Create a public class named
Max with a single class method named
max should accept an array of objects that implement
OurComparable and return the maximum.
Assert that the array is not
null or empty.
As a reminder,
compareTo returns a negative integer, zero, or a positive integer as this object is less than,
equal to, or greater than the passed object.
OurComparable works exactly the same as the official
Comparable interface, except it is slightly simplified
and does not accept a type parameter.