/**
* Returns a string representation of the contents of the linked list, from the front to the back.
*
* @return a string representation of the linked list, from front to back
*/
public String toString() {
if (isEmpty()) {
return "";
} else if (getHead() == getTail()) {
// one element
return getHead().getElement().toString();
} else {
StringBuilder newString = new StringBuilder();
DLNode<T> placeHolder = getHead();
// loop through and build string node by node
while (placeHolder.getNext() != null) {
newString.append(placeHolder.getElement().toString());
placeHolder = placeHolder.getNext();
}
newString.append(placeHolder.getElement().toString());
return newString.toString();
}
}
/**
* {@inheritDoc}
*
* @return returns next element from list
*/
public DLNode<T> next() {
if (iterNode == null) {
// end of list so no more elements
throw new NoSuchElementException();
} else {
// increment iterNode and return previous value
DLNode<T> temp = iterNode;
iterNode = iterNode.getNext();
return temp;
}
}