CSSE 220: Object Oriented Software Development
Exam 2, Spring 2008-2009

What does this test cover?

• Object-oriented design (as in your VectorGraphics and Capstone projects):

  • What is cohesion? Does good OO design call for low cohesion or high cohesion? Why?
  • What is coupling? Does good OO design call for low coupling or high coupling? Why?
  • What are immutable classes? Does good OO design call for mutable classes or immutable classes? Why?
  • Why does OO design encourage the use of inheritance?
  • Why does OO design encourage the use of interfaces?
  • What are CRC cards and how are they used in OO design?
  • What are UML class diagrams and how are they used in OO design?

• arrays and ArrayLists (as in ArraysAndArrayLists):

  • Declaring and constructing arrays
  • Looping through arrays
  • Indexing into arrays
  • Declaring and constructing ArrayLists (with generics)
  • Looping through ArrayLists
  • Indexing into ArrayLists
  • Advantages of ArrayLists over arrays. Advantages of arrays over ArrayLists.
• Graphical User Interfaces using Swing: constructing and displaying JFrames, JPanels, JButtons, etc. (as in SwingDemo, VectorGraphics, Capstone project)
• Event-driven programming: responding to button-presses, mouse-clicks, etc. (as in SwingDemo, VectorGraphics, Capstone project):

  • How to respond to events
  • Style: Who should respond to an event?

• Implementing is-a relationships (as in SwingDemo, VectorGraphics, Capstone project):

  • How to pass objects to other objects:
    • Through constructors
    • Through setters
  • Why pass objects to other objects

• Polymorphism (as in lecture notes and your textbook):

  • What is polymorphism? Why is it helpful?
  • Why do you sometimes need to cast objects? What is the notation for doing so?
  • Why do you sometimes need to use the instanceof operator? What is the notation for doing so?

• Anonymous classes (as in lecture notes and your textbook):

  • How to write an anonymous class
  • Using variables from the outer class/method in the (inner) anonymous class
  • Why use anonymous classes

• Threads (as in ThreadsIntro and your Capstone project):

  • What is a thread?
  • Why use threads?
  • How do you use a Thread in Java

• Networking (as in NetworkingExamples and your Capstone project):

  • What is a client-server architecture? Why use it?
  • How do you construct a server and have it accept connections to Clients?
  • How does a Client connect to a Server?
  • How do you construct readers and writers for a Server or Client?
  • How do readers and writers send and receive messages to/from Servers/Clients?
  • What is blocking? Why is it dangerous? Which of the operations listed in previous subparts of this question might block? How do you deal with this?