@Override
  public boolean deleteAtPosition(int position) {
    // TODO Auto-generated method stub
    if (position == 0) {
      return deleteFront();
    }
    if (position == this.length() - 1) {
      return deleteBack();
    }

    if (this.head == null && this.tail == null) return false;
    else {
      if (head.getNext() == null) {
        head = null;
        tail = null;
        return true;
      } else {
        Node current = this.head;
        Node previous = this.head;
        int counter = 0;
        while (current.getNext() != null) {
          if (counter == position) {
            previous.setNext(current.getNext());
            current.getNext().setPrev(previous);
            return true;
          }
          previous = current;
          current = current.getNext();
          counter++;
        }
        return false;
      }
    }
  }
 @Override
 public boolean deleteFront() {
   // TODO Auto-generated method stub
   if (this.head == null && this.tail == null) return false;
   else {
     if (head.getNext() == null) {
       head = null;
       tail = null;
       return true;
     } else {
       head = head.getNext();
       this.head.setPrev(null);
       return true;
     }
   }
 }
  @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 Node get(String dataIn) {
   // TODO Auto-generated method stub
   if (this.head == null) return null;
   else {
     Node current = this.head;
     while (current != null) {
       if (dataIn == current.getData().toString()) return current;
       current = current.getNext();
     }
     return null;
   }
 }
 @Override
 public boolean deleteBack() {
   // TODO Auto-generated method stub
   if (this.head == null) return false;
   else {
     if (head.getNext() == null && this.tail == null) {
       head = null;
       tail = null;
       return true;
     } else {
       Node current = this.head;
       while (current.getNext() != null) {
         if (current.getNext().getNext() == null) {
           current.getNext().setPrev(null);
           current.setNext(null);
           this.tail = current;
           return true;
         }
         current = current.getNext();
       }
       return false;
     }
   }
 }
  @Override
  public Node getAtPosition(int position) {
    // TODO Auto-generated method stub
    if (position == 0) return getFront();
    if (position == this.length() - 1) return getBack();

    if (this.head == null) return null;
    else {
      Node current = this.head;
      int counter = 0;
      while (current != null) {
        if (counter == position) return current;
        current = current.getNext();
      }
      return null;
    }
  }