Generics cast issue

Question

Here\'s my issue: given these classes

class A {}
class B extends A {}

This code compiles:

    List

        

Answer 1

Just to add, we can rewrite the code as below

List> asListA = Arrays.asList(B.class, A.class);
List> asListB = Arrays.asList(B.class);

List> numbers = asListA;
List> numbers2 = asListB; // it will fail here

And @Inerdia explained the details already.