Reference

Reference

Implement the class ReferenceManager. Include the following two methods:

1. copyValue(Node obj). This would just copy the value from parameter obj to the public attribute node. But obj and node are still two difference instances / objects.
2. copyReference(Node obj). This would copy the reference from obj to node. So that both node and obj are point to the same object.

Example

ReferenceManager ref = ReferenceManager();

Node obj = new Node(0);

ref.copyValue(obj);

ref.node.val; // will be 0

ref.node; // will be different with obj.

Node obj2 = new Node(1);

ref.copyReference(obj2);

ref.node.val; // will be 1

ref.node; // will be the same with obj2

/**
 * Definition of Node:
 * class Node {
 *     public int val;
 *     public Node(int val) {
 *         this.val = val;
 *     }
 * }
 */
public class ReferenceManager {
    public Node node;

    public void copyValue(Node obj) {
        // copy value from obj to node
        node = new Node(obj.val);
    }

    public void copyReference(Node obj) {
        // copy reference from obj to node
        node = obj;
    }
}