Hi,

Someone please explain me this -

From chapter 1 page 17..
It isn’t possible to determine the multiplicity of a unidirectional association by looking only at the Java classes.

Then the author says ....

Java associations can have many-to-many multiplicity.
For example, the classes could look like this:

public class User {
private Set billingDetails;
...
}
public class BillingDetails {
private Set users;
...
}

Does the second sentence explains what the first sentence has to say, if yes...how?

Or simply put...why the author says what he says in the first sentence

Thanks,

Ammar

I guess you're speaking about the Java Persistence with Hibernate book? If so, you should crawl the archive in the specific forum here (there's one dedicated to the hibernate books) before posting directly into this one.