"Incompatible types" error though types are same generic type

[wdh3rd]

Hello everyone,

Even though two methods both use the generic return type - E - I'm
getting an error saying that they're incompatible types. Here's the
truncated code:

public class CircularLinkedList<E> extends AbstractList<E> {

private class Node {

private E element;

public E element () {
return this.element;
}
} //end Node

private class CircularLinkedIterator<E> implements
dataStructs.Iterator<E> {

private Node current;

public Node current () {
return this.current;
}

public E get () {
return current.element(); //error is at this line
}
} //end CircularLinkedIterator

}//end CircularLinkedList


The error that I receive reads:

Error: incompatible types
found: E
required: E

I'm at a loss for understanding why the same generic types could
render an incompatible types error. Can anyone shine some Java
wisdom?? Thanks for any help anyone can offer.

 

[wdh3rd]

Sorry, I forgot to mention that the AbstractList<E> that is being
extended by the CircularLinkedList<E> is not the AbstractList<E> from
the Java API, but my own AbstractList<E>.

 

[Peter Sestoft]

Even though two methods both use the generic return type - E - I'm
getting an error saying that they're incompatible types. Here's the
truncated code:

public class CircularLinkedList<E> extends AbstractList<E> {
private class Node {
...
} //end Node

private class CircularLinkedIterator<E> implements dataStructs.Iterator<E> {
...
public E get () {
return current.element(); //error is at this line
}
} //end CircularLinkedIterator

}//end CircularLinkedList

You have two distinct type parameters both called E.

Peter

 

[wdh3rd]

You have two distinct type parameters both called E.

Peter

Thanks. I hadn't thought of that. I made the CircularLinkedIterator
non-generic and everything seems to be kosher now.