very simple java programs

From: David Walker (nospam_at_nospam)
Date: 03/30/04 

Date: Tue, 30 Mar 2004 18:29:28 -0000

I have a school assignment where I have to 'build upon' a program somebody
else's program and add 'concepts' not implemented in the original
application (should not be longer than a few pages - tutor has to read god
knows how many students').

Frankly it would be easier to do something from scratch, but the whole
objective is to extend code written by somebody else.

Googled my way around but could not come across anything which was simple
enough to warrant extending. I am desperately trying to dig out something
like a basic tcp scanner that doesn't implement a GUI or threading, etc.

Any links, clues, anything?

Pretty please.....