单选题
发布日期:2020-04-10
Compilation fails because the hashCode method is not overridden.
A HashSet could contain multiple Person objects with the same name.
All Person objects will have the same hash code because the hashCode method is not overridden.
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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