Determine the correctness of the MyLinkedList generic class code below. public class MyLinkedList { private MyNode first; public E getFirst() { return first.data; } private class MyNode { private E data; private MyNode next; } } A)the inner class MyNode cannot be private B)MyNode cannot refer to type variable E C)first.data will cause a compiler error D)the code is correct

Question

Determine the correctness of the MyLinkedList generic class code below.
public class MyLinkedList<E>
{
private MyNode first;
public E getFirst() { return first.data; }
private class MyNode
{
private E data;
private MyNode next;
}
}
A)the inner class MyNode cannot be private
B)MyNode cannot refer to type variable E
C)first.data will cause a compiler error
D)the code is correct

Quizplus · Accepted Answer

The code is correct as it stands. The inner class `MyNode` can be private and still be accessed by the outer class `MyLinkedList`. `MyNode` can refer to the type variable `E` because it is within the scope of `MyLinkedList`, which defines `E`. Accessing `first.data` will not cause a compiler error because `first` is of type `MyNode`, which has a `data` field of type `E`.

Determine the Correctness of the MyLinkedList Generic Class Code Below