...
Never violate any of the first three conditions when implementing the compareTo() method. Implementations should conform to the fourth condition whenever possible.
Noncompliant Code Example (rock-paper-scissors)
This program implements the classic game of Roshamborock-paper-scissors, using the compareTo() operator to determine the winner of a game.
...
However, this game violates the notion of transitivity, because Rock beats Scissors, Scissors beats Paper, but Rock does not beat Paper.
Compliant Solution (rock-paper-scissors)
This compliant solution implements the same game, but does not use the Comparable interface.
...