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Asked: 2026-05-21T12:36:32+00:00

Collection col = new LinkedList(); Is there a way to call col.addFirst ?

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Collection col = new LinkedList();

Is there a way to call col.addFirst ?

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  1. Editorial Team

    Yes, if you cast to LinkedList:

    ((LinkedList) col).addFirst(..)

    But this is discouraged, because you don’t always know the concrete type of the collection. You can check with instanceof, but that is not good object oriented code. If you really require a LinkedList, require a LinkedList (rather than Collection)

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