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Given： Which statement is true？（）
A:Compilation fails because the hashCode method is not overridden.
B:A HashSet could contain multiple Person objects with the same name.
C:All Person objects will have the same hash code because the hashCode method is not overridden.
D:If a HashSet contains more than one Person object with name="Fred"， then removing another Person，also with name="Fred"， will remove them all.

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出自：Oracle认证

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