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时间:2019-03-06
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1、实用文案原文Java2MicroEditionandtheWorldofJava1IntroductionThecomputerrevolutionofthe1970sincreasedthedemandforsophisticatedcomputersoftwaretotakeadvantageoftheever-increasingcapacityofcomputerstoprocessdata.TheCprogramminglanguagebecamethelinchpinthatenabledprogrammerstobuildsoftwarethatwasjustasr
2、obustasthecomputeritranon.Asthe1980sapproached,programmerswerewitnessinganotherspurtintheevolutionofprogramminglanguage.ComputertechnologyadvancedbeyondthecapabilitiesoftheCprogramminglanguage.Theproblemwasn’tnew.Itoccurredpreviouslyandcausedthedemiseofgenerationsofprogramminglanguages.Thepro
3、blemwasthatprogramswerebecomingtoocomplicatedtodesign,write,andmanagetokeepupwiththecapabilitiesofcomputers.ItwasaroundthistimethatadesignconceptbasedonSimula67andSmalltalk(fromthelate1960s)movedprogrammingtothenextevolutionarystep.Thiswastheperiodwhenobject-orientedprogramming(OOP),andwithit
4、anewprogramminglanguagecalledC++,tookprogrammersbystorm.In1979,BjarneStroustrupofBellLaboratoriesinNewJerseyenhancedtheCprogramminglanguagetoincludeobject-orientedfeatures.HecalledthelanguageC++.(The++istheincrementaloperatorintheCprogramminglanguage.)C++istrulyanenhancementoftheCprogrammingl
5、anguage,anditbeganasapreprocessorlanguagethatwastranslatedintoCsyntaxbeforetheprogramwasprocessedbythecompiler.Stroustrupbuiltontheconceptofaclass(takenfromSimula67andSmalltalk),fromwhichinstancesofobjectsarecreated.Aclasscontainsdatamembersandmemberfunctionsthatdefineanobject’sdataandfunctio
6、nality.Healsointroducedtheconceptofinheritance,whichenabledaclasstoinheritsomeoralldatamembersandmemberfunctionsfromoneormoreotherclasses—allofwhichcomplementstheconceptsofobject-orientedprogramming.By1988,ANSIofficialsstandardizedStroustrup’sC++specification.2EnterJava标准实用文案JustasC++wasbecom
7、ingthelanguageofchoiceforbuildingindustrial-strengthapplications,anothergrowthspurtintheevolutionofprogramminglanguagewasbudding,fertilizedbythelatestdisruptivetechnology—theWorldWideWeb.TheInternethadbeenawell-keptsecretfordecadesbeforetheNa
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