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# Homework2Upload - 1 Write a non-recursive method to perform...

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1. Write a non-recursive method to perform an in-order tree traversal. Hint: There is an easy solution that uses a stack as an auxiliary data structure and a more complicated but elegant solution that uses no stack but assumes that two pointers can be tested for equality. public static void inorderTraversal (TreeNode node) { while (node.hasLeftChild) { node = node.left node.visit(). if (node.hasLeftChild)) then node = node.right while node.hasLeftChild { node = node.left(); } else { while node.parent != null && node = node.parent().right() node = node.parent(); } } } 2. For the set of keys {1, 4, 5, 10, 16, 17, 21}, draw binary search trees of height 2, 3, 4, 5, and 6. 4 1 5 1 1 1 2 4 1 5 1 1 1 2 4 1 5 1 1 1 2 Height =  Height =  Height =

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3. Create a node class for a tree whose nodes may have any number of children. This class must include both accessor and mutator methods for each data element of the class. public class TreeNode { String item; // The data in this node.
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