资源描述：
《面向对象基础_参考答案(国外英语资料)》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、面向对象基础_参考答案One,Ⅰ.MultiplechoiceWhichofthecolumnoptionsisthedefaultconstructorfortheclasspublicclassTest{}?A.theTest();B.theTest(void);C.publicTest()D.publicTest(void);E.publicvoidTest()Theexecutionresultofthefollowingcodeis_E___?PublicclassA{Void(A){A.out.println("ClassA");}Publicstati
2、cvoidmain(String[]args)NewA();}}A.ClassAb.inline2C.compileerrord.throwanexceptioninline6Thereisnooutputaftertheexecutionofthecode***3,giventhefollowingcode:PublicclassConstOver{PublicConstOver(intx,inty,intz){3.}4.}Inthefollowingoptions,whichcanbedefinedasoverloadedconstructionmethodsi
3、ntheconcontentsclass:A.ConstOver()B.int.C.ConstOver(intz,inty,bytex){}D.ObjectConstOver(intx,inty,intz){}E.VoidConstOver(bytex,bytey,bytez){}Theexecutionofthefollowingcodeis__A___?//IllegalmodifierforparameterI;OnlyfinalispermittedA.compiledfailedb.compiledsuccessfully,output"0"C.compi
4、lesuccess,output"1"d.compilesuccess,output"2"Theexecutionofthefollowingcodeis__C___?Thecodecompilessuccessfullyandprints"s=".Thecodecompilessuccessfullyandprints"s=null"C.codecompilationfailsbecausesisinitializedD.codecompilationfailsbecausescannotbereferencedE.codecompilessuccessfully
5、,butNullPointerExceptionisthrownatruntime6,giventhefollowingcode:12.voidstart(){A=newA();B=newB();A.s(b);B=null;A=null;A.out.println("startcompleted");}Forobjectbcreatedinline14,whenwillthesystemrecycle_D___?A.afterline16.B.afterline17Afterthe18thline(afterthefunctionisfinished)DThegar
6、bagecollectorwillnotrecycletheobjectⅡ.Theprogramanalysisproblem1,fillinthecorrectcodeatthespecifiedlocation:PublicclassCircleStatic{StaticdoublePI=3.14;Inttheradius=100;Publicstaticvoidmain(String[]args){A.out.println(_pi_);//printthePI,CircleStaticc=newCircleStatic()...A.out.println./
7、/printtheradius}}2,thefollowingprocedureiswrong,pleaseamendandexplainwhy:PublicclassCircleStatic{ThestaticdoublePI=3.14;Inttheradius=100;Publicstaticvoidmain(String[]args)System.Theout.Println(PI);System.Theout.Println(radius);//staticmethodscannotbeuseddirectlyinnon-staticproperties
