Session Details

Week 1, Session 3 — Thu Dec 2

Reading

1. Big Java, §2.8–2.10
2. First two pages of this intro to UML Class Diagrams
3. Big Java, §3.1–3.8, Pay particular attention to §3.8

HW Due

1. HW 2

Topics

1. API documentation, Javadoc
2. Unit tests with JUnit
3. Object references
4. Object-Oriented Encapsulation
5. Implementing Classes in Java
   • Fields, Constructors, Methods
   • Implementing an Interface
   • Documented Stubs
   • Test-first Programming, JUnit tests

Resources

1. Slides
2. Example code implementing classes
3. Moving from JUnit 3.8 to 4 (ignore if you don’t already know JUnit 3.8)

Outline

1. [5] Questions
2. [5] Javadocs
3. [15] Javadoc exercise (add comments to StringMethodsPractice in JavadocsAndUnitTesting project), then summary.
4. [10] Unit testing with JUnit. Examine JUnitMoveTester in JavadocsAndUnitTesting project.
5. [15] JUnit exercise: create and implement StringMethodsPracticeTest in JavadocsAndUnitTesting project.
6. [10] Object references, assignment, box and pointer diagrams
7. [5 min] OO encapsulation
8. [5 min] Break
9. [20 min] Java classes. Live coding on implementing a class: implement Shouter and add a test to ShouterTest in the WordGames project, as specified in the WordGames instructions.
   • Fields, Constructors, Methods
   • Overloading
   • Visibility (public, private)
   • Public Interface vs. Private Implementation
   • The this Keyword: Implicit vs. Explicit Parameters
   • Fields vs. Parameters vs. Local Variables
   • Implementing an Interface
   • Using Documented Stubs
   • Test-first Programming, JUnit tests
10. [15 min] More live coding on implementing a class: implement Censor and add a test to CensorTest in the WordGames project, as specified in the WordGames instructions.
    • Fields: when you need one, how you declare one, how you initialize one
    • Constructors: writing and calling

HW Assigned

1. HW 3