I've been tasked with writing a small app to that needs to talk to a
remote server via raw http.
Data is to be sent and received using name-value pairs. I have been
given the syntax for various http requests.

My app doesn't know much about the server app (on a customer's
computer). Where do I start? What sort of classes do I need to be
using?

Do I need any other parameters for setting up the Http connection other
than the IP address and port number? The server machine is running
Tomcat Webserver (not that that should make any difference.)

Any tips would be very gratefully received.

Greg.