Hi. Are you using version 1.4 of the older Axis or the newer Axis2 version 1.4?
For Axis1, see here for how marshalling works, and for Axis2, please read this article.
If its JAX-RPC, the web service classes will typically implement java.rmi.Remote in your code. Please see the J2EE 1.4 tutorial for an overview.
If its JAX-WS, you will see the web service classes annotated with @WebService in the code. And the Java EE 5 tutorial has an overview.