Hello everyone, I am having a small problem with c...

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[Jeff Thomas]

Hello everyone, I am having a small problem with co-variance. I am using two different Java libraries and one returns a Class<in T> (Class<? super T>) and the other expects a Class<T> as an argument.

I am getting a type mismatch "Required: Class<T> Found: Class<in T!>!".

I am sure there is a simple solution 🙂 but I can't figure out how to get from the one to the other.

Any tips?

[Marc Knaup]

Well you can just cast it as Class<T>
But the question is why the libraries return and expect it in the way they do and whether passing one to the other makes sense.

[Jeff Thomas]

Thanks Marc, that is what I was going with but was getting unchecked cast warning and wanted to be sure that the cast was ok... still grappling with the co-variant concepts... 😐

Well the first library is google gson... it returns the raw type of a TypeToken as Class<? super T>. I am trying to use that to create a generic class which takes a Class<T> argument.