﻿ Java - Find the maximum depth of a given a binary tree

# Java: Find the maximum depth of a given a binary tree

## Java Basic: Exercise-130 with Solution

Write a Java program to find the maximum depth of a given binary tree.
Sample Output: The Maximum depth of the binary tree is: 3

Sample Solution:

Java Code:

``````class Node {
int data;
Node left, right;

public Node(int item) {
// Constructor to initialize a node with given data
data = item;
left = right = null;
}
}

public class BinaryTree {
Node root;

public int maxDepth(Node root) {
// Recursive function to calculate the maximum depth of the binary tree
if (root == null)
return 0;
int left_Depth = maxDepth(root.left);
int right_Depth = maxDepth(root.right);
int bigger = Math.max(left_Depth, right_Depth);
return bigger + 1;
}

public static void main(String args[]) {
BinaryTree tree = new BinaryTree();
tree.root = new Node(55);
tree.root.left = new Node(21);
tree.root.right = new Node(80);
tree.root.left.left = new Node(9);
tree.root.left.right = new Node(29);
tree.root.right.left = new Node(76);
tree.root.right.right = new Node(91);

// Create a binary tree and calculate its maximum depth
System.out.println("The Maximum depth of the binary tree is: " + tree.maxDepth(tree.root));
}
}
```
```

Sample Output:

```The Maximum depth of the binary tree is: 3
```

Flowchart: Java Code Editor:

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