Re: Does ID describe a TimeZone completely?

From:
Lew <noone@lewscanon.com>
Newsgroups:
comp.lang.java.help
Date:
Thu, 27 Jan 2011 09:29:10 -0500
Message-ID:
<ihrvb1$heb$1@news.albasani.net>
Robin Wenger wrote:

Lets start with two TimeZone declarations

TimeZone a;
TimeZone b;

When I code now:

....fill a (externally)......

TimeZone b.setID(a.getID());

Are then both TimeZone objects equal (in content, not in memory) ?

In other words: Does an ID describe completely a TimeZone or are there other fields (Which ?) hidden in a TimeZone object
which need to be copied as well?

By the way: How do I set a TimeZone object to the current, local TimeZone?
Can I assign it somehow from a Date() [sic] object?


Teach a man to fish:
<http://download.oracle.com/javase/6/docs/api/java/util/TimeZone.html>

We find this gem there, the second sentence of the docs:
"Typically, you get a TimeZone using getDefault which creates a TimeZone based
on the time zone where the program is running."

It also explains IDs. IDs do completely define a time zone, unless they're
three-letter time zones like "EST". Not all IDs describe Summer Time, though.
  The ones you want are the standard ones such as "America/Los_Angeles".

As for getting a TimeZone from (java.util.) Date, I refer you once again to
the Javadocs (use them!):
<http://download.oracle.com/javase/6/docs/api/java/util/Date.html>

You will note that 'Date' does not contain time-zone information.
"... the Date class is intended to reflect coordinated universal time (UTC) ..."

Use the Javadocs.

--
Lew
Ceci n'est pas une pierot.

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