Unloading / destroying instances of java classes

[NINA.de Internet Service Agentur]

Hi,

is there a free tool to visualize the loaded instances (class name and
count) of a running JVM and force the unload of some of them.

We want to unload / destroy only certain classes and not shutdown the hole
application or Tomcat while development.

The reload functionality of updated classes doesn't reload classes used by
unchanged java beans.
But we use beans.

Regards
Ralf.