Generic method with parameters vs. non-generic method with wildcards

Question

According to this entry in the Java Generics FAQ, there are some circumstances where a generic method has no equivalent non-generic method that uses wildcard types. According

Answer 1

These are not quite the same:

> void f(Class x) {}
void g(Class> x) {}

The difference is that g accepts a "Class of unknown that implements Iterable of unknown", but ArrayList is constrained implementing Iterable, not Iterable, so it doesn't match.

To make it clearer, g will accept Foo implements Iterable, but not AraryList implements Iterable.