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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�? in this compliant example, the Date object.
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