Sams teach yourself programming with java in 24 hours 4th edition oct 2005 ISBN 0672328445
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SAMSTeachYourselfProgrammingwith
Java™in24Hours,FOURTHEDITION
ByRogersCadenhead
...............................................
Publisher:Sams
PubDate:September30,2005
ISBN:0-672-32844-5
Pages:576
TableofContents|Index
IfyouhavebeenwantingtolearnJava,checkoutthenewlyrevisedfourtheditionof
thebest-sellerSamsTeachYourselfProgrammingwithJavain24Hours.Thisstepby-steptutorialwillteachyouhowtocreatesimpleJavaprogramsandapplets.
Comprisedof24one-hourlessons,thisneweditionfocusesonkeyprogramming
conceptsandessentialJavabasics,hasbeenimprovedbydozensofreadercomments,
andisreorganizedtobettercoverthelatestdevelopmentsinJava.Thebook's
coverageofcoreJavaprogrammingtopicshasalsobeenexpanded.Agreatstarting
pointforlearningJava,thisbookisalsoagreatprimertoreadingsamsTeachYourself
Javain21Days.
SAMSTeachYourselfProgrammingwith
Java™in24Hours,FOURTHEDITION
ByRogersCadenhead
...............................................
Publisher:Sams
PubDate:September30,2005
ISBN:0-672-32844-5
Pages:576
TableofContents|Index
Copyright
AbouttheAuthor
Acknowledgments
ReaderAcknowledgements
WeWanttoHearfromYou!
ReaderServices
Introduction
PartI.GettingStarted
Hour1.BecomingaProgrammer
ChoosingaLanguage
TellingtheComputerWhattoDo
HowProgramsWork
HowProgramsDon'tWork
NextStop:Java
Workshop:InstallingaJavaDevelopmentTool
Summary
Q&A
Quiz
Activities
Hour2.WritingYourFirstProgram
WhatYouNeedtoWritePrograms
CreatingtheSalutonProgram
StoringInformationinaVariable
SavingtheFinishedProduct
CompilingtheProgramintoaClassFile
FixingErrors
Workshop:RunningaJavaProgram
Summary
Q&A
Quiz
Activities
Hour3.VacationinginJava
FirstStop:SunMicrosystems
GoingtoSchoolwithJava
LunchinJavaWorld
WatchingtheSkiesatNASA
GettingDowntoBusiness
StoppingbyGamelantoAskDirections
Workshop:VenturingintoAnotherWorld
Summary
Q&A
Quiz
Activities
Hour4.UnderstandingHowJavaProgramsWork
CreatinganApplication
SendingArgumentstoApplications
AppletBasics
SendingParameterstoApplets
Workshop:ViewingtheCodeUsedtoRunApplets
Summary
Q&A
Quiz
Activities
PartII.LearningtheBasicsofProgramming
Hour5.StoringandChangingInformationinaProgram
StatementsandExpressions
AssigningVariableTypes
NamingYourVariables
StoringInformationinVariables
Workshop:UsingExpressions
AllaboutOperators
Summary
Q&A
Quiz
Activities
Hour6.UsingStringstoCommunicate
StoringTextinStrings
DisplayingStringsinPrograms
UsingSpecialCharactersinStrings
PastingStringsTogether
UsingOtherVariableswithStrings
AdvancedStringHandling
Workshop:PresentingCredits
Summary
Q&A
Quiz
Activities
Hour7.UsingConditionalTeststoMakeDecisions
TestingaCondition
ifStatements
if-elseStatements
switchStatements
TheConditionalOperator
Workshop:WatchingtheClock
Summary
Q&A
Quiz
Activities
