Objects that have an ordering are compared using the compareTo() method.
6. Rules for compareTo()
compareTo()works the way number comparisons work in ordinary arithmetic. Here are a few rules. Most of these are sensible if you think about numbers. Say that
A.compareTo(B) > 0 and
B.compareTo(C) > 0 then
A.compareTo(C) > 0.
A.compareTo(B) == 0 then
B.compareTo(Z) gives the same result, no matter what Z is.
The classes that come with Java follow these rules. If you write a class that implements
Comparable, you need to follow these rules. This is not hard to do because most sensible
compareTo()methods will do this naturally.
Is it then true that