CS241: Spring 2015 -- Lecture 22, Exam feedback, binary tree, BST, and tree sort

1. Exam feedback
   1. On encapsulation
   2. On preparing for the final (or for exams in general)
   3. Recap
2. Review: trees and BST and tree sort
3. Writing BinaryTree, and GenericBinaryTree
   1. As always
      1. representation: root, right, left
      2. operations:
         1. constructors
         2. accessors
         3. isEmpty()
         4. toString - plain & recursive
      3. Testing before use!!