date to the time of
00:00:00 in the current timezone.
What I am thinking of is "normalizing" dates after input.
It'll parse the time into whatever timezone you set to the formatter.
If you're using SimpleDateFormat, for example, set the timezone to be
parsed (if other than the default). You could set it to GMT for
example .. or allow the user to select it.
Essentially extracting the date (textually) from the Date that Java
parsed, and setting it to 12:00:00 GMT, in hope that will ease
qualification / filtering later on.
Shouldn't need to worry about that if you get the input right. Just
ensure you keep your Java/WO timezone info up to date.
http://support.apple.com/kb/TA24629?viewlocale=en_US
http://java.sun.com/javase/timezones/
with regards,
--
Lachlan Deck
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