Kevin,
Thanks a lot for gving me such useful pointers.
Though aware of Lists and Comparators, I didn't know
TreeMaps.
>From my original question of sorting, the data needs
to be stored somewhere, right either in a file using
TreeMaps or in the session.
Performance wise which would be better?
Thanks,
Ravi.
--- Kevin Baynes <[EMAIL PROTECTED]> wrote:
> Ravi-
>
> You need to look at the Collections API for storing
> your data. This will
> teach you about TreeMaps, Lists and Comparators:
>
>
http://developer.java.sun.com/developer/onlineTraining/collections/Collectio
> n.html
>
http://developer.java.sun.com/developer/technicalArticles/Collections/Using/
> index.html
>
> You will also need to understand Serialization and
> the Serializable
> interface:
>
>
http://java.sun.com/docs/books/tutorial/essential/io/serializing.html
>
http://java.sun.com/products/jdk/1.2/docs/guide/serialization/
> be sure to look at the examples and FAQ in the above
> link.
>
> Kevin Baynes
> SEAGULL Software
>
>
>
> > -----Original Message-----
> > From: A mailing list for discussion about Sun
> Microsystem's Java Servlet
> > API Technology.
> [mailto:[EMAIL PROTECTED]]On Behalf Of
> Ravi
> > Shankar Jagarapu
> > Sent: Wednesday, July 18, 2001 11:01 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Sorting using servlets
> >
> >
> > Hi Mark,
> >
> > It would be great if you could give me an example
> > code. I did not understand what you wrote? is
> there
> > any article where I could read about that?
> >
> > I don't know what is a TreeMap. Could you
> enlighten
> > me?
> >
> > Thanks,
> > Ravi.
> >
> > --- Mark Galbreath <[EMAIL PROTECTED]> wrote:
> > > Nah...that would not be efficient. Better to do
> it
> > > on the server by sending
> > > the data into a TreeMap (implements SortedMap)
> and
> > > make it available to all
> > > clients through a serialized download.
> > >
> > > Cheers!
> > > Mark
> > >
> > > ----- Original Message -----
> > > From: "Mike Peyvandi" <[EMAIL PROTECTED]>
> > > Sent: Tuesday, July 17, 2001 11:39 PM
> > >
> > >
> > > > Another option would be an applet in the
> response
> > > to take care of sorting
> > > at
> > > > the client side. This way you can omit some
> extra
> > > calls to the server for
> > > > sorting purpose.
> > > >
> > > > Mike
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Kevin Baynes
> > > > Sent: Tuesday, July 17, 2001 2:43 PM
> > > >
> > > > Ravi-
> > > >
> > > > You could make the database call, save the
> results
> > > into a temporary
> > > > structure, put it where you can access it on
> the
> > > next call. You can do
> > > this
> > > > by either saving it to the Session, or by
> > > serializing it to a file and
> > > > accessing it by some key that you save to the
> > > Session.
> > > >
> > > > You could use Arrays, Vectors, Lists, or a
> custom
> > > built object.
> > > >
> > > > I suggest you use Lists and Comparators for
> > > storage and sorting.
> > > >
> > > > Kevin Baynes
> > > > Seagull Software
> > > >
> > > > > -----Original Message-----
> > > > > From: Ravi Shankar Jagarapu
> > > > > Sent: Tuesday, July 17, 2001 12:39 PM
> > > > >
> > > > > I am retrieving data from the database with
> > > several
> > > > > fields, like for example first name, last
> name,
> > > > > join date, salary.
> > > > >
> > > > > This data is displayed by the servlet.
> > > > > Now my requirement, is that, if anyone
> clicks on
> > > first
> > > > > name, the data should now be displayed
> sorted on
> > > that
> > > > > field and if on salary then sorted on
> salary.
> > > > >
> > > > > I don't want to connect to the database each
> > > time and
> > > > > retrieve the same information just to sort
> the
> > > data
> > > > > which is already available to me.
> > > > >
> > > > > Can anyone suggest a better method? Would be
> > > great if
> > > > > you could give an example code.
> > > > >
> > > > > Many Thanks,
> > > > > Ravi.
> > >
> > >
> >
>
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