Programming Java 2 Micro Edition for Symbian OS: A developer's guide to MIDP 2.0

500 Pages·2004·5.71 MB·English

by  Martin de Jode

Programming Java 2
Micro Edition
on Symbian OS
A developer’s guide to MIDP 2.0
Martin de Jode
With
Jonathan Allin, Darren Holland, Alan Newman
and Colin Turfus
Reviewedby
Ivan Litovski, Roy Hayun, George Sewell, Simon Lewis,
Michael Aubert and Hana Bisada
ManagingEditor
Phil Northam
AssistantEditor
Freddie Gjertsen

Programming Java 2
Micro Edition
on Symbian OS

Programming Java 2
Micro Edition
on Symbian OS
A developer’s guide to MIDP 2.0
Martin de Jode
With
Jonathan Allin, Darren Holland, Alan Newman
and Colin Turfus
Reviewedby
Ivan Litovski, Roy Hayun, George Sewell, Simon Lewis,
Michael Aubert and Hana Bisada
ManagingEditor
Phil Northam
AssistantEditor
Freddie Gjertsen
Copyright2004SymbianLtd
PublishedbyJohnWiley&SonsLtd,TheAtrium,SouthernGate,Chichester,
WestSussexPO198SQ,England
Telephone[phone]
Email(forordersandcustomerserviceenquiries):[email protected]
VisitourHomePageonwww.wileyeurope.comorwww.wiley.com
AllRightsReserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem
ortransmittedinanyformorbyanymeans,electronic,mechanical,photocopying,recording,
scanningorotherwise,exceptunderthetermsoftheCopyright,DesignsandPatentsAct1988or
underthetermsofalicenceissuedbytheCopyrightLicensingAgencyLtd,90TottenhamCourt
Road,LondonW1T4LP,UK,withoutthepermissioninwritingofthePublisher,withthe
exceptionofanymaterialsuppliedspecificallyforthepurposeofbeingenteredandexecutedon
acomputersystemforexclusiveusebythepurchaseofthepublication.RequeststothePublisher
shouldbeaddressedtothePermissionsDepartment,JohnWiley&SonsLtd,TheAtrium,
SouthernGate,Chichester,WestSussexPO198SQ,England,oremailedto
[email protected],orfaxedto([phone].
Designationsusedbycompaniestodistinguishtheirproductsareoftenclaimedastrademarks.
Allbrandnamesandproductnamesusedinthisbookaretradenames,servicemarks,
trademarksorregisteredtrademarksoftheirrespectiveowners.ThePublisherisnotassociated
withanyproductorvendormentionedinthisbook.
Thispublicationisdesignedtoprovideaccurateandauthoritativeinformationinregardtothe
subjectmattercovered.ItissoldontheunderstandingthatthePublisherisnotengagedin
renderingprofessionalservices.Ifprofessionaladviceorotherexpertassistanceisrequired,the
servicesofacompetentprofessionalshouldbesought.
OtherWileyEditorialOffices
JohnWiley&SonsInc.,111RiverStreet,Hoboken,NJ07030,USA
Jossey-Bass,989MarketStreet,SanFrancisco,CA94103-1741,USA
Wiley-VCHVerlagGmbH,Boschstr.12,D-69469Weinheim,Germany
JohnWiley&SonsAustraliaLtd,33ParkRoad,Milton,Queensland4064,Australia
JohnWiley&Sons(Asia)PteLtd,2ClementiLoop#02-01,JinXingDistripark,Singapore129809
JohnWiley&SonsCanadaLtd,22WorcesterRoad,Etobicoke,Ontario,
CanadaM9W1L1
Wileyalsopublishesitsbooksinavarietyofelectronicformats.Somecontentthat
appearsinprintmaynotbeavailableinelectronicbooks.
LibraryofCongressCataloging-in-PublicationData
Jode,Martinde.
ProgrammingtheJava2microeditionforsymbianOS:adeveloper’sguidetoMIDP2.0/
MartindeJode...[etal.].
p.cm.
ISBN0-470-09223-8
