How does Collections.reverseOrder know what type parameter to use while returning Comparator

Question

As per Java API spec, the signature of Collections.reverseOrder is

public static Comparator reverseOrder()

And the example gi

Answer 1

Arrays.sort() knows what kind of Comparator it needs, since T is specified by the first argument (a):

public static  void sort(T[] a, Comparator c)

EDIT:

@Louis Wasserman correctly points out that we only need a Comparator, not a Comparator. Since Object is a superclass of any T, then Comparator