光庭信息技术股份2-java笔试题

光庭公 Java笔试一、单选题:2Object[]myObjects=newnewnewnewfor(inti=0;i31.System.out.print(”}ACompilationfailsduetoanerrorinline29.B、Compilationfailsduetoanerrorinline23.C、AClassCastExceptionoccursinline29.DAClassCastExceptionoccursinlineclassTestApublicvoidstart(){System.out.println(”TestA”);}publicclassTestBextendsTestApublicvoidstart(){System.out.println(”TestB”);publicstaticvoidmain(String[]args)((TestA)new}}AAnexceptionisthrownatruntime.B、TestAC、D、Compilation3、11publicclassTestpublicstaticvoidmain(String[]args)intxbooleanb1=booleanb2=false;if((x==4)&&System.out.print(”lSystem.out.print(”2if((b2=true)&&System.out.print(”3}}A、2B、1C、D、4、finallyAB、如果try块后面没有catch块时，finallyCDinterfaceTestA{StringtoString();publicclassTestpublicstaticvoidmain(String[]args)System.out.println(newTestA()publicStringtoString(){return“test”;}}ACompilationfailsbecauseofanerrorinline1.B、Anexceptionisthrownatruntime.CtestD、 classShapeintint voidpublicvoidsetAnchor(intx,inty)this.x=this.y=}}andaclassCirclethatextendsandfullyimplementstheShapeclass.Whichiscorrect?A、CirclecnewBShapesnewCircle();C、Shapes=newD、Shapes=newclassOnepublicOne(){System.out.print(1);}classTwoextendsOnepublicTwo(){System.out.print(2);}classThreeextendsTwopublicThree(){System.out.print(3);}publicclasspublicstaticvoidmain(String[]argv){newThree();}A、B、C、D、A、privatevoidmethod1();Bfinalpublicvoidmethod4();C、publicvoidmethod2();DprotectedvoidpublicenumTitleMR(”Mr.”),MRS(”Mrs.”),privatefinalStringprivateTitle(Stringt){title=t;publicStringformat(Stringlast,Stringfirst)returntitle+““+first+““+}}publicstaticvoidmain(String[