1.Java(Computerprogramlanguage).2.Operatingsystems(Computers)3.Wireless
communicationsystems–Programming.
I.Title.
QA76.73.J38J6152004
005.13(cid:1)3–dc22
2004007312
BritishLibraryCataloguinginPublicationData
AcataloguerecordforthisbookisavailablefromtheBritishLibrary
ISBN0-470-09223-8
Typesetin10/12ptOptimabyLaserwordsPrivateLimited,Chennai,India
PrintedandboundinGreatBritainbyBiddlesLtd,King’sLynn
Thisbookisprintedonacid-freepaperresponsiblymanufacturedfromsustainable
forestryinwhichatleasttwotreesareplantedforeachoneusedforpaperproduction.
Contents
About This Book ix
Author Biographies xiii
Author’s Acknowledgements xvii
Symbian Press Acknowledgements xix
Foreword xxi
Innovation Through Openness xxiii
Section 1: J2ME and MIDP 1
1 Introduction to J2ME 3
1.1 ConfigurationsandProfiles 3
1.2 CLDCandMIDP 7
1.3 CDCandPersonalProfile 16
1.4 J2MEonSymbianOS 21
1.5 Summary 22
2 Getting Started 23
2.1 IntroductiontoMIDP 23
2.2 Helloworld,TurboEdition 46
2.3 IntroductiontoToolsforMIDP 54
2.4 InstallingandRunningaMIDlet 82
2.5 MIDPonSymbianOSPhones 89
2.6 Summary 89
vi CONTENTS
3 MIDP 2.0 and the JTWI 91
3.1 IntroductiontotheJTWI 91
3.2 TheCLDConSymbianOS 94
3.3 MIDP2.0 95
3.4 OptionalJ2MEAPIsintheJTWI 155
3.5 MIDP2.0andSymbianOSPhones 201
3.6 Summary 202
4 Java APIs for Bluetooth Wireless Technology 205
4.1 IntroductiontoBluetooth 205
4.2 IntroductiontotheBluetoothAPIs 206
4.3 ProgrammingtheBluetoothAPIs 208
4.4 L2CAPProtocol 224
4.5 Security 227
4.6 JavaBluetoothAPIandtheMIDP2.0SecurityModel 229
4.7 SampleCode 230
4.8 DevelopmentTools 241
4.9 JavaBluetoothAPIsandSymbianOS 244
4.10 Summary 244
5 MIDP 2.0 Case Studies 247
5.1 Introduction 247
5.2 TheExpenseApplication 248
5.3 TheDemoRacerGame 282
5.4 ThePicturePuzzle 294
Section 2: Writing Quality Code
for Smartphones 317
6 Making Java Code Portable 319
6.1 Introduction 319
6.2 DesignPatterns 320
6.3 PortabilityIssues 326
6.4 Summary 333
7 Writing Optimized Code 335
7.1 Introduction 335
7.2 WhatAreWeStartingWith? 336
7.3 Benchmarking 336
7.4 GeneralGuidelinesforOptimization 337
7.5 FeedbackandResponsiveness 338
7.6 ObjectCreation 338
7.7 MethodModifiersandInlining 340
7.8 Strings 343
CONTENTS vii
7.9 UsingContainers 348
7.10 HowNotToDoIt 349
7.11 CopyinganArray 351
7.12 ThoughtsonLooping 352
7.13 Graphics 358
7.14 LifeTimeCaseStudy 366
7.15 ArithmeticOperations 385
7.16 DesignPatterns 386
7.17 MemoryManagement 388
7.18 JITandDACCompilers 390
7.19 Obfuscators 391
7.20 Summary 392
Section 3: The Evolution of the Wireless
Java Market 393
8 The Market, the Opportunities
and Symbian’s Plans 395
8.1 Introduction 395
8.2 TheWirelessJavaMarket 395
8.3 MeetingMarketNeeds 400
8.4 ProvidingAdvancedServices 402
8.5 WhyJava? 406
8.6 SymbianandJava 409
8.7 JavaandDigitalRightsManagement 418
8.8 TheJavaVerifiedProgram 420
8.9 BeyondAdvancedConsumerServices 421
8.10 TrendsinTechnology 421
Appendix 1: CLDC Core Libraries 423
Appendix 2: MIDP Libraries 429
Appendix 3: Using the Wireless Toolkit Tools
at the Command Line 437
Appendix 4: Developer Resources and Bibliography 439
Appendix 5: Specifications of Symbian OS Phones 445
Index 461