Hour8.RepeatinganActionwithLoops
forLoops
whileLoops
do-whileLoops
ExitingaLoop
NamingaLoop
Workshop:TeachingYourComputeraLesson
Summary
Q&A
Quiz
Activities
PartIII.WORKINGWITHINFORMATIONINNEWWAYS
Hour9.StoringInformationwithArrays
CreatingArrays
UsingArrays
MultidimensionalArrays
SortinganArray
Workshop:ArrayofPrizes,Indeed
Summary
Q&A
Quiz
Activities
Hour10.CreatingYourFirstObject
HowObject-OrientedProgrammingWorks
ObjectsinAction
WhatObjectsAre
UnderstandingInheritance
BuildinganInheritanceHierarchy
ConvertingObjectsandSimpleVariables
Workshop:CreatinganObject
Summary
Q&A
Quiz
Activities
Hour11.DescribingWhatYourObjectIsLike
CreatingVariables
CreatingClassVariables
CreatingBehaviorwithMethods
PuttingOneClassinsideAnother
UsingthethisKeyword
Workshop:UsingClassMethodsandVariables
Summary
Q&A
Quiz
Activities
Hour12.MakingtheMostofExistingObjects
ThePowerofInheritance
EstablishingInheritance
WorkingwithExistingObjects
StoringObjectsoftheSameClassinVectors
Workshop:CreatingaSubclass
Summary
Q&A
Quiz
Activities
PartIV.ProgrammingaGraphicalUserInterface
Hour13.BuildingaSimpleUserInterface
SwingandtheAbstractWindowingToolkit
UsingComponents
Workshop:CreatingYourOwnComponent
Summary
Q&A
Quiz
Activities
Hour14.LayingOutaUserInterface
UsingLayoutManagers
Workshop:LayingOutanApplication
Summary
Q&A
Quiz
Activities
Hour15.RespondingtoUserInput
GettingYourProgramstoListen
SettingUpComponentstoBeHeard
HandlingUserEvents
Workshop:ALittleLottoMadness
Summary
Q&A
Quiz
Activities
Hour16.BuildingaComplexUserInterface
ScrollPanes
Sliders
ChangeListeners
Menus
Workshop:UsingImageIconsandToolbars
Summary
Q&A
Quiz
Activities
PartV.CreatingMultimediaPrograms
Hour17.CreatingInteractiveWebPrograms
StandardAppletMethods
PuttinganAppletonaWebPage
ASampleApplet
TheJavaPlug-in
SendingParametersfromaWebPage
ReceivingParametersintheApplet
Workshop:HandlingParametersinanApplet
JavaWebStart
UsingJavaWebStart
Summary
Q&A
Quiz
Activities
Hour18.HandlingErrorsinaProgram
Exceptions
Assertions
Workshop:ThrowingandCatchingExceptions
Summary
Q&A
Quiz
Activities
Hour19.CreatingaThreadedProgram
Threads
WorkingwithThreads
Startingwithinit()
CatchingErrorsasYouSetUpURLs
HandlingScreenUpdatesinthepaint()Method
StartingtheThread
HandlingMouseClicks
Workshop:RevolvingLinks
Summary
Q&A
Quiz
Activities
Hour20.ReadingandWritingFiles
Streams
WritingDatatoaStream
ReadingandWritingConfigurationProperties
Workshop:WritingBytestoanMP3File
Summary
Q&A
Quiz
Activities
PartVI.CreatingMultimediaPrograms
Hour21.ReadingandWritingXMLData
CreatinganXMLFile
ReadinganXMLFile
Workshop:ReadingRSSSyndicationFeeds
Summary
Q&A
Quiz
Activities
Hour22.UsingFontsandColor
UsingtheFontClass
UsingtheColorClass
OtherWaystoChooseColors
Workshop:DisplayingaDangerMessage
Summary
Q&A
Quiz
Activities
Hour23.WorkingwithGraphics
UsingGraphics
DrawingLinesandShapes
Workshop:BakingaPieGraph
