OO Programming in Java

Class 1 Material

Contact Info

Tom Poliquin


Work - 831-462-8294


Homework 75%

Attendance 25%

Holiday Issue


Quick Class Poll



Why are you here

What you expect to get out of course

If someone woke you up in the middle of the
night what language would you program in.

What this course is

Practical OO

Java Threads

Java AWT

Design Patterns

Network Intro

Not Java Guruland

Individual Class Overview

Homework Review

New Material


Quiz Review

Object Modeling in class
to prepare for homework coding.

Religious Material

Quick Definitions

Object Oriented Programming Data and Methods live together

Class Objects with certain characteristics live together

General OO

OO Benefits most often claimed

  • Faster application development at a lower cost

  • Decreased maintenance time

  • Less complicated and faster customizsation of programs

  • Higher quality code

Additional claimed benefits

  • Enables the development of a common GUI across all platforms

  • Handles the storage and manipulation of more complex data types.

  • Provides the infrastructure for distrubuted applications

What is OO Programming

  • OOP is a set of implementation techniques that can be done in any programming language and are very difficult to do in most programming languages

General Agreement on OOP

  • Strongly reflects software engineering ... information hiding and abstract data types

  • Better vehicle for reusing code

  • Produces more mailleable systems

  • Keeps the programmer in touch with the problem

Some people say ....

  • Demise of waterfall development.

  • Don't bother unless you have an OO language for final implementation

  • You can design and implement deep systems.

  • I'll never go back to conventional programing.

OO Principles

Workinng definitions

  • Object based - Objects only

  • Class based - Objects and Classes

  • Object oriented - Objects, Classes and Inheritance

3 ways to think of an object

  • The state of memory is accessible through the operations and only through the operations

  • Objects hava an inside and an outside

  • Personified data, antropomorphism, little people

Can these be objects

  • a bank account

  • a stack

  • an ADA package

  • a fraction

Why an object based view

  • Objects may resemble real world conterparts

  • People often think first of a thing, then what it can do.

  • Encapsulation facilitates enhancement

Classes are factories for new objects

  • Whale

  • BankAccount

  • DialogBox


Zoo Example