J2EE SDK client-server on my PC

dear friends, I need your help, please.
First I studied J2SE as client on my PC.
Now I should like to study J2EE client-server, but I own only one PC.
Is it possible to simulate a J2EE client-server situation inside a single PC? And how?
many many thanks for your attention!

these 2 steps are done; the 3? step below, I don't
understand:
"start the client on your local machine and
connect to the server."
You've started the server - that's good. Have you written and deployed an application on it? A servlet or a JSP that you can contact if you start up a browser and type that URL into it? That's the step you've missed. The app server offers you little more than the console until you write and deploy an app on it.
you are right, my PC doesn't support this. Anything of lighter?I don't know which J2EE app server you've downloaded, but it's likely that you don't need more than a servlet/JSP engine. If that's true, I'd recommend Tomcat: http://tomcat.apache.org
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