Summary
Q&A
Quiz
Activities
Hour24.CreatingAnimation
AnimatingaSequenceofImages
SendingParameterstotheApplet
Workshop:FollowtheBouncingBall
Summary
Q&A
Quiz
Activities
PartVII.Bonus…
Hour25.CreatingWebServiceswithXML-RPC
WorkingwithApacheXML-RPC
CreatinganXML-RPCHandler
CreatinganXML-RPCServer
CreatinganXML-RPCClient
Workshop:EnhancingtheLottoMadnessApplication
Summary
Q&A
Quiz
Activities
PartVIII.Appendixes
AppendixA.UsingtheJavaDevelopmentKit
ChoosingaJavaDevelopmentTool
ConfiguringtheJavaDevelopmentKit
UsingaTextEditor
CreatingaSampleProgram
SettingUptheCLASSPATHVariable
AppendixB.ProgrammingwiththeJavaDevelopmentKit
AnOverviewoftheJDK
ThejavaInterpreter
ThejavacCompiler
TheappletviewerBrowser
ThejavadocDocumentationTool
ThejarJavaFileArchivalTool
ThejdbDebugger
UsingSystemProperties
Summary
Q&A
AppendixC.UsingtheNetBeansIntegratedDevelopmentEnvironment
ChoosingaJavaDevelopmentTool
CreatingaSampleProgram
AppendixD.WheretoGofromHere:JavaResources
OtherBookstoConsider
Sun'sOfficialJavaSite
OtherJavaWebsites
JavaNewsgroups
InternetRelayChat
JobOpportunities
AppendixE.ThisBook'sWebsite
SunMicrosystems,Inc.BinaryCodeLicenseAgreement
JAVA™DEVELOPMENTTOOLSJAXP.JARANDPARSER.JARARCHIVEFILESFROMJAVA
APIFORXMLPARSING,VERSION1.0SUPPLEMENTALLICENSETERMS
JAVAHELP™VERSION2.0SUPPLEMENTALLICENSETERMS
JAVA™DEVELOPMENTTOOLSJAVACCOMPILERSUPPLEMENTALLICENSETERMS
JAVA™INTERFACECLASSESJ2EE™DEPLOYMENTSPECIFICATIONINTERFACECLASSES
1.1SUPPLEMENTALLICENSETERMS
JAVA2,ENTERPRISEEDITION(J2EE™)MANAGEMENT,VERSION1.0JAVA™INTERFACE
CLASSESSUPPLEMENTALLICENSETERMS
JAVA™INTERFACECLASSESENTERPRISEJAVABEANS™,VERSION2.0,INTERFACE
CLASSESSUPPLEMENTALLICENSETERMS
JAVA™OPTIONALPACKAGEJMX™,VERSION1.2SUPPLEMENTALLICENSETERMS
J2EEeditor.jarSUPPLEMENTALLICENSETERMS
resolver-1_1_nb.jarBasedonSun'sXMLResolver1.0SoftwareLicenseAgreement
What'sontheCD-ROM
WindowsInstallationInstructions
UNIXandUNIX-likeInstallationInstructions
Index
Copyright
Copyright©2006bySamsPublishing
Allrightsreserved.Nopartofthisbookshallbereproduced,storedinaretrieval
system,ortransmittedbyanymeans,electronic,mechanical,photocopying,
recording,orotherwise,withoutwrittenpermissionfromthepublisher.No
patentliabilityisassumedwithrespecttotheuseoftheinformationcontained
herein.Althougheveryprecautionhasbeentakeninthepreparationofthisbook,
thepublisherandauthorassumenoresponsibilityforerrorsoromissions.Noris
anyliabilityassumedfordamagesresultingfromtheuseoftheinformation
containedherein.
LibraryofCongressCatalogCardNumber:2005928293
PrintedintheUnitedStatesofAmerica
FirstPrinting:October2005
080706054321
Trademarks
Alltermsmentionedinthisbookthatareknowntobetrademarksorservice
markshavebeenappropriatelycapitalized.SamsPublishingcannotattesttothe
accuracyofthisinformation.Useofaterminthisbookshouldnotberegarded
asaffectingthevalidityofanytrademarkorservicemark.
