RE: how to calculate #days between dates

["Christopher J. Jewell" <jewellcj@xxxxxxxxxxxxxxxxx>]

This fragment is not very elegant, but it does the trick (calculating the
days between two dates including a 'window' either side)...
        ...
        GregorianCalendar gcFrom = new GregorianCalendar();
        GregorianCalendar gcTo = new GregorianCalendar();
        GregorianCalendar gc = new GregorianCalendar();


        gcFrom.setTime(arrivalDate);
        gcFrom.add(Calendar.DATE, -arrivalWindow);
        windowFromDate = gcFrom.getTime();


        gcTo.setTime(departureDate);
        gcTo.add(Calendar.DATE, departureWindow);
        windowToDate = gcTo.getTime();

        // Calculate the number of days (nights stayed) between the two dates
        gc.setTime(windowFromDate);

        while (true) {
                gc.add(Calendar.DATE, 1);
                if (!gc.after(gcTo)) {
                        numberOfDays++;
                }
                else {
                        break;
                }

        }
        ...

Hope this helps...

CJ


-----Original Message-----
From: java400-l-admin@midrange.com
[mailto:java400-l-admin@midrange.com]On Behalf Of Robert Upshall
Sent: Thursday, January 10, 2002 1:30 PM
To: java400-l@midrange.com
Subject: Re: how to calculate #days between dates


Does anybody have an example of how to use those classes or does anybody
know of an example online.

I just looked at those classes and I'm a little unsure of  what I'd need to
do.


----- Original Message -----
From: "Mike Silvers" <msilvers@hbs-inc.com>
To: <java400-l@midrange.com>
Sent: Thursday, January 10, 2002 2:55 PM
Subject: Re: how to calculate #days between dates


> use the Calendar class....
>
> ================================
>
> Mike Silvers
> AS/400 Senior Programmer/Analyst
> AS/400 IBM Certified RPG IV Developer
> AS/400 IBM Certified Expert
> Hainey Business Systems
> 8 E. Canal St
> Dover, PA 17315
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> ________________________________
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> nationwide.
> ================================
> ----- Original Message -----
> From: Robert Upshall <rupshall@psasoft.com>
> To: <java400-l@midrange.com>
> Sent: Thursday, January 10, 2002 3:43 PM
> Subject: how to calculate #days between dates
>
>
> > I have 2 dates, 8-digit BigDecimal, CCYYMMDD format, is there an easy
way
> to
> > use the java Date classes to calculate the # of days between the dates?
> >
> > Robert Upshall
> > Professional Software of Amarillo
> > (806) 358-8928
> > rupshall@psasoft.com
> >
> >
> > _______________________________________________
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