If youre having problems compiling, i.e. missing the servlet jars, you can get a copy of the jar in server/all/deploy/jbossweb-tomcat50.sar/servlet-api.jar or if you have sun's j2ee distribution installed, adding the j2ee.jar into your classpath would work also. As for deploying your servlet you dont really need the jar as tomcat (which jboss uses as its servlet container) will have it..