09-10第一學(xué)期-java高級編程答案

2009年～2010年第一學(xué)期《Java高級編程》期末試題答案〖A卷一、單項選擇題（每題2分，共20分1.A2.B3.C4.A5.B6.A7.B8.C9.B二、判斷題（每題2分，共20分，認為正確的在標題前標注“∨”，錯誤的標注“X）1.X2.X3.X4.∨5.∨6.X7.∨8.X9.X三、程序填空題（共60分）1.ClassGradeBookrepresentsagradebookusedbyaprofessortostoreandyzeasetofstudentgrades.Please plishthedefineofmethodsaccordingtothe//findminimumgradepublicintgetMinimum(){intlowGrade=grades[0];for(intgrade:grades){if(grade<lowGrade)lowGrade=grade;}return}//findumgradepublicintgetum(){inthighGrade=grades[0];for(intgrade:grades){if(grade>highGrade)highGrade=}return}//determineaveragegradefortestpublicdoublegetAverage(){inttotal=for(intgrade:grades)total+=grade;return(double)total/}}//endclassClassTime2containsfiveoverloadedconstructorsthatprovideconvenientwaystoinitializeobjectsofthenewclassTime2.Please plishthedefinitionofconstructorsaccordingtothe//Time2classdeclarationwithoverloadedconstructors.publicclassTime2{privateinthour;//0-23privateintminute;//0-59privateintsecond;//0-//Time2no-argumentconstructor:initializeseachinstancevariabletozero;publicTime2(){}//Time2constructor:hourd,minuteandseconddefaultedto0publicTime2(inth){}//Time2constructor:hourandminuted,seconddefaultedto0publicTime2(inth,intm){}//Time2constructor:hour,minuteandseconddpublicTime2(inth,intm,ints){}//Time2constructor:anotherTime2 publicTime2(Time2time{this(time.getHour(),time.getMinute(),}}//endclassTheUMLclassdiagramshowsthehierarchyusedinouraccountspayableapplication.ThehierarchybeginswithinterfacePayable.ThediagramindicatesthatclassesandEmployeeeachrealizeinterfacePayable.Notethat,classEmployeeappearsinitalics,indicatingthatitisan class.Please plishtheprogramaccordingtothecomments.publicclassimplements{privateStringpartNumber;//thepartprivateStringpartDescription;//adescriptionofthepartprivateintty; //thetyofthepartorderedprivatedoublepricePerItem; //thepriceperitem//MethodgetPaymentAmountmultipliesthevaluesoftyandpricePerItemtocalculatethetotalpaymentrequiredtopaythe.publicdouble{returngetty()*}}//endclass classEmployeeimplements{privateStringName;privateStringlastName;privateString//three-argumentpublicEmployee(String,Stringlast,Stringssn{}//setpublicvoidsetName(String{tThis.Name=}//returnpublicStringget{return}//setlastpublicvoidsetLastName(Stringlast{this.lastName=}//returnlastpublicString{return}//setsocialsecuritypublicvoidsetSocialSecurityNumber(Stringssn{this.socialSecurityNumber=}//returnsocialsecuritynumber{return}}// classPleaseusealgorithmsorttoordertheelementsofaListinascending//Usingalgorithmsort.importjava.util.List;importjava.util.Arrays;publicclassSortAlgorithmn{privatestaticfinalStringsuits[]{"Hearts","Diamonds","Clubs","Spades"http://sortandprintarraysuitselementsinascendingorderpublicvoidsort_prinements(){List<String>list=Arrays.asList(suits);System.out.p