非递归代码如下: 1publicArrayList<Integer> inorderTraversal(TreeNode root) { 2ArrayList<Integer> res =newArrayList<Integer>(); 3if(root ==null) 4returnres; 5LinkedList<TreeNode> stack =newLinkedList<TreeNode>(); 6while(root!=null|| !stack.isEmpty()){ 7if(root!=null){ 8stack.push(root...
* public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ classSolution { public List<Integer>inorderTraversal(TreeNode root) { List<Integer> traversal = new ArrayList<>(); Stack<TreeNode> stack = new Stack<>(); TreeNode...
* traverse the binary tree on InOrder traversal algorithm */publicvoidinOrder(){inOrder(root);}privatevoidinOrder(TreeNodenode){if(node==null){return;}inOrder(node.left);System.out.printf("%s ",node.data);inOrder(node.right);}publicvoidinOrderWithoutRecursion(){Stacknodes=newStack<>();T...
* Java Program to traverse a binary tree * using inorder traversal without recursion. * In InOrder traversal first left node is visited, followed by root * and right node. * * input: * 4 * / \ * 2 5 * / \ \ * 1 3 6 * * output: 1 2 3 4 5 6 */ publicclassInOrderTrav...
Here is our complete solution to the inorder traversal algorithm in Java. This program uses a recursive algorithm to print the value of all nodes of a binary tree usingInOrdertraversal. As I have told you before, during the in-order traversal value of the left subtree is printed first, fo...
importjava.util.ArrayList;importjava.util.List;/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */publicclassSolution{public List<Integer>inorderTraversal(TreeNode root){ArrayList<...
Let’s see how to implement these binary tree traversals in Java and what is the algorithm for these binary tree traversals. 2.1. Inorder Binary Tree Traversal In the in-order binary tree traversal, we visit the left sub tree than current node and finally the right sub tree. Here is the...
Ordertraversal algorithm in Java or any programming language is by using recursion. Since the binary tree is a recursive data structure, recursion is the natural choice for solving a tree-based problem. TheinOrder()method in theBinaryTreeclass implements the logic to traverse a binary tree using...
Binary Tree InOrder traversal in Java without Recursion The steps for inorder traversal will remain the same with recursion and without it. The key is how to use a Stack to convert a recursive algorithm to an iterative one. Since we need to explore the left tree, we start with the root...
Inorder Traversal:Sample Solution:Java Code:class Node { int key; Node left, right; public Node(int item) { // Constructor to create a new Node with the given item key = item; left = right = null; } } class BinaryTree { Node root; BinaryTree() { // Constructor to create an ...