試題詳解

11. public class Person{ 

12. private name；

 13. public Person(String name){

 14. this.name = name； 

15. }

 16. public int hashCode(){

 17. return 420； 

18. } 

19. } 

Which statement is true?
(A) The time to find the value from HashMap with a Person key depends on the size of the map.
(B) Deleting a Person key from a HashMap will delete all map entries for all keys of type Person.
(C) Inserting a second Person object into a HashSet will cause the first Person object to be removed as a duplicate.
(D) The time to determine whether a Person object is contained in a HashSet is constant and does NOT depend on the size of the map.