Cade's book dashed association question

[Krzysztof Grajek]

I have a question regarding class diagram presented in Cade's book. On the diagram he uses a dashed arraw to depict assoctiation between jsp pages and controller as well as between stateless beans and entities with <<uses>>. Is it UML compilant? What kind of association is this, I understand association with solid line, aggragation, composition, but cannot find anywhere association with a dashed line.

[Krzysztof Koziol]

It's a dependency and it's UML compliant

[Krzysztof Grajek]

That was a lame question, of course its a dependency, I had a blackout or something , its even named 'dependency' in my uml tool . What I actually don't know is when to use which, I mean in which cases should I use generalized dependency notation and, in which cases should I use association (arrow ended or just straight line)?

[Krzysztof Koziol]

You may use dependency to show that one class uses other class as method return type or method argument, one class use other class in the method body etc.