You intend to use a hash set with your own object class.Which of the following statements is correct?
A)You cannot override the hashCode method in the Object class.
B)You can use the hash method of the Objects class to create your own hashCode method by combining the hash codes for the instance variables.
C)You can override the hash method for your class provided that it is compatible with its equals method.
D)Your class's hashCode method does not need to be compatible with its equals method.

Question

Quizplus · Accepted Answer

In order to use a hash set with a custom object class, you need to override both the hashCode and equals methods. The hashCode method needs to be compatible with the equals method, meaning that if two objects are equal according to their equals method, they should return the same hashCode. It is not necessary to use the hash method of the Objects class to create your own hashCode method, as long as your implementation is consistent and predictable. Option A is incorrect because you can override the hashCode method in your custom object class. Option B and D are both partially incorrect and incomplete explanations.

You Intend to Use a Hash Set with Your Own