J2EE - Java Bean EJB Examples

Hi,
I am currently working with JSP, EJB

I have following details for different kind of beans.
I am struggling to understand use of beans in a practical everyday applications.

Can someone please  list sample examples for me?

Session Bean : Comes into existence when clients starts a session. Only open until that session from browser is alive.
A browser session is stateless session and nothing is remembered from one click to another. A session bean will remember the task done by session.

Entity Bean : Will host  session of an object like customer, invoice. Normally persistent beans. The info is not vanished. When created will restore data from old state.

Message Beans : Communicate from one tier to another

Thanks
crazywolf2010Asked:
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