A program that listens on a port and copies files in Linux

A program that listens on a port and copies files in Linux?

I like C++ better too, but Java would be a better choice, unless you are doing gigs of data as fast as possible. Easier to write, maybe 20 lines or less.


Java code example
http://forum.java.sun.com/thread.jspa?threadID=167156&start=0