Send both parameters and objects to servlet

Is it possible to send both parameters ( as if coming from a form) and
binary objects( such as vector) from an applet to a servlet. I want to
be able to read properties as regular parameters using getParameter and
also get objects. Is this possible and if so how do I set up the
regular parameters ( provided I am writing the binary objects to a
stream) and how do I then retrieve them.

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