DS for tree and link list

public class Node {
private int data;
 private Node right;
 private Node left;

 Node() {
 }

 Node(int data) {
  this.setData(data);
  this.setLeft(null);
  this.setRight(null);
 }

 public int getData() {
  return this.data;
 }

 public Node getRight() {
  return this.right;
 }

 public Node getLeft() {
  return this.left;
 }

 public void setData(int data) {
  this.data = data;
 }

 public void setRight(Node right) {
  this.right = right;
 }

 public void setLeft(Node left) {
  this.left = left;
 }
}




/* Helper class for all Linked list data structures */

class LinkNode {

 private int data;
 private LinkNode link;

 LinkNode() {
 }

 LinkNode(int data) {
  this.setData(data);
  this.setLink(null);
 }

 public int getData() {
  return this.data;
 }

 public LinkNode getLink() {
  return this.link;
 }

 public void setData(int data) {
  this.data = data;
 }

 public void setLink(LinkNode link) {
  this.link = link;
 }
}