/**
* Returns a string representation of the list
*
* @return s string representation of the list
*/
@Override
public String toString() {
String s = "[ ";
DLNode<E> v = self.header.getNext();
while (v != self.trailer) {
s += v.getElement();
v = v.getNext();
if (v != self.trailer) {
s += ", ";
}
}
s += " ]";
return s;
}
/**
* Returns the node after the given node v. An error occurs if v is the trailer
*
* @param v the current node we are looking to get the next node of
*/
public DLNode<E> getNext(DLNode<E> v) throws IllegalArgumentException {
if (v == self.trailer) {
throw new IllegalArgumentException("Cannot move forward past the trailer of the list");
}
return v.getNext();
}