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Java Typing Practice: Binary Search Tree Insert and Traversal

Improve your Java typing speed and accuracy by practicing a realistic binary search tree implementation with classes, recursion, arrays, loops, and console output.

90s testintermediateCode passage

Instructions

Type the Java code exactly as shown. Preserve capitalization, indentation, braces, parentheses, semicolons, comments, and spacing. Focus on accuracy first, then build speed.

Timer01:30

WPM0

Accuracy100%

Progress0%

Mistakes0

Type here

Use Tab for ⇄ and Enter for ↵

class TreeNode {↵ int value;↵ TreeNode left;↵ TreeNode right;↵ ↵ TreeNode(int value) {↵ this.value = value;↵ }↵ }↵ ↵ class BinarySearchTree {↵ private TreeNode root;↵ ↵ public void insert(int value) {↵ root = insertNode(root, value);↵ }↵ ↵ private TreeNode insertNode(TreeNode node, int value) {↵ if (node == null) {↵ return new TreeNode(value);↵ }↵ ↵ if (value < node.value) {↵ node.left = insertNode(node.left, value);↵ } else if (value > node.value) {↵ node.right = insertNode(node.right, value);↵ }↵ ↵ return node;↵ }↵ ↵ public void printInOrder() {↵ printInOrder(root);↵ System.out.println();↵ }↵ ↵ private void printInOrder(TreeNode node) {↵ if (node == null) {↵ return;↵ }↵ ↵ printInOrder(node.left);↵ System.out.print(node.value + " ");↵ printInOrder(node.right);↵ }↵ }↵ ↵ public class Main {↵ public static void main(String[] args) {↵ BinarySearchTree tree = new BinarySearchTree();↵ int[] values = {50, 30, 70, 20, 40, 60, 80};↵ ↵ for (int value : values) {↵ tree.insert(value);↵ }↵ ↵ tree.printInOrder(); // 20 30 40 50 60 70 80↵ }↵ }

The passage stays in place while your typed text lines up directly on top of it. Tip: use `Tab` for `⇄` and `Enter` for `↵` while typing the passage.

Progress0%

Correct chars: 0Typed chars: 0Mistakes: 0Status: Ready

Java Typing Practice: Binary Search Tree Insert and Traversal

Java Typing Practice: Binary Search Tree Insert and Traversal

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