Where classes should be stored?

Hi
im developing a chat program based on RMI.
the chat client program contains a list of clients and a connected id panel with their details( nickname,age,image e.g) , so whenever I move the list highlight on each client the id panel change with the highlighted client information.
As you see I need to make up a cash memory class in the client program which stores the clients information in order to provide a smooth slider action of the id panel.
Since I use RMI I wonder if I need to make this cash memory object under the client or under the server?
Do the RMI registry server actually downloads the remote object to the client computer?
thanks

o If you think the clients can get that list fast
enough from the server to support the screen, then you
don't need a cache.Don�t you think that I refer this sketchy question to be considered with the answered expert?
Im developing a chat program with lots of gui states. the server is a remote object , I store the client�s info and image in a storage object on the server , my client need this storage elements to be available and fast as it was a local object. I ask if I should put this storage object in the server as a remote remote object or should I copy it to the client itself in order to provides faster performance. ?
The registry does not do any downloading of anything
except a reference to a server (when the server is
looked up).
The client then uses that reference to make calls on
server methods. Those calls execute on the server
computer.What happens if the remote server has to store a real-time object ( object which change as Hashtable) ?
thanks

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