Code Samples for SE 2811, Hasker's Section

• SimpleIO.java: code illustrating reading and writing from the console.

• bee_simulator.zip: JavaFX code illustrating displaying an image and using arrow keys to move it on a panel

• SimpleLinkedList.java, SimpleQueue.java, GenericQueue.java: code for applying adapter pattern (see note 2)

• TestReflection.java: code using reflection to bypass private access restriction

• Code illustrating threads:
  • Count2000.java: failed attempt to add 1000 to 1000
  • GranularCounter.java: using fine-grained concurrency (with synchronized) to show 1000+1000=2000.
  • dblcounter.zip: JavaFX project showing what happens if you have unprotected counters. Add synchronized operations in UpCounter1.java and UpCounter2.java to improve the behavior, but note that there are still GUI errors due to form updates not being "thread safe"; would need to use Platform.runLater in valueOf and setTo to avoid this problem; eg:

            Platform.runLater(() -> {target.setText(value + "");})
    

• Code illustrating subject/observer (or publish/subscribe): weather-observer.zip

• Decorator pattern: decorator_initial.zip

• Bare bones command pattern: pbook.zip See pbook/PhoneBook.java for instructions running the tests from the command prompt. This version has no interface.

• Full phonebook with GUI: myphonebook.zip
  This version supports adding and removing entries along with undo and redo. ("yap" = "Yet Another Phonebook")

• RMI Example: illustrates using RMI to increment a simple counter remotely.

• TicTacToe RMI Example: illustrates using RMI on a more complex example.

• time.zip: Time/Clock example illustrating the Factory pattern