The result of subtracting one date from another is not a date - in fact it's
pretty meaningless. This is not specific to java.
It depends what you want to get out - do you want the number of seconds between
the dates, milliseconds, days, hours, months etc?
For your problem (inactivity > 1 hour) something like the following will do:
if ( date1.getTime() - date2.getTime() > 1000 * 60 * 60 )
{
//do something
}
You can get the same effect by using the Calendar class - this is generally
better practice since it does a lot of stuff to do with locales, and a lot of
the date stuff is now deprecated.
Denis Bucher wrote:
> Hello !
>
> My servlet opens a database connexion when started (in init()) only and I
> want him to close and reopen the connexion if inactivity is more than one
> hour. But HOW TO GET THE DIFFERENCE BETWEEN TWO DATES ???
>
> java.util.Date datenow = new java.util.Date();
> out.println("Date now : " + datenow.toString());
> out.println("Last dbase access : " + datedb.toString());
> datedb = new java.util.Date();
>
> And then ?????
>
> new date = datedb - datenow ????
>
> And why do I have to say "java.util.Date" and not simply "Date" ???
>
> Denis
>
> --
>
> Denis Bucher, / [EMAIL PROTECTED] T�l. +41-22-8000625 \ Internet
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>
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