@Override
public void addAtPosition(Object data, int position) {
// TODO Auto-generated method stub
if (position == 0) {
addFront(data);
return;
}
if (position >= this.length()) {
addBack(data);
return;
}
Node newNode = new Node(data);
if (this.head == null && this.tail == null) {
this.head = newNode;
this.tail = newNode;
} else {
Node current = this.head;
Node previous = this.head;
int counter = 0;
while (current != null) {
if (counter == position) {
previous.setNext(newNode);
newNode.setPrev(previous);
newNode.setNext(current);
current.setPrev(newNode);
break;
}
previous = current;
current = current.getNext();
counter++;
}
}
}
@Override
public void addFront(Object data) {
// TODO Auto-generated method stub
Node newNode = new Node(data);
if (this.head == null) {
this.head = newNode;
} else {
Node tempHead = this.head;
newNode.setNext(tempHead);
tempHead.setPrev(newNode);
this.head = newNode;
}
}
public void addBack(Object data) {
// TODO Auto-generated method stub
Node newNode = new Node(data);
if (this.head == null && this.tail == null) {
this.head = newNode;
this.tail = newNode;
} else {
Node tempTail = this.tail;
tempTail.setNext(newNode);
newNode.setPrev(tempTail);
this.tail = newNode;
}
}
