Chapters for test 2

GUI: chapter 17 (all sections)
Searching: section 11.3
Sorting: section 12.2 (note: we covered a different implementation of quicksort)
compareTo interface: section 13.1
Inner classes: section 13.2
Generics: section 14.2
Linked lists: section 15.1
Stacks, queues, and doubly linked lists: section 15.4