Java Collection (LinkedList Concepts) -


when declare linkedlist like:

list<string> names = new linkedlist<string>();

it not support of linkedlist's special methods (ex: names.peeklast(), names.pollfirst() )

but when declare like:

linkedlist<string> names = new linkedlist<string>();

then supports these methods.

yes, obvious reason reference, linkedlist contains that's methods , list not have!

but question when want work linkedlist, 1 better , correct? or usage of them?

if need use linkedlist methods don't exist in list, should use linkedlist reference (you use list reference , cast linkedlist in order call linkedlist specific methods, make less sense).

otherwise, preferable use list interface holding reference, since makes code more generic, since won't depend on specific list implementation.


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