In the java.util.Collections class, the max method is declared as follows:

static <T extends Object & Comparable<? super T>> T max(Collection<? extends T> coll) {
        // impl.
}

My question is, why is the type parameter T explicitly upper-bounded by Object?

What would be different if the method were instead declared as:

static <T extends Comparable<? super T>> T max(Collection<? extends T> coll) {
        // impl.
}