see i'm new in java things...
you need just need to install Tomcat 6.0 which is very easy just keep clicking next next..dont change anything. & voila it works.
localhost:8080 will open the tomcat which is fully capable of servlet &
JSP engine. Now to run servlets using the same machine save you servlets file in C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\examples\servlets directory...
to see the existing examples in tomcat.. try
http://localhost:8080/examples/servlets/ regards
-k