Session Bean Implementations

To implement the local stateless bean

1. import javax.ejb.Stateless;
2. add the annotation above the class: @Stateless  to see what is the difference between beans check my Choosing and developing a Session Bean

To implement the remote statelful bean

1. import javax.ejb.Statelful;
2. add the annotation above the class: @Stateful

To implement the local singleton bean

1. import javax.ejb.LocalBean;
2. import javax.ejb.Singleton;
3. add the annotation above the class:
   1. @LocalBean
   2. @Singleton

Every session bean has:

1. Business interface
2. Implementation class
3. Deployment descriptor information