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1、总分四五东北大学考试试卷（A卷）20122013学年第一学期课程名称：面向对象程序设计II!.SingleChoice(20POilItS2pointseach)1Fromwithinachildclass,itsparentclassisreferredtoviathekeyword?(C)（八）(his(B)Base(C)Super(D)parent2ClassesfromwhichofthefollowingpackagesareimplicitlyimportedintoeveryJavaprogram?(A)（八）java.Iang(B)java.util(C)java.awt(D)
2、java.io3InJava,thedefaultlayout布局managerforaJPaneIcomponentis(D)（八）BorderLayout(B)GridLayout(C)GridBagLayout(D)FIowLayout4TheStrategy策略designpattern模式islikelytobeusefulwhenimplementingwhichofthefollowing?(B)1Anapplicationthatoffersseveralalternate交替sorting排J至algorithms算法IlAsimpleclasstostoretheaddre
3、ssofanorganizationofwhichonlyoneinstancecanbeinstantiated（八）None(B)1only(C)IIonly(D)1andIl5IfthelengthofaparticulararrayisthevalueofLIMIT,whatistheindex指针ofthelastiteminthatarray?(D)（八）LIMIT(B)O(C)LIMIT/2(D)LIMIT-I8Ifafileopenedforreadingdocsnotexist,whichofthefollowingeventswilloccurinJava?(D)(A) A
4、NulipoinierExcepiionwillberaised.(B) Anewfilewillbecreated(C) Arun-timeerrorwilloccur(D) AFilcNotFoundExccptionwillberaised.9Adesignpatternistypicallyusedlo(D)(A) allowtheuseofobject-orientatedconceptsinalanguagethatisnotobject-oriented(B) reducethenumberofclassesinthedesignofaprogram(C) ensurethatc
5、odeexecutesatoptimalspeedduringntimc(D) describeapracticalsolutiontoaCOmmOndesignproblem10Whichofthefollowingstatementsis(are)teinJava?(B)IClassesthatcontainabstractmethodsmustbedeclaredabstract.IIClassesthatcontainprotectedmethodsmustbedeclaredabslct.（八）1andIl(B)Ionly(C)IIonly(D)NoneH. Fill in blan
6、ks. (10 points* 1 point each )6 Whichofthefollowingstatementsisnottrueofleclassjava.util.ArrayList?(B)(A) AninstanceofArrayListcangrowtoaccommodatenewitemswhenthecollectionisfull.(B) Onceanobjectisinsertedinto插入aninstance实例OfArrayList.itcanneverberemoved.(C) ItemsstoredbyaninstanceofArrayListcanbeac
7、cessedusingintegerindexes.(D) TheconstructoroftheAayListclass,whencalledwithnoarguments,causesanemptyArrayListtobeconstructed.7 ACOneCtiOn聚集IyPiCanymOdekarelationship?(C)（八）many-(o-many(B)zcro-(o-onc(C)one-to-many(D)one-to-one1 A单例designpatternCansuretomakeonlyoneobjectinthesoftwaresystem.2 InaUMLcl
8、assdiagramsrepresentationofaclass,(hetop.middle,andlowerrectangularcompartmentsrespectivelydescribethe类名称.属性and方法oftheclass.3 Inanobjectmodel,thedatathatanobjectisresponsibleformaintainingarcrepresented描写by届性.4 Thedatainainterfacemustbe共有的and抽象的.5 封装,继承and多态arcthebasecharactersofObject-OrientedProgr
9、amming.publicinterfaceMemberStrategypublicdoublecalcPrice(doublebooksPrice);publicclassPriceprivateMemberStrategystrategy;publicPrice(MemberStrategystrategy)this.strategy=strategy;)publicdoublequote(doublebooksPrice)returnthis.strategy.calcPrice(bksPrice);)publicclassNonnalMeniberStrategyimplementsM
10、emberStrategypublicdoublecalcPrice(doublebooksPrice)SySlem.oulprinlln(对于初级会员的没有折扣);returnbooksPrice;)publicclassVIPMemberStrategyimplementsMemberStrategypublicdoublecalcPrice(doublebooksPrice)SySIem.oulprinlln(对于中级会员的折扣为10%);returnbooksPrice*0.9;)publicclassSuperMemberStrategyimplementsMemberStrateg
11、ypublicdoublecalcPrice(doublebooksPrice)SySlem.oulprinln(对于高级会员的折扣为20%);returnbooksPrice*0.8;)(f)III. DesignasimpleBookSellerSystemwithstrategypattern.(25points)(a) Youdontcareallthefunctionsofthesystem.(b) TherearethreekindsofclientwhichincludeVIPMember(0.9*price).NorniaIMemberf1eprice),SuperMember
12、(0.8*price).Theyhavethedifferentdiscountwhentheybuybookfromthesystem.Youmustusestrategypatternwhenyoudesignthesystem.Firstly,youshouldgive(heUMLclassdiagramiththestrategypattern策略模式.(5points)Secondly,youshouldwritethecodeforeachclassyoudesignintheUML.(15points)Thirdly,youshouldwriteaclassnamedTestwh
13、ichincludeamain()method,wesupporttherearethreeclientsnamedTom(VIPMember),John(NormaIMember)andMike(SuperMember).Theclassyouwritecansellabooktothethreeclients.Wesupportthepriceofthebookis150.(5points)YourUMLishere.第3题答案：UML图(5points)IV. CreateanStudentinformationManagementapplicationasshownFig.1using
14、SwingGUI.Partoftheworkhasbeendone.Youshouldfinishthecode.(30points)Fig1StudentInfornwtionMHnagenIenlApplicationimportjava.aw.4;importjava.aw(.event.ActionListener;importjava.aw(.event.ActionEvent;importjava.io.FilcNotFondExccption;importjava.io.FileOutputStream;inpo11java.io.PriniWriter;importjavax.
15、swing.*;*Demonstratesthecomponent(glinkJTcxtFicId).Thisclassextendsclass(linkJPanel).*/publicclassStudentManagcnwntextendsJPaneIprivateJLabeIIabelName:privateJLabcIIabcINo;privateJLabeIIabeIGender:PriVaIeJlexiFieIdIextFieIdName;privateJTextFieIdIextFieIdNo;privateJTextFieldIextFieidGender:JButtonUddSIudentBUtton;JButtonsbmitButton;publicstaticvoidmain(Stringargs)JFrameframe=newJFramec学生信息增):frame.setContentPane(newStude
