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  1.  
  2. import java.util.Stack;
  3. class Node {
  4. 	public Node left;
  5. 	public int data;
  6. 	public Node right;
  7.  
  8. 	public Node(int val) { this.data = val;	}
  9.  
  10. 	@Override
  11. 	public String toString() {
  12. 		return this.data + "";	}
  13. }
  14.  
  15. /**
  16.  *Inorder Traversal using Stack 
  17.  * @author Prateek
  18.  */
  19.  class InorderStack {
  20. 	public void inorderTravese(Node root) {
  21.  
  22. 		if (root == null)
  23. 			return;
  24. 		Stack<Node> stack = new Stack<Node>();
  25.  
  26. 		Node current= root;
  27. 		while (true) {
  28. 			if(current!=null)
  29. 			{
  30. 				stack.push(current);
  31. 				current = current.left ;
  32. 			}
  33. 			else
  34. 			{
  35. 				if(!stack.isEmpty()){
  36. 					Node item = stack.pop() ;
  37. 					System.out.print(item + "\t");
  38. 					current=item.right;
  39. 				}
  40. 				else
  41. 					break;
  42. 			}
  43. 		}
  44. 	}
  45.  
  46.  
  47. 	public static void main(String[] args) {
  48. 		InorderStack obj = new InorderStack();
  49.  
  50. 		Node root = new Node(12);
  51. 		root.left = new Node(8);
  52. 		root.left.left = new Node(6);
  53. 		root.left.left.right = new Node(7);
  54. 		root.left.right = new Node(10);
  55. 		root.left.right.left = new Node(9);
  56.  
  57. 		root.right = new Node(16);
  58. 		root.right.left = new Node(14);
  59. 		root.right.left.right = new Node(15);
  60. 		root.right.right = new Node(20);
  61. 		root.right.right.left = new Node(18);
  62.          System.out.println("Inorder Traversal is :");
  63. 		obj.inorderTravese(root);
  64. 	}
  65. }
  66.  
Success #stdin #stdout 0.07s 380160KB
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Inorder Traversal is :
6	7	8	9	10	12	14	15	16	18	20
https://ideone.com/niZg04
language:
Java (12.0.1)
created:
11 years ago
visibility:
secret

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