WarningandDisclaimer
Everyefforthasbeenmadetomakethisbookascompleteandasaccurateas
possible,butnowarrantyorfitnessisimplied.Theinformationprovidedisonan
"asis"basis.Theauthorandthepublishershallhaveneitherliabilitynor
responsibilitytoanypersonorentitywithrespecttoanylossordamagesarising
fromtheinformationcontainedinthisbookorfromtheuseoftheCDor
programsaccompanyingit.
BulkSales
SamsPublishingoffersexcellentdiscountsonthisbookwhenorderedin
quantityforbulkpurchasesorspecialsales.Formoreinformation,please
contact
U.S.CorporateandGovernmentSales
1-800-382-3419
ForsalesoutsideoftheU.S.,pleasecontact
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Credits
SeniorEditor
ScottMeyers
ManagingEditor
CharlotteClapp
ProjectEditor
AndyBeaster
Indexer
ChrisBarrick
Proofreader
PaulaLowell
TechnicalEditor
JohnPurdum
PublishingCoordinator
VanessaEvans
MultimediaDeveloper
DanScherf
BookDesigner
GaryAdair
PageLayout
ToiDavis
NonieRatcliff
Dedication
TomywifeM.C.Moeweforthefirst18yearsofhappilyeverafter.Maythis
booksellconsiderablybetterthanthefirstbookIdedicatedtoyoubackin1996,
SamsTeachYourselfSunSoftJavaWorkshopin21Days.I'mnotimplyingthat
yourdedicationhadanythingtodowiththesalesperformanceofthattitle,butif
thisbooksuffersasimilarfate,Imighthavesecondthoughtsaboutnot
dedicatingittomymother.ButIdigress.SomeonewaslookingoutformewhenI
stumbleddrunkenlyintotheloveofmylifeatathree-kegtogabacchanaliaatthe
UniversityofTexas-Arlingtonin1987.Iwillalwayscherishthefirstmoment
whenyoustaredatmethroughthickbeergogglesanddecidedIwasn'tasweird
lookingasyouoriginallysuspected.Rogers
AbouttheAuthor
RogersCadenheadisawriter,webapplicationdeveloper,andthemost
valuableplayerinanNBAplayoffgame[*].Hehaswritten20booksonInternetrelatedtopics,includingSamsTeachYourselfJava2in21Days,FourthEdition,
SamsTeachYourselfMicrosoftFrontPage2003in24Hours,andRadio
UserLandKickStart.Hemaintainsthisbook'sofficialwebsiteat
.
[*]CadenheadattendedGame6ofthe1988NBAWesternConferenceFinalsatReunionArenain
Dallas.TheDallasMavericksbeattheLosAngelesLakers105-103toforceaseventhgameofthe
series.CBSSportsgavehalftheMVPawardtoMaverickspowerforwardMarkAguirrefor23
pointsand13rebounds,andhalftotheselloutcrowdof17,007forshoutingawholelotinloud
voicesandmakingenthusiastichandgestures.
Cadenhead'sstatisticsinthegame:
PLAYERMINFGM-FGAFTM-FTAOFF-DEF-TOTASTPFSTTOPTSBEE
TOBATHROOM
=================================================
=================
CADENHEAD00-00-0000000000
3
Acknowledgments
TothefolksatSamsespeciallyMarkTaber,ScottMeyers,JohnPurdum,and
AndyBeaster.Noauthorcanproduceabooklikethisonhisown,regardlessof
whatmyagenttoldSamsduringcontractnegotiations.Theirexcellentworkwill
givemeplentytotakecreditforlateron.
ToLauraLewinattheStudioBagency,whoworkedhardonmybehalfin
regardtothistitleandmanyothers.
