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Date wanted.

5 replies on 1 page. Most recent reply: May 27, 2004 6:52 AM by Charles Bell

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Vincent O'Sullivan

Posts: 724
Nickname: vincent
Registered: Nov, 2002

Date wanted.

Posted: May 20, 2004 1:16 AM

// Deprecated.
Date d1 = new Date(104, 05, 19, 21, 25);
 
// New improved.
Date d2 = new GregorianCalendar(2004, 05, 19, 21, 25).getTime();

Could someone let me know (briefly) what I've gained by using the second method of creating a given date.time?

Vince.

Adam Duffy

Posts: 168
Nickname: adamduffy
Registered: Feb, 2003

Re: Date wanted.

Posted: May 21, 2004 4:40 AM

> Could someone let me know (briefly)
> what I've gained by using the second method of creating a
> given date.time?

A headache?

Sorry. Seriously though, it's an interesting question. This link seems to provide the answer about the whole Date, GregorianCalendar issue.

http://java.sun.com/developer/qow/archive/172/index.jsp

Adam

Steven E. Newton

Posts: 137
Nickname: cm
Registered: Apr, 2003

Re: Date wanted.

Posted: May 22, 2004 7:47 PM

Will Daylight Saving Time be in effect at the timezone for your locale on June 19, 2004 at 21:25 hours? GregorianCalendar would know, Date doesn't. Come to think of it, when you say it's 21:25 on June 19, 2004, where in the world are you?

Vincent O'Sullivan

Posts: 724
Nickname: vincent
Registered: Nov, 2002

Re: Date wanted.

Posted: May 24, 2004 2:21 AM

> ...where in the world are you?

Ah, that could be the clincher. I'm messing about with airline timetables. Looks like I can get rid of some of the 'offsets' I've been using to make adjustments.

Thanks (for both replies),
Vince.

Adam Duffy

Posts: 168
Nickname: adamduffy
Registered: Feb, 2003

Re: Date wanted.

Posted: May 24, 2004 5:46 AM

> I'm messing about with airline timetables.

So you're the one responsible for those ridiculous 3 o'clock in the morning departures.....! :)

Adam

Charles Bell

Posts: 519
Nickname: charles
Registered: Feb, 2002

Re: Date wanted.

Posted: May 27, 2004 6:52 AM

The Date class is intended to reflect coordinated
universal time (UTC). See:

http://java.sun.com/j2se/1.4.2/docs/api/java/util/Date.html

Look at the Java Language Specification at:
http://java.sun.com/docs/books/jls/first_edition/html/javautil.doc3.html#7433

"The class Date provides a system-independent
abstraction of dates and times, to a millisecond
precision."

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