BINARY TREE FILE package com.binarytree; public class BinaryHeap { private int d

Question

BINARY TREE FILE

package com.binarytree;

public class BinaryHeap {

   private int data;
   private BinaryHeap left;
   private BinaryHeap right;
      
   public BinaryHeap(int x) {
       data = x;
       left = null;
       right = null;
   }

   public int getData() {
       return data;
   }
   public void setData(int data) {
       this.data = data;
   }
   public BinaryHeap getLeft() {
       return left;
   }
   public void setLeft(BinaryHeap left) {
       this.left = left;
   }
   public BinaryHeap getRight() {
       return right;
   }
   public void setRight(BinaryHeap right) {
       this.right = right;
   }
}

BINARY SEARCH TREE FILE

package com.binarytree;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;

public class BinarySearchTree {

   private BinaryHeap root = null;
  
   /*
   * insert the new element 'x' into the BinarySearchTree
   * create a NEW BinaryHeap with data = 'x', left = NULL and right = NULL
   *
   * if root is NULL then
   *            insert the new BinaryHeap into root
   * else
   *            find the location where the NEW BinaryHeap has to be inserted
   *
   * @Param
   *        -   'x' - New integer
   */
   public void insert(int x) {
       BinaryHeap heap = new BinaryHeap(x);
       if(root == null) {
           root = heap;
       } else {
           BinaryHeap temp = root;
           BinaryHeap temp2 = null;
           while(temp != null) {
               temp2 = temp;
               if(temp.getData() > heap.getData()) {
                   temp = temp.getLeft();
               } else {
                   temp = temp.getRight();
               }
           }
          
           if(temp2.getData() > heap.getData())
               temp2.setLeft(heap);
           else
               temp2.setRight(heap);
       }
   }
  

MAIN

package com.binarytree;

import java.util.Iterator;
import java.util.List;

public class Main {

   public static void main(String[] args) {
       BinarySearchTree tree = new BinarySearchTree();
       tree.insert(5);
       tree.insert(3);
       tree.insert(2);
       tree.insert(10);
       tree.insert(8);
       tree.insert(12);
       tree.insert(14);

       List list = tree.levelOrderTravesal();
       iterator(list);

       System.out.println(" Delete : 14");
       tree.delete(14);

       list = tree.levelOrderTravesal();
       iterator(list);

       System.out.println(" Delete : 3");
       tree.delete(3);

       list = tree.levelOrderTravesal();
       iterator(list);

       System.out.println(" Delete : 10");
       tree.delete(10);

       list = tree.levelOrderTravesal();
       iterator(list);

       System.out.println(" Delete : 5");
       tree.delete(5);

       list = tree.levelOrderTravesal();
       iterator(list);
   }
  
   public static void iterator(List list) {
       if(list == null)

Explanation / Answer

public static class TreeNode   {     int data;     TreeNode left;     TreeNode right;     TreeNode(int data)     {      this.data=data;     }   }       // prints in level order   public static void levelOrderTraversal(TreeNode startNode) {     Queue queue=new LinkedList();     queue.add(startNode);            while(!queue.isEmpty())     {      TreeNode tempNode=queue.poll();      System.out.printf("%d ",tempNode.data);      if(tempNode.left!=null)       queue.add(tempNode.left);      if(tempNode.right!=null)       queue.add(tempNode.right);     }   }   public static void main(String[] args)   {     BinaryTree bi=new BinaryTree();     // Creating a binary tree     TreeNode rootNode=createBinaryTree();     System.out.println("Level Order traversal of binary tree will be:");     levelOrderTraversal(rootNode);   }       public static TreeNode createBinaryTree()   {          TreeNode rootNode =new TreeNode(40);     TreeNode node20=new TreeNode(20);     TreeNode node10=new TreeNode(10);     TreeNode node30=new TreeNode(30);     TreeNode node60=new TreeNode(60);     TreeNode node50=new TreeNode(50);     TreeNode node70=new TreeNode(70);          rootNode.left=node20;     rootNode.right=node60;          node20.left=node10;     node20.right=node30;          node60.left=node50;     node60.right=node70;          return rootNode;   }   }

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