Importing Class files problem

When I was trying to do Servlets and I got the problem of importing  import javax.servlet.annotation; code in the environment. It can't understand this fragment of code while it knows import javax.servlet.*; so I can't use annotations like @WebServlet("/test")
What kind i do?

JBoss and Tomcat

I really want the feasible difference between JBoss and Tomcat. I understand what Tomcat is and I was using on it well. But what makes JBoss different from Tomcat so.

Greeting

Welcome all of you!