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Sample Java

The sample code below is written using only those language features that are known at the time the code is discussed. Much of the code could be improved, using more advanced Java language features. In some cases, multiple solutions are given to show how a more advanced Java language feature can be used to improve a solution.

Paint a checker board and view it in a JFrame

Approximating Pi via a Monte Carlo method Application.java MonteCarloJPanel.java

AnimatedJPanel.java (rotating cube)

Solar System

Cellular Automaton - Life

Chat client - example of GUI design

A recursive bijective map, T: N —> rooted, unoriented trees (view as String)

A recursive bijective map, β: Z+ —> rooted, unoriented trees (view as Image)

Solar system animation with multithreaded recording and animated playback

Thread-safe blocking queue—written before generics & java.util.concurrent package

Networking: A simple stream-socket client-server chat application.

A database hello, world! example

A database hello, world! example using JdbcRowSet

A PreparedStatement example of a range query (Mandelbrot set)

JUnit test of a stack Stack StackTest

JUnit: Simple unit test of PositiveIntegerTree.java

Graphics: {draw | fill}Arc

Graphics: {draw | fill}Polygon

Reading from & writing to a text file. GraphIO reads a graph from a text file & writes its graph to a text file. Refactoring it into a reusable class for text file processing yields: A Processor interface A TextFileProcessor class A refactored Graph class that implements Processor & uses TextFileProcessor.

Illustrating recursively defined methods.

Generic Clases & Methods Generic Stack Wild card illustration

Laboratory Assignment Solutions

1. Classes: HeartRates class
2. Exceptions:
3. • IntegerOptionPane class
   • BoundedIntegerOptionPane class
4. • GUI Components: App class
   • Controller class
5. Strings: Morse Encoding
6. Recursion: GCD - instrumented to illustrate recursion
7. Generic class: Pair
8. JUnit
   • Queue
   • QueueTest

Programming Assignment & Solutions

Assignment	Solution
Visualize an n-clique	Procedural solution Object-oriented solution Clique class Node class
A Graphical Virtual Machine	App.java GVM.java View.java ControlPanel.java
Zap 'em! An animated Game	App.html Game.html View.html ControlPanel.html 56-2014-3-Zapem.jar
SuperZap 'em! A Modestly Enhanced Zap 'em Game	App.html Game.html View.html ControlPanel.html Critter.html SquareCritter.html RoundCritter.html WowCritter.html PacManCritter.html StarCritter.html
GALA: GVM Assembly Language	App.html Assembler.html ControlPanel.html GVM.html Instruction.html TextFileReader.html View.html