Barnes David John - Objects first with Java: a practical introduction using BlueJ

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If this access code has already been revealed, it may no longer be valid. If this is the case, you can purchase a subscription by going to http://www.pearsonhighered.com/barnes_kolling/ and following the on-screen instructions. Objects First with Java A Practical Introduction Using BlueJ David J. Barnes and Michael Klling University of Kent Fifth Edition Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montreal Toronto Delhi Mexico City Sao Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Editorial Director:Marcia HortonEditor in Chief:Michael HirschAcquisitions Editor:Tracy DunkelbergerEditorial Assistant:Chelsea BellDirector of Marketing:Patrice JonesMarketing Manager:Yez AlayanMarketing Coordinator:Kathryn FerrantiMarketing Assistant:Emma SniderDirector of Production:Vince OBrienManaging Editor:Jeff HolcombSenior Production Project Manager:Marilyn LloydManufacturing Buyer:Lisa McDowellArt Director/Cover Designer:Anthony GemmellaroCover Art:Photoshot Holdings Ltd / AlamyMedia Project Manager:John CassarFull-Service Project Management, Composition, and Art:IntegraPrinter/Bindery:Von Hoffman dba R.R. Donnelley/ Jefferson CityCover printer:Lehigh-Phoenix Color/Hagerstown Copyright 2012, 2009, 2006, 2005, 2003 by Pearson Education, Inc publishing as Prentice Hall. All rights reserved.

Manufactured in the United States of America. This publication is protected by Copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission(s) to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may fax your request to 201-236-3290. Many of the designations by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed in initial caps or all caps. Library of Congress Cataloging-in-Publication Data on file 10 9 8 7 6 5 4 3 2 1 ISBN 10: 0-13-249266-0 ISBN 13: 978-0-13-249266-9 To my wife Helen, thirty years and counting djb To Monica, for everything mkThis page intentionally left blankContents 2.3.1 Keywords 2.4.1 Fields 2.4.2 Constructors 2.5.1 Choosing variable names 2.1.1 Exploring the behavior of a nave ticket machine vi | Contents 4.4.1 Importing a library class 4.4.2 Diamond notation 4.4.3 Key methods of ArrayList 4.7.1 The effect of removal on numbering 4.7.2 The general utility of numbering with collections 3.8.1 Class NumberDisplay 3.8.2 String concatenation 4.8.1 Summary of the music 3.8.3 The modulo operator organizer 3.8.4 Class ClockDisplay 4.9.1 The for-each loop 4.9.2 Selective processing of a collection 3.11.1 Internal method calls 4.9.3 A limitation of using 3.11.2 External method calls strings 3.11.3 Summary of the 4.9.4 Summary of the clock display for-each loop 4.10.1 The while loop 3.12.1 The mail-system 4.10.2 Iterating with an index example variable 3.12.2 The this keyword 4.10.3 Searching a collection 4.10.4 Some non-collection 3.13.1 Setting breakpoints examples 3.13.2 Single stepping 3.13.3 Stepping into methods 4.12.1 Index access versus iterators 4.12.2 Removing elements Contents | vii 5.4.3 Generating random responses 4.14.1 Getting started with the 5.4.4 Reading documentation project for parameterized 4.14.2 The null keyword classes 4.14.3 The Lot class 4.14.4 The Auction class 4.14.5 Anonymous objects 5.6.1 The concept of a map 4.14.6 Chaining method calls 5.6.2 Using a HashMap 4.14.7 Using collections 5.6.3 Using a map for the TechSupport system 4.16.1 A log-file analyzer 4.16.2 Declaring array variables 4.16.3 Creating array objects 4.16.4 Using array objects 5.10.1 Using javadoc in BlueJ 4.16.5 Analyzing the log file 5.10.2 Elements of class 4.16.6 The for loop documentation 4.16.7 Arrays and the for-each loop 5.11.1 Information hiding 4.16.8 The for loop and iterators 5.11.2 Private methods and public fields 5.12.1 The scribble demo 5.12.2 Code completion 5.12.3 The bouncing-balls demo 5.2.1 Exploring the TechSupport system 5.2.2 Reading the code 5.13.1 The static keyword 5.13.2 Constants 5.3.1 Interfaces versus implementation 5.3.2 Using library-class methods 5.3.3 Checking string equality 5.4.1 The Random class 5.4.2 Random numbers with limited range viii | Contents 6.5.1 The task 7.3.1 Using inspectors 6.5.2 Finding the relevant 7.3.2 Positive versus negative source code testing 6.6.1 Using encapsulation to 7.4.1 Regression testing reduce coupling 7.4.2 Automated testing using JUnit 7.4.3 Recording a test 6.7.1 Responsibilities and 7.4.4 Fixtures coupling 7.7.1 A high-level walkthrough 6.11.1 Cohesion of methods 7.7.2 Checking state with a 6.11.2 Cohesion of classes walkthrough 6.11.3 Cohesion for 7.7.3 Verbal walkthroughs readability 6.11.4 Cohesion for reuse 7.8.1 Turning debugging information on or off 6.12.1 Refactoring and testing 6.12.2 An example of refactoring 6.13.1 Enumerated types 6.13.2 Further decoupling of the command interface 6.15.1 Class methods 6.15.2 The main method 8.1.1 The