...
Mutable classes that define a clone() method must be declared final. This ensures that untrusted code cannot declare a subclass that overrides the clone() method to create a spurious instance. The clone() method should copy all internal mutable state as necessary �������������€š�š�š�š�š�š�������������‚�š�š�š�š�š���������������‚�š�š�š�š�š�š��������������€š�š�š�š�š�š�? in this compliant example, the Date object.
...