Class 06: Lab: Objects and Classes

Held Monday, September 4, 2000

Summary

Today we continue our exploration of classes and objects in Java by designing our own classes.

Notes

• Handouts:
  • Draft of Introductory Linux handout
• Happy Labor Day. I hope you enjoy laboring.
• Don't forget the brown-bag film at lunchtime.
• We'll work on lab J3 today and tomorrow.
• Wednesday's class will be a hybrid of discussion, recitation, and lecture.
• It may be a personal quirk, but I really get annoyed by email that comes from a name other than your own.
• Are there questions on homework 1?

Overview

• Lab J3
  • Preparation
  • Lab

Review

• We use classes in different ways.
  • Some classes provide templates for creating new objects.
  • Some classes provide a main method that serves as the ``script'' of your program.
  • Some classes collect utility methods.
  • Some classes do a combination of these things.
• Classes typically have many parts.
  • A comment that describes the purpose of the class.
  • Some fields
    • Some fields are associated with each object.
    • Some fields are associated with the class as a whole.
  • Some constructors
  • Some methods
    • Some methods are associated with each object.
    • Some methods are associated with the class as a whole.

Lab J3

Preparation

• See the review above.
• Are there any other questions?

Work

• Work on the lab.
• I encourage you to work in teams.

Reflection

• We'll leave reflection for tomorrow's class. However, be prepared to say something meaningful.