Question

Why is the answer 10 and 0 (respectively - two different answers, one is 10 and the second one is 0)? I don't know how to trace this. Please don't be too complex in your explanation.

Consider the following class public class Node {     private int item;     private Node next;         public Node() {         this(0);     }     public Node(int item) {         this(item, null);     }     public Node(int item, Node next) {         this.item = item;         this.next = next;     }     public int getItem() {         return item;     }     public void setItem(int item) {         this.item = item;     }     public Node getNext() {         return next;     }     public void setNext(Node next) {         this.next = next;     } } What printed on the console after the following lines are exectued (ignore the new line characters): Node node1 = new Node(10); Node node2 = new Node(); System.out.println("node1 -> item = " + node1.getItem()); System.out.println("node2 -> item = " + node2.getItem()); Answer: node1 -> item = [1] (answer here is 10) node2 -> item = [2] (answer here is 0)

Answer 1

Answer:

Node node1 = new Node(10);
This calls the constructor public Node(int item).
which assigns 10 to item and null to next

Node node2 = new Node();
This calls the default constructor public Node().
which assigns 0 to item and null to next

so, node1->item is 10
and node2->item is 0