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but is/are there any class(es) in the standard java library that offers ssh connection capabilities? many of the code I see are using other libraries.

can exceptions be propagated from server(UnicaseRemoteObject) to client(Remote) using java rmi and normal java language semantics?

I need to write a client and a server, server monitors whether a file exist and the client simply connects to it periodically is ask for a file transfer, the connection has to be secure.