Tomywife,Mary,andmysons,Max,Eli,andSam.Althoughourfamilyhasnot
fulfilledmydreamofbecomingahigh-wiretrapezeteamliketheFlying
Wallendas,I'mtheworld'sproudesthusbandinanon-acrobaticfamily.
ReaderAcknowledgements
I'dalsoliketothankreaderswhohavesenthelpfulcommentsaboutcorrections,
typos,andsuggestedimprovementstothebook.ThelistincludesBrian
Converse,PhilipB.CoppIII,WallaceEdwards,M.B.Ellis,KevinFoad,Adam
Grigsby,MarkHardy,KellyHoke,DonovanKelorii,RusselLoski,Jason
Saredy,MikeSavage,PeterSchrier,GeneWines,JimYates,andotherswho
shallremainnamelessbecausetheyhelpedmeimprovethebookbeforeIstarted
thislist.
WeWanttoHearfromYou!
Asthereaderofthisbook,youareourmostimportantcriticandcommentator.
Wevalueyouropinionandwanttoknowwhatwe'redoingright,whatwecould
dobetter,whatareasyou'dliketoseeuspublishin,andanyotherwordsof
wisdomyou'rewillingtopassourway.
Youcanemailorwritemedirectlytoletmeknowwhatyoudidordidn'tlike
aboutthisbookaswellaswhatwecandotomakeourbooksstronger.
PleasenotethatIcannothelpyouwithtechnicalproblemsrelatedtothetopicof
thisbook,andthatduetothehighvolumeofmailIreceive,Imightnotbeable
toreplytoeverymessage.
Whenyouwrite,pleasebesuretoincludethisbook'stitleandauthoraswellas
yournameandphoneoremailaddress.Iwillcarefullyreviewyourcomments
andsharethemwiththeauthorandeditorswhoworkedonthebook.
Email:
Mail:
MarkTaber
AssociatePublisher
SamsPublishing
201West103rdStreet
Indianapolis,IN46290USA
ReaderServices
FormoreinformationaboutthisbookorothersfromSamsPublishing,visitour
websiteatwww.samspublishing.com.TypetheISBN(excludinghyphens)orthe
titleofthebookintheSearchboxtofindthebookyou'relookingfor.
Introduction
Astheauthorofcomputerbooks,Ispendalotoftimelurkinginthecomputer
sectionofbookstores,observingthebehaviorofshoppersbrowsingthroughthe
booksasiftheywerehominidjawbonesandIwasapaleontologist.
Becauseofmyresearch,I'velearnedthatifyouhavepickedupthisbookand
turnedtotheintroduction,Ionlyhaveabout12moresecondsbeforeyouputit
downandheadtothecoffeebarforadoubletalllattedecafskimwithtwoshots
ofvanillaholdthewhip.
SoI'llkeepthisbrief:ComputerprogrammingwithJavaisaloteasierthanit
looks.I'mnotsupposedtotellyouthat,becausetherearethousandsof
programmerswhohaveusedtheirJavaskillstogethigh-payingjobsinsoftware
development,webapplicationprogramming,ande-commerce.Thelastthing
anyofthemwantisfortheirbossestoknowthatanyonewhohaspersistence
andalittlefreetimecanlearnthislanguage,themostpopularprogramming
languageinusetoday.Byworkingyourwaythrougheachoftheone-hour
tutorialsinSamsTeachYourselfProgrammingwithJavain24Hours,Fourth
Edition,you'llbeabletolearnJavaprogrammingquickly.
Anyonecanlearnhowtowritecomputerprogramseveniftheycan'tprograma
VCR.Javaisoneofthebestprogramminglanguagestolearnbecauseit'sa
useful,powerful,moderntechnologythat'sembracedbythousandsof
programmersaroundtheworld.
