Question

Write the following method in the class BinaryTree

int distance(BTNode node1, BTNode node2) The method returns the distance from node 1 to node 2 in the tree. If one of the nodes is not in the tree, the method throws IllegalArgumentException

Answer 1

The method distance in the BinaryTree class calculates the distance between two nodes in a binary tree. The method takes two BTNode objects, node1 and node2, as parameters. It returns the distance from node1 to node2 in the tree.

Step-by-step explanation:

The method distance in the BinaryTree class calculates the distance between two nodes in a binary tree. The method takes two BTNode objects, node1 and node2, as parameters. It returns the distance from node1 to node2 in the tree.

To calculate the distance between the two nodes, you can use any algorithm that traverses the tree, such as depth-first search (DFS) or breadth-first search (BFS).

The algorithm should keep track of the path from node1 to node2 and return the number of edges in the path. If either node1 or node2 is not found in the tree, the method should throw an IllegalArgumentException to indicate the invalid input.