CPSC 330, January 23, 2009

News

• Worm Infects Millions of Computers Worldwide
• Clock ticking on worm attack code
• Conficker From Wikipedia, the free encyclopedia

Making your computer green:

• How To Make Your Computer More Green
• Blackle - Does it Really Save Energy?

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Review

• Read review notes for Java Use the classes Greeter and GreeterTester to produce software that will execute. Produce the JavaDoc documentation for it as well. Send me links to software and the documentation.
• Read Chapter 1 of the required text, do the exercises and activities and bring your answers in on Wednesday. You won't have to turn the answers in but I'll be expecting you, if called on, to put your answers on the board and/or discuss the answers by you or others.

About Java Interface

• What is an Interface?
• Lesson: Interfaces and Inheritance

Abstract Class

• interface vs abstract class : Java Glossary
• Java Abstract class and Interface

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JavaDoc

Prepare your work to include appropraite documentation as spelled out in the SUN style guide for JavaDoc

• How to Write Doc Comments for the Javadoc Tool

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Chapter 1 mentions several design principles

Design Principle

• Identify the aspects of your application that vary and separate them from what stays the same. All patterns provide a way to let some part of a system vary independently of all other parts.

Design Principle

• Program to an interface, not an implementation.

Design Principle

• Favor composition over inheritance

How are these demonstrated??

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Chapter 1 gives an example of the strategy pattern

The Strategy Pattern defines a family of algorithms, encapsulates each one and makes them interchangeable. Strategy lets the algorithm vary independently from clients that use it.

How is this demonstrated?

For Monday - set up a class for Muscovy duck. Some sources say it is a quackless duck. It certainly looks like it could fly.

Write an application similar to MiniDuckSimulator.java that shows off the features of a Mallard and a Muscovy duck.

The Brain Power item on page 23 asks "How would you implement your own duck call that does not inherit from the Duck class? " Write an implementation of a duck call class that does not inherit from the Duck class, and write an application to demonstrate it.

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This work is licensed under a Creative Commons License.
Ernest Ackermann Department of Computer Science, Mary Washington College
CPSC 110 | CPSC 330 | CPSC 401

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