J2EE.

I just downloaded, installed, and brought up Sun's J2EE application server on my machine. WOW, does it appear to be a resource hog! I request the simple hello world app from the server and my system gets to thrashing like you wouldn't believe. I should probably add more memory but I am quite sure that would disappear in a hurry here.

Of course, it is a stock setup so I could probably tweak the configuration to improve performance but my aim is to learn how to code J2EE compliant java and java servlets and the like.