CODEWITHSUNDEEP
javalinked-list
cyo
cyo

Reputation: 193

Implementation of own LinkedList

I am implementing my own LinkedList. I've a class which calls MyLinkedLlist, inside MyLinkedList only size() and iterator() have been implemented. Besides I've one Abstract class where all my other necessary functions for LinkedList in. The abstract class prototype is:

public abstract class MyAbstractSequentialList implements List

I wonder if I need to implement equals() method inside my abstract class or it is already implemented for me because of I inherit List?

Upvotes: 3

Views: 337

Answers (3)

Sheel
Sheel

Reputation: 845

List is an interface so if you want to implement in your own LinkedList so you have to override means implement equals() because there is contract with interface if you are implementing then you have to implements its methods as well.

Upvotes: 1

Chandra Sekhar
Chandra Sekhar

Reputation: 19492

List is an interface and equals() is not implemented in List because all methods in any interface should be abstract.

So you have to implement equals() method in your abstract class. if not, you have to implement it in any subclass which extends your abstractclass.

Upvotes: 1

Samarth Bhargava
Samarth Bhargava

Reputation: 4228

List is an interface. So, there won't be any default implementation. You can choose to implement one if you need. Note that if you override equals, you must override hashcode as well.

Upvotes: 5

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