public class Node{
    Node next;
    int data;

    public Node(int data){
        this.data = data;
    }

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

    public Node getNext(){
        return next;
    }

    public int getData(){
        return data;
    }

    public static void main(String[] args) {
        Node en = new Node(1);
        Node to = new Node(2);
        Node tre = new Node(4);
        
        en.setNext(to);
        to.setNext(tre);
        System.out.println(tre.next.getNext());

    }
}