java.util.Date clone or copy to not expose internal reference

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If it’s definitely just a Date, it won’t make any difference either way.

If the actual object might be a subclass of Date (such as java.sql.Date) then I’d hope that clone() would preserve the extra information (including which class it is) whereas calling the constructor wouldn’t.

As an aside, if you used Joda Time you wouldn’t have this problem, as there are plenty of immutable types to use. It’s also a much better API 🙂

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