Thisbookisaimedatnon-programmers,newprogrammerswhohatedlearning
thesubject,andexperiencedprogrammerswhowanttoquicklygetuptospeed
withJava.ItusesJava2version5,thecurrentversionofthelanguage.
JavaistheTigerWoodsofprogramminglanguagesbecauseofthethingsit
makespossible.Youcancreateprogramsthatfeatureagraphicaluserinterface,
designsoftwarethatmakesthemostoftheInternet,readXMLdata,add
animationtoWorldWideWebpages,andmore.
ThisbookteachesJavaprogrammingfromthegroundup.Itintroducesthe
conceptsinEnglishinsteadofjargon,withplentyofstep-by-stepexamplesof
workingprogramsyouwillcreate.Spend24hourswiththisbookandyou'llbe
writingyourownJavaprograms,confidentinyourabilitytousethelanguage
andlearnmoreaboutit.Youalsowillhaveskillsthatarebecomingincreasingly
importantsuchasnetworkcomputing,graphicaluserinterfacedesign,and
object-orientedprogramming.
Thesetermsmightnotmeanmuchtoyounow.Infact,they'reprobablythekind
ofthingthatmakesprogrammingseemlikeasecretritualforaweirdgroupof
humanswhohavealanguageoftheirown.However,ifyoucanuseacomputer
tocreateanattractiveresume,balanceyourcheckbook,orcreateahomepage,
youcanwritecomputerprogramsbyreadingSamsTeachYourselfProgramming
withJavain24Hours,FourthEdition.
BytheWay
Atthispoint,ifyouwouldratherhavecoffeethanJava,pleasereshelvethis
bookwiththefrontcoverfacingoutwardonanendcapwithaccesstoalotof
thestore'sfoottraffic.
PartI:GettingStarted
HOUR1BecomingaProgrammer
HOUR2WritingYourFirstProgram
HOUR3VacationinginJava
HOUR4UnderstandingHowJavaProgramsWork
Hour1.BecomingaProgrammer
Computerprogrammingisinsanelydifficult.Itrequiresafour-yeardegreein
computerscience,thousandsofdollarsincomputerhardwareandsoftware,a
keenanalyticalintellect,thepatienceofJob,andastronglikingforcaffeinated
drinks.Ifyou'reaprogrammingnovice,thisisprobablywhatyou'veheardabout
computerprogramming.Asidefromthepartaboutcaffeine,alloftherumorsare
greatlyexaggerated.
Programmingiseasierthanmostpeoplethink,althoughthereareseveralreasons
whyyoumightbelieveotherwise:
Computerprogrammershavebeentellingpeopleforyearsthat
programmingishard.Thisbeliefmakesiteasierforustofindhigh-paying
jobsandgivesusmoreleewaytogoofoffduringbusinesshours.
Computerprogrammingmanualsareoftenwritteninalanguagethatonlya
Scrabbleplayercouldappreciate.StrangeacronymslikeOOP,RAD,COM,
andMUMPSareusedfrequentlyalongwithnewlyinventedjargonlike
instantiation,bytecode,andmakefile.
Manycomputerprogramminglanguageshavebeenavailableonlywith
softwarepackagescosting$200ormore,whichisalotofcabbage.
BecauseofthegrowthoftheInternetandotherfactors,thisisagreattimeto
learnprogramming.Usefulprogrammingtoolsarebeingmadeavailableatlow
cost(ornocost),oftenasdownloadsfromWorldWideWebsites.Thousandsof
programmersaredistributingtheirworkunder"opensource"licensessopeople
canexaminehowtheprogramswerewritten,correcterrors,andaddtheirown
improvements.
Thegoalofthisbookistoteachprogrammingtothepersonwhohasnevertried
toprogrambefore,orthepersonwhotriedprogrammingbuthateditwithan
intensepassion.TheEnglishlanguagewillbeusedasmuchaspossibleinstead
ofjargonandobscureacronyms,andallnewprogrammingtermswillbe
thoroughlyexplainedastheyareintroduced.
