Java语言程序设计10E LiangPPT习题案例10slide.ppt

Java语言程序设计10E LiangPPT习题案例10slide.ppt

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时间:2020-03-26

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1、1Chapter10ThinkinginObjects2MotivationsYouseetheadvantagesofobject-orientedprogrammingfromtheprecedingchapter.Thischapterwilldemonstratehowtosolveproblemsusingtheobject-orientedparadigm.3ObjectivesToapplyclassabstractiontodevelopsoftware(§10.2).Toexploreth

2、edifferencesbetweentheproceduralparadigmandobject-orientedparadigm(§10.3).Todiscovertherelationshipsbetweenclasses(§10.4).Todesignprogramsusingtheobject-orientedparadigm(§§10.5–10.6).Tocreateobjectsforprimitivevaluesusingthewrapperclasses(Byte,Short,Intege

3、r,Long,Float,Double,Character,andBoolean)(§10.7).Tosimplifyprogrammingusingautomaticconversionbetweenprimitivetypesandwrapperclasstypes(§10.8).TousetheBigIntegerandBigDecimalclassesforcomputingverylargenumberswitharbitraryprecisions(§10.9).TousetheStringcl

4、asstoprocessimmutablestrings(§10.10).TousetheStringBuilderandStringBufferclassestoprocessmutablestrings(§10.11).4ClassAbstractionandEncapsulationClassabstractionmeanstoseparateclassimplementationfromtheuseoftheclass.Thecreatoroftheclassprovidesadescription

5、oftheclassandlettheuserknowhowtheclasscanbeused.Theuseroftheclassdoesnotneedtoknowhowtheclassisimplemented.Thedetailofimplementationisencapsulatedandhiddenfromtheuser.5DesigningtheLoanClassTestLoanClassRunLoan6Object-OrientedThinkingChapters1-8introducedfu

6、ndamentalprogrammingtechniquesforproblemsolvingusingloops,methods,andarrays.Thestudiesofthesetechniqueslayasolidfoundationforobject-orientedprogramming.Classesprovidemoreflexibilityandmodularityforbuildingreusablesoftware.Thissectionimprovesthesolutionfora

7、problemintroducedinChapter3usingtheobject-orientedapproach.Fromtheimprovements,youwillgaintheinsightonthedifferencesbetweentheproceduralprogrammingandobject-orientedprogrammingandseethebenefitsofdevelopingreusablecodeusingobjectsandclasses.7TheBMIClassUseB

8、MIClassRunBMI8ObjectCompositionCompositionisactuallyaspecialcaseoftheaggregationrelationship.Aggregationmodelshas-arelationshipsandrepresentsanownershiprelationshipbetweentwoobjects.Theownerobjectiscalledanag

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