Get user's locale / Timezone

Question

Hi
I am developing Customized Calendar jsp on OCS by
only using Calendar API(calendarlet.jar) not using Portal API.
I have problem to get User's Locale/TimeZone that User had set in Preference.
Calendar API Select and Display baesed on UDT
CASE :
" User had choice certain TimeZone in Preference
then Calendar PKG display time based on User Selected Time-Zone
but Customized Calender JSP displayed time on UCT "
How can I get locale/TimeZone that user had set in Calendar Preference ?
(Using calendar API)

Answer 1

That's odd. You say that java.util.Date doesn't have
any timezone in it, but when I insert a breakpoint
and look at the contents of the object it has a
sun.util.calendar.BaseCalendar and that has a
timezone in it. Date != Calendar. A Date is just a long. Like I said, right this second, if you, I, somebody in Chicago, somebody in NY, somebody in London, and somebody in Tokyo all create a Date, the long will be the same for all of us--number of millis since 1/1/1970 00:00:00 GMT. (Note that this does NOT meant that Date "has" a TZ. It does not.) The TZ comes when a String is created from the Date.
I always just assumed that that
timezone must be what I was having trouble with.
As for the DB, I assumed that mysql was timezone
agnostic, and simply took times in and spit them out
exactly the same. Are you saying that when I put 8AM
in, if a person in england had that database that
same value would read midnight? If so, is there any
way to make it timezone neutral? It's complicating
things.It is TZ-agnostic. You're overcomplicating it.
// In LA, I do
date = new Date(); // Ignore util.Date/sql.Date/Timestamp distinction for now
S.o.p(date); // prints out Thu., 9:53 a.m. PDT
ps = con.prepareStatement("insert into whatever values (?)");
ps.setDate(1, date);
ps.executeUpdate();
// In London, you do
rs = execute("select * from whatever"); // yeah, I'm fudging the jdbc stuff. Just lazy
rs.next();
date = rs.getDate(1); // this Date wraps the same long as my original in LA
S.o.p(date); // prints out Thu., 5:53 p.m. BST or whatever
sdf = new SimpleDateFormat(some format);
sdf.setTimeZone(new york);
S.o.p(sdf.format(date)); // prints Thu., 12:53 p.m. EDTThe DB stores "N millis since the epoch", or something equivalent. My LA Java and your London Java read that value and interpret it as the same point in time. When we print it, it converts to the appropriate TZ.