IfI'vesucceeded,youwillfinishSamsTeachYourselfProgrammingwithJavain
24Hourswithenoughprogrammingskilltobeadangertoyourselfandothers.
You'llbeabletowriteprograms,diveintootherprogrammingbookswithmore
confidence,andlearnprogramminglanguagesmoreeasily.Youalsowillhave
developedskillswithJava,themostinnovativeprogramminglanguagetobe
introducedinyears.
Thefirsthourofthisbookprovidessomeintroductorymaterialabout
programmingandgivesyouinstructionsonhowtosetupyourcomputersoyou
canwriteJavaprograms.Thefollowingtopicswillbecovered:
Choosingwhichprogramminglanguagetolearnfirst
LearningwhatJavais
Usingprogramstobossyourcomputeraround
Discoveringhowprogramswork
Fixingprogramerrors(calledbugs)
AcquiringaJavadevelopmenttool
Gettingreadytowriteprograms
ChoosingaLanguage
Asyoumighthavesurmisedatthispoint,computerprogrammingisnotashard
asit'scrackeduptobe.Ifyou'recomfortableenoughwithacomputertoprepare
anice-lookingresume,balanceacheckbookwithsoftwaresuchasIntuit
Quicken,orcreateyourownhomepageontheWeb,youcanwriteprograms.
Thekeytolearninghowtoprogramistostartwiththerightlanguage.The
programminglanguageyouchooseoftendependsonthetasksyouwantthe
computertoaccomplish.Eachlanguagehasthingsitiswell-suitedforaswellas
thingsthataredifficultperhapsimpossibletodowiththelanguage.Forexample,
manypeopleusesomeformoftheBASIClanguagewhentheyarelearninghow
toprogrambecauseBASICwascreatedwithbeginnersinmind.
BytheWay
TheBASIClanguagewasinventedinthe1960stobeeasyforstudentsand
beginnerstolearn(theBinBASICstandsforBeginner's).Thedownsideto
usingsomeformofBASICisthatit'seasytofallintosloppyprogramming
habitswiththelanguage.Thosehabitscanmakeitmuchmoredifficulttowrite
complexprogramsandimprovethemlater.
MicrosoftVisualBasiccombinestheeaseofBASICwithsomepowerful
featurestoaidinthedesignofWindowssoftware.(VBScript,whichisshortfor
VisualBasicScript,offersthesimplicityofBASICforsmallprogramsthatrun
inconjunctionwithWorldWideWebpages.)VisualBasichasbeenusedtowrite
thousandsofsophisticatedprogramsforcommercial,business,andpersonaluse.
However,VisualBasicprogramscanbeslowerthanWindowsprogramswritten
inotherlanguagessuchasBorlandC++.Thisdifferenceisespeciallynoticeable
inprogramsthatusealotofgraphicsgames,screensavers,andthelike.
ThisbookcoverstheJavaprogramminglanguage,whichwasdevelopedbySun
Microsystems.ThoughJavaismoredifficulttolearnthanalanguagesuchas
VisualBasic,itisagoodstartingplaceforseveralreasons.Oneadvantageof
learningJavaisthatyoucanuseitontheWorldWideWeb.Ifyou'rean
experiencedwebsurfer,youhaveseennumerousJavaprogramsinaction.They
canbeusedtocreatechatrooms,playgames,andhelpinotherinteractive
efforts.
AnotherimportantadvantageisthatJavarequiresanorganizedapproachfor
gettingprogramstowork.Thelanguageisveryparticularabouttheway
programsmustbewritten,anditbalksifprogrammersdonotfollowallofits
rules.
WhenyoustartwritingJavaprograms,youmightnotseethelanguage'schoosy
behaviorasanadvantage.You'llwriteaprogramandhaveseveralerrorstofix
beforetheprogramisfinished.Someofyourfixesmightnotbecorrect,andthey
