remove element from double linked list

doublylinkedlist

public class DoublyLinkedList {
	Node head;
	Node tail;

	public Node getHead() {
		return head;
	}

	public Node getTail() {
		return tail;
	}

	public void append(int d) {
		if (head == null) {
			head = tail = new Node(d);
		} else {
			Node n = new Node(d);
			tail.setNext(n);
			n.setParent(tail);
			tail = tail.getNext();
		}
	}

	public Node remove(int d) {
		if (head == null) return null;
		while (head != null && head.getData() == d) {
			Node next = head.getNext();
			if (next != null) next.setParent(null);
			head = next;
		}
		if (head != null) {
			Node prev = head;
			Node current = head.getNext();

			while (current != null) {
				if (current.getData() == d) {
					Node curNext = current.getNext();
					prev.setNext(curNext);
					if (curNext != null) curNext.setParent(prev);
					current = curNext;
				} else {
					prev = prev.getNext();
					current = current.getNext();
				}
			}
		}

		return head;
	}

	public void print() {
		while (head.getNext() != null) {
			System.out.print(head.getData() + " -> ");
			head = head.getNext();
		}
		System.out.println(head.getData());
	}
}
public class Node {
	private Node next;
	private Node parent;
	private Integer data;

	public Node(int d) {
		data = d;
	}

	public void setNext(Node n) {
		next = n;
	}

	public Node getNext() {
		return next;
	}

	public void setParent(Node n) {
		parent = n;
	}

	public Node getParent() {
		return parent;
	}

	public Integer getData() {
		return data;
	}
}