软件学院_面向对象程序设计_2008-2009(2)期末B卷

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1、一、选择题（30分）说明：每题2分，只有1个正确答案，请将正确答案填写在下面表格中。题号123456789101112131415答案1．WhichofthefollowingstatementsiscorrectaboutJavapackages?A.Apackagemaycontainunlimitednumberofnestedsub-packages.B.ApackageisacollectionofrelatedJavasourceprogram.C.Usingtheimportstatementcanincludeallt

2、heclassesintothecurrentprogramfromaspecifiedpackageanditssub-packages.D.Ifthereisnopackagestatementused,thecurrentclasswillnotbeinanypackage.2．WhichoneisthewrongstatementaboutJavaconstructors?A.Thenameofaconstructormustbethesameasitsclass’sname.B.Aconstructorhasnoreturn

3、valueandcannotbemodifiedbyvoid.C.Aconstructoroftheparentclasscannotbeinheritedbyitssub-classes.D.Allconstructorsmustbemodifiedbypublic.3．Givingthecodebellow:classTest{privateintm;publicstaticvoidfun(){/*somecode...*/}}Howtomakethemembervariablemaccessibleformethodfun()?

4、A.change"privateintm"to"protectedintm"B.change"privateintm"to"publicintm"C.change"privateintm"to"staticintm"D.change"privateintm"to"intm"第12页共12页1．Whichofthefollowingfunctionsisanoverloadingfunctionof"publicvoidexample(){...}"?A.publicvoidexample(){...}B.publicintexampl

5、e(){...}C.publicvoidexample2(){...}D.publicintexample(intm,floatf){...}2．InJava,aclassmayhavemanydifferentmethodswiththesamename.Thenumber,type,sequencesofargumentsinthesemethodsaredifferent,andthereturnvaluecanbedifferentaswell.Whatdowecallthisfeatureintermsofobject-or

6、ientedprogramming?A.HidingB.OverridingC.OverloadingD.ThisfeatureisnotsupportedinJava3．Howtoexecutethefollowingprogram?publicclassTest{publicstaticvoidmain(Stringargs[]){System.out.println(args[0]);}}A.javaTest.classB.javaTestC.javaTestaStringD.javacTest4．Ifacontainerhas

7、beenresized,whichofthefollowinglayoutmanagerdidnotchangetheinternalcomponents'size?A.CardLayoutB.FlowLayoutC.BorderLayoutD.GridLayout5．Whichistherightstatementaboutexceptionhandling?A.Injava,allexceptionsarenecessarytobecaughtandhandled.B.The“catch”statementcatchesexcep

8、tionbytype-matching.C.Inthe“try-catch-finally”structure,theprogramwillexitafterexceptionhandling.D.Exceptionis