Session Details

Week 1, Session 3 — Tue Sep 4

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

Resources

1. Slides

Outline

1. [5] Questions
2. [5] Javadoc Recap
3. [15] Unit testing with JUnit. Examine JUnitMoveTester in JavadocsAndUnitTesting project.
4. [20] JUnit exercise: create and implement StringMethodsPracticeTest in JavadocsAndUnitTesting project.
5. [10] Object references, assignment, box and pointer diagrams
6. [5 min] OO encapsulation
7. [5 min] Break
8. [15 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
9. [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
10. [10 min] Begin homework (continue working per the WordGames instructions).

HW Assigned

1. HW 3