Held: Friday, 20 September 2013

Back to Outline 12 - Interfaces and Polymorphism. On to Outline 14 - Inheritance, Continued.

Summary

We consider the third key concept in object-oriented programming: Inheritance.

Related Pages

• Reading: Inheritance
• Lab: Inheritance
• EBoard (Source) (PDF)

Overview

• More on the text block example.
• Inheritance basics.
• Lab.

Administrivia

• Warning! It's Friday the 13th (class)
• Reading for Tuesday: Documentation with Javadoc
• EC Opportunities
  • CS Extras Thursday @ 4:30: Jennelle Nystrom on Microsoft
  • CS Table Friday (pair programming)
  • CS Table Friday next (The Story of Mel, A Real Programmer)
  • Other?
• I'm trying to do very little lecture today. We'll see if I succeed.
• Are there questions on HW4?

More on the Text Block Example

• How to build text blocks, reviewed:
  • One line of text
  • Vertically compose two text blocks
  • Put a box around a text block
• We'll try a few more quick examples (or at least I hope we will).
• What are the big concepts you see in this example?

Inheritance

• Define one class in terms of another
  • Automatically "inhherit" fields and methods
  • Can add fields and methods
  • Can override fields and methods
• A transition in philosohpy from Plato to Aristotle
• A technique for code reuse
• Also supports polymorphism

Lab

• We may even reflect a bit at the end.