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Returning a Node in an abstract case (Java)

Your pop() method signature declares that you are returning a value of type E, but head is declared as a Node<E>, which is not the same. In any case, you probably don't want to return the Node itself. The fact that you are storing E in a Node is an implementation detail you don't need to expose to the user of your Stack class.

I would assume that the implementation of your Node class has some sort of method to pull the stored data out.

Try something like:

public E pop() {
    // don't forget to point head to the next Node
on the stack
    return head.getValue();

Categories : Java

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