How to find nth element from the end of a singly linked list?

Question

The following function is trying to find the nth to last element of a singly linked list.

For example:

If the elements are

Answer 1

In java i will use-

public class LL {
  Node head;
  int linksCount;

   LL(){
     head = new Node();
     linksCount = 0;
   }

  //TRAVERSE TO INDEX
  public Node getNodeAt(int index){
    Node temp= head;
    if(index > linksCount){
        System.out.println("index out of bound !");
        return null;
    }
    for(int i=0;i