Thank you all for you patience with me. I see now that the millis value is
always UTC based. But I'm still at a loss for a solution. I'll try being
more concrete by describing something closer to our actual problem:
The scenario:
1) We have a server application. All the code deals with UTC time values
(seconds since 1970-1-1)
2) We have a portable hardware device that needs to have it's clock
synchronized with the server's clock.
3) The device is being used in Pacific Time (not UTC).
4) The device is time zone "unaware". To set it's clock you merely give it
a 32 bit value representing seconds since 1970-1-1.
The algorithm:
1) Server determines current time (seconds since 1970-1-1 UTC)
2) Server adjusts this time value to be local to Pacific Time.
3) Server sends device the value calculated in step 2 as a 32 bit number.
How do I achieve step #2 with the Joda-time library?
On Fri, Jun 27, 2008 at 7:19 AM, P.Hill & E. Goodall <[EMAIL PROTECTED]>
wrote:
> Adam B wrote:
> > Thanks for the quick response, Stephen. The issue is that I don't want
> > to query any particular date field of DateTime but rather I essentially
> > want to create a unix time value that represents the fields. Let me ask
> > in a different way:
> >
> > Current time in Australia is 2008-6-30 14:05:00. The unix time value
> > for this is 1214834700. I want to know the current unix time value in
> > Los Angeles.
> >
> > Of course I'd like a generalized solution:
> >
> > int unixTimeSomewhereElse(int localUnixTime, DateTimeZone localTimeZone,
> > DateTimeZone targetTimeZone)
> > {
> > ???
> > }
>
> If by Unix time you mean the Long integer value, the value is always the
> same, because it is defined as "the difference, measured in
> milliseconds, between the current time and midnight, January 1, 1970 UTC."
>
> --
>
> http://java.sun.com/j2se/1.4.2/docs/api/java/lang/System.html#currentTimeMillis()<http://java.sun.com/j2se/1.4.2/docs/api/java/lang/System.html#currentTimeMillis%28%29>
>
> This is one of many places which remind us that it is a count from
> ***UTC*** not from local midnight on 1/1/1970.
>
> -Paul
>
>
>
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