Environment entry lookup

[Sylvain Bouchard]

Hi ranchers,

I've just finished to read HeadFirst EJB...

And I have a question about the last coffee cram
exam [p.628 question #4].

My answer was B, C, but I don't understand why B is wrong.

Question is:

Given a bean named "Customer", and an environment entry named "lastName",
which code fragment(s) inside of the bean class would return the value
of the environment entry?

Answer B is:

Context c= new InitialContext();
Context e= (Context) c.lookup("java:comp/env/Customer");
String name = (String) e.lookup("lastName");

Thanks

Sylvain

[Greg Charles]

It's just the wrong way to look up an environment entry. The name of the bean is unnecessary. You can only access the special java:/comp/env from within the bean code and the bean code already knows what kind of bean it is. There's a different environment for each bean type, and each one can only access its own. C is wrong because there's no such thing as a Lookup class. The correct answer is E.

[Sylvain Bouchard]

Thanks Greg.

I thought that was a subcontext. But in reality, it's the bean !!

Sylvain