Is the LinkedList Java API redundant?

Question

Are the add , addLast , offer and offerLast in the LinkedList Java class the same? If so, why does the design of the API reduce the multiplicity for redundancy?

Answer 1

The LinkedList class implements the List and Deque . So the class must implement these four methods, although you are right, they do the same.

By the way, LinkedList not an API. If you use an interface, for example

 List<String> list = new LinkedList<>(); 

then you will not see the addLast , offer and offerLast .