Recursion
	Converting iteration to recursion, vice-versa
	PaintBucket/Fill example
Search (Linear/Binary)
Sorting (Bubble/Selection/Insertion/Merge/Quick)
	Stable?  In-place?  Which case is worst-case/best-case?
Lists (Array, SinglyLinked, DoublyLinked)
Stack, Queue
	Converting recursion to stack.
	Implementing.
Hashtables
	Histogram example
Testing
	Preconditions, postconditions.
	Assertions, the Java assert statement.
	Which values to test?
	Test procedure.
Threads
	Sleep, join, interrupt, user/daemon threads
Sockets
	Client/Server communication between two processes.