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Binary Tree search animation

Binary Tree search animation. Act 1: Looking for something in the tree. root. a 0. a 0. left data right. 6. a 2. a 1. a 1. a 2. left data right. left data right. 7. 3. a 4. a 3. a 3. a 4. left data right. left data right. 4. 2.

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Binary Tree search animation

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  1. Binary Tree search animation (c) Eraj Basnayake

  2. Act 1: Looking for something in the tree (c) Eraj Basnayake

  3. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  4. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 searchHelper target node a0 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  5. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 searchHelper target node a0 4 searchHelper target node a1 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  6. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 searchHelper target node a0 4 searchHelper target node a1 4 searchHelper target node a4 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  7. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 searchHelper target node a0 4 searchHelper target node a1 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class true (c) Eraj Basnayake

  8. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 searchHelper target node a0 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class true (c) Eraj Basnayake

  9. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class true (c) Eraj Basnayake

  10. the end Act 2: Looking for something not in the tree (c) Eraj Basnayake

  11. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 5 in the tree. search item 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  12. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 5 in the tree. search item 5 searchHelper target node a0 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  13. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 searchHelper target node a1 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  14. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 searchHelper target node a1 5 searchHelper target node a4 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  15. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 searchHelper target node a1 5 searchHelper target node a4 5 searchHelper target node 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class (c) Eraj Basnayake

  16. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 searchHelper target node a1 5 searchHelper target node a4 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class false (c) Eraj Basnayake

  17. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 searchHelper target node a1 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class false (c) Eraj Basnayake

  18. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 5 searchHelper target node a0 5 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class false (c) Eraj Basnayake

  19. root a0 a0 left data right 6 a2 a1 a1 a2 left data right left data right 7 3 a4 a3 a3 a4 left data right left data right 4 2 Searching for the value 4 in the tree. search item 4 public class BST implements BinarySearchTree{ … public boolean search(Comparable item){ return searchHelper(item,root); } private boolean searchHelper(Comparable target, TreeNode node){ if (node == null) return false; if (target.compareTo(node.data) == 0) return true; if (target.compareTo(node.data) > 0) return searchHelper(target,node.right); return searchHelper(target, node.left); } }//class false (c) Eraj Basnayake

  20. the end (c) Eraj Basnayake

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