Downloads for/from Lecture:
Week1: currency
Week2: ArrayList, SetADT, Iterator, LineReader,
and WordReader
Week3: SetADT, ArraySet, Iterator
Week4: LinkedSet and OrderedLinkedSet
Week5: Introduction to Stacks and Postfix
Expression Evaluation
Week8: Recursion
Week10: Binary Trees
Week11: Binary Search Trees
Week13: Heaps and HeapSort
Week14: Hash Tables