added the LLnode implementation

Author: prakashn27

Linked-Lists/LinkedListNode.java

@@ -0,0 +1,48 @@
+/*
+Linked List Implementation
+@author: [email protected]
+*/
+
+class LinkedListNode {
+	int data;
+	LinkedListNode next;
+	LinkedListNode prev;
+
+	public LinkedListNode() {
+
+	}
+
+	public LinkedListNode(int d, LinkedListNode n, LinkedListNode p) {
+		data = d;
+		this.setNext(n);
+		this.setPrev(p);
+	}
+
+	public void setNext(LinkedListNode n) {
+		next = n;
+		if(n != null && n.prev != this) {
+			n.setPrev(this);			
+		}
+	}
+	public void setPrev(LinkedListNode p) {
+		prev = p;
+		if(p != null && p.next != this) {
+			this.setNext(p);
+		}
+	}
+
+	public String printNode() {
+		if(next != null) {
+			return data + ":" + next.printNode();
+		}
+		else
+			return ((Integer) data).toString();
+	}
+
+	public static void main(String[] args) {
+		LinkedListNode first = new LinkedListNode(10, null, null);
+		LinkedListNode sec = new LinkedListNode(20, null, null);
+		first.setNext(sec);
+		System.out.println(first.printNode());
+	}
+}