Use of Collection API in servlets

[Christian Sellberg]

Is it bad practice to use Collection classes like TreeMap to sort
corresponding key/values pairs if you want your servlets to be highly
scallable?! I mean can it fill up the memory if the garbage collector isn't
keeping up removing unused classes? I have a language dependent page where
users can choose their favorit language. Users can then select something and
see their choices in a dropdown menu. But the way their choices are spelled
is dependent on their language and I want to present their choices in
alphabetic order. That means I have to do the sorting dynamically. What I
have done know is just to create a TreeMap and fill it with the names as the
keys in the values of the dropdown as the values in the TreeMap. But is this
a bad way to use Collections? Will the performance suffer from such use of
Collection classes in servlets? It used for dropdownmenues with few and many
items. I create a new TreeMap instance each time the servlet is loaded.

Sincerely yours
Christian

[Paul Clapham]

Since you are doing this in a servlet, I don't think there's much of a
garbage problem. You create a TreeMap, you set up your HTML, you send it to
the client. Then there's a huge pause (MILLIONS of microseconds!) while the
client considers what to do. If your servlet is going to be serving
thousands of clients at the same time, you might have a problem, but on the
other hand I don't know of any better way to sort things.

Christian Sellberg <sellberg@mac.com> wrote in message
news:B58F298E.525%sellberg@mac.com...
> Is it bad practice to use Collection classes like TreeMap to sort
> corresponding key/values pairs if you want your servlets to be highly
> scallable?! I mean can it fill up the memory if the garbage collector
isn't
> keeping up removing unused classes? I have a language dependent page where
> users can choose their favorit language. Users can then select something
and
> see their choices in a dropdown menu. But the way their choices are
spelled
> is dependent on their language and I want to present their choices in
> alphabetic order. That means I have to do the sorting dynamically. What I
> have done know is just to create a TreeMap and fill it with the names as
the
> keys in the values of the dropdown as the values in the TreeMap. But is
this
> a bad way to use Collections? Will the performance suffer from such use of
> Collection classes in servlets? It used for dropdownmenues with few and
many
> items. I create a new TreeMap instance each time the servlet is loaded.
>
> Sincerely yours
> Christian
>
>