Difference between Entity bean and Entity class?

Question

What are the differences between entity beans which are in the EJB 2.0 specification and entity classes which in the 3.0 spec

Answer 1

In EJB 2, entity was a bean meaning that it had to live in a container and need to be managed (similar to other beans, say stateful, stateless, message driven beans).

However in EBJ 3.x, entity is a POJO class - meaning that it can live outside container also.. plain java application can make use of entities as ORM layer with any providers supporting it..