I'm reading through jGuru's Enterprise JavaBeans Fundamentals. On page 7 of my print out, it states that EJB doesn't require, in fact it is encouraged that they not, implementing the home or remote interfaces. It says that the container will implement these. What I don't understand is how the container knows to implement them? For instance, the CustomerHome interface in their example defines create(Integer customerNumber). How does the container know how to instantiate the CustomerBean with customerNumber? Does it do this through introspection of the CustomerBean class? I note that their example of CustomerBean doesn't implement a mutator for a customerNumber property. How does it work?