Unbounded wildcards in Java

Question

Is there ever a difference between an unbounded wildcard e.g. and a bounded wildcard whose bound is Object, e.g.

Answer 1

From experimentation it seems that, for example, List and List are assignment-compatible both ways, and a method that has a signature using one of them can be overridden with a signature using the other. e.g.,

import java.util.List;

class WildcardTest {
    public void foo(List bar) {}
}

class WildcardTest2 extends WildcardTest