Data Abstraction (Chap 6)

9/12/01

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Table of Contents

Data Abstraction (Chap 6)

The class String

An example using String

Refined Palindrome Pseudocode

String is a bit special

String concatenation

String literals

Strings are immutable

A mutable class - StringBuffer

Passing Objects to methods

An Example: Playing Cards

Call by Value vs Call by Ref

Elements of a Simple Class

Objects in memory

Instance variables and methods

Accessing instance variables from outside the class breaks data hiding.

A better Counter.

public/private/default

Constructing objects

Adding constructors to Counter

Using constructors.

The ADT Stack in Java

Static fields and methods

Objects in memory

System.out.println()

Calling Methods

instance to instance

Why not static to instance?

The NON-OOP way to do it.

Problem: Simulate a poker game

OOD - CRC Cards

Using CRC Cards

CRC Cards for Checkers

Author: charlie

Email: charlie@cs.ucsc.edu

Home Page: http://www.cse.ucsc.edu/~charlie