試題詳解

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.