Calendar chooser problem

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bilaribilari@yahoo.com - 26 May 2005 05:47 GMT

Hi,
I am using a Date selector component that allows the user to visually
select a date (day-month-year). But there is a slight problem I am
facing:

CalendarChooser objFromDate = new CalendarChooser () ;

CalendarChooser objToDate = new CalendarChooser () ;
.
.
.
Date dtFrom = objFromDate.getDate () ;
Date dtTo = objToDate.getDate () ;

return dtFrom.compareTo ( dtTo ) ;

The last line does not return 0 even if identical dates were selected.
This is probably because of the very slight time difference between
creation of the two CalendarChooser objects. If I see the Date values
in the debugger, they are identical, but if I see the 'long' value of
the dates, they differ in the last three digits.
How do I get around this problem? I cannot set the time component to 0
entirely since at some places, the time is also required. Setting the
millis and nanos component of the date also seems pretty patchy at
best.

Thanks in advance.

Best regards.

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Andrew Thompson - 26 May 2005 05:59 GMT

> Hi,
> I am using a Date selector component that allows the user to visually
> select a date (day-month-year).

No, you are using two of them.

>..But there is a slight problem I am facing:
>
> CalendarChooser objFromDate = new CalendarChooser () ;
>
> CalendarChooser objToDate = new CalendarChooser () ;

// replace the above with
CalendarChooser chooser = new CalendarChooser();

> .
> .
> .

What does '...' mean, specifically?

Do you initialise the choosers, display them, then block till
a date is selected?

If so, do that once, then..

> Date dtFrom = objFromDate.getDate () ;

Date dtFrom = chooser.getDate();

[ repeat the chooser initialise/display/block from above ]

> Date dtTo = objToDate.getDate () ;

Date dtTo = chooser.getDate();

> How do I get around this problem?

Perhaps another group would be better suited to your
needs at the moment..
<http://www.physci.org/codes/javafaq.jsp#cljh>

HTH

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Andrew Thompson
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Niels Dybdahl - 26 May 2005 07:59 GMT

> CalendarChooser objFromDate = new CalendarChooser () ;
> CalendarChooser objToDate = new CalendarChooser () ;
[quoted text clipped - 3 lines]
>
> The last line does not return 0 even if identical dates were selected.

Date does also include the time. So if you really only want to compare the
dates, then create new dates like:

Date dtFromDateOnly = new Date(dtFrom.getYear(), dtFrom.getMonth(),
dtFrom.getDate(), 0, 0, 0);

Or you might use similar functions from Calendar as most of the functions
above are deprecated.

Niels Dybdahl

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Lee Weiner - 26 May 2005 23:02 GMT

>Date dtFrom = objFromDate.getDate () ;
>Date dtTo = objToDate.getDate () ;
[quoted text clipped - 10 lines]
>millis and nanos component of the date also seems pretty patchy at
>best.

So, if the time component is significant, what is your definition of equality?
When do you want compareTo() to return 0?

Lee Weiner
lee AT leeweiner DOT org

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Calendar chooser problem

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