public boolean hasNext() {
boolean val = true;
if (currentNode.getNext() == null) {
val = false;
}
return val;
// if we have no dummy node, return currentNode == null
}
public void remove() {
currentNode = currentNode.getNext();
}
public E next() {
E data = (E) currentNode.getData();
currentNode = currentNode.getNext();
return data;
}