On Mon, 27 Jul 2009 08:05:54 -0700 (PDT), Maciej Sobczak
<s...@g...com> wrote:

>On 27 Lip, 14:26, A.L. <a...@a...com> wrote:
>
>> WeakHashMap?...
>
>Napisałem, że Item jest wartością a nie kluczem.
>Kluczem jest Long - niezbyt dobry kandydat na WeakHashMap.

Ja proponuje zeby Pan przeczytal dokladnie opis WeakHashMap.

Zdanie ""Kluczem jest Long - niezbyt dobry kandydat na WeakHashMap"
nie ma sensu jako takie.

Proponuje poczytac tutaj na przyklad

http://onjava.com/pub/a/onjava/2001/07/09/optimizati
on.html?page=1

Specifically, we want to handle the situation where the
deregisterObject() method is not called, but the registered object is
no longer referenced anywhere in the application, except by our
internal Map. This situation is precisely what WeakHashMap was
designed for. The keys entered into a WeakHashMap are held using
WeakReferences. This allows the garbage collector to collect the keys
if there are no other strong references to those keys elsewhere in the
application (for more details about strong and weak references in
Java, see the "Further resources" section at the end of this article).
After the keys have been collected, the values are also dereferenced
from the WeakHashMap, and can also be garbage collected if they are
not referred to elsewhere in the application.


A.L.