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1、ParsingJavaAbstractionoftheDifferenceBetweenClassesandInterfacesInJavalanguage,abstractscale-upandwithsupportclassabstractiondefinitionoftwomechanisms.Becauseofthesetwokindsofmechanismofexistence,justgivesJavapowerfulobject-orientedskills.Abstractscale-u
2、pandwithbetweenclassesabstractiondefinitionforsupporthasgreatsimilarities,eveninterchangeable,somanydevelopersintolinenon-abstractclassdefinitionforabstractscale-upanditisbecomingmorecasualwithchoice.Infact,bothbetweenstillhastheverybigdifference,forthei
3、rchoiceevenreflectedinproblemdomainessenceofunderstanding,todesigntheintentionsoftheunderstandingcorrectlyandreasonable.Thispaperwillforthedifferenceanalysis,tryingtogiveadeveloperwithachoicebetweenthemarebased.UnderstandclassabstractionAbstractclassandi
4、nterfaceinJavalanguageisusedforabstractclasses(inthisarticlenon-abstractclassnotfromabstractscale-uptranslation,itrepresentsanabstractbody,andabstractscale-upforJavalanguageusedtodefineclassabstractioninoneway,pleasereadersdistinguish)defined,thenwhatare
5、theabstractclasses,useabstractclassesforusanygood?Inobject-orientedconcept,weknowallobjectsisthroughclasstodescribe,butinturnnotsuch.Notallclassesareusedtodescribeobject,ifaclassdoesnotcontainenoughinformationtoportrayaconcreteobject,thisclassisabstractc
6、lasses.Abstractclassesareoftenusedtocharacterizationofproblemfieldinouranalysis,designthattheabstractconcepts,istotheserieswilllookdifferent,butessentiallythesameexactconceptionofabstraction.Forexample:ifwecarryoutagraphicaleditingsoftwaredevelopment,wil
7、lfindproblemdomainexistsround,trianglesosomespecificconcept,theyaredifferent,buttheyallbelongtoshapesuchaconcept,shapethisconceptinproblemdomainisnotexist,itisanabstractconcept.Preciselybecausetheabstractconceptsinproblemfieldnocorrespondingspecificconce
8、pt,sotocharacterizationabstractconceptsnon-abstractclasscannotbeinstantiated.Inanobject-orientedfield,mainlyusedforclassabstractiontypeshidden.Wecanconstructafixedagroupofbehaviorofabstractdescription,butthisgroupofbehavio
