11.1 Methods for Manipulating Arrays (java.util.Arrays)
  11.1.1 String Representation
  11.1.2 Sorting and Searching
 11.2 Uniform Data Access (java.util.ArrayList)
  11.2.1 Recording Data
  11.2.2 Accessing and Modifying Data
 11.3 Behavior-Based Data Access
  11.3.1 Last-In-First-Out Memory (java.util.Stacks)
  11.3.2 Deques (java.util: ArrayDeque, LinkedList)
  11.3.3 Priority Queues
 11.4 Hash-Based Data Access
  11.4.1 Hash Sets
  11.4.2 Hash Maps
 Assignment 6: Inverse a Dictionary (Due: Th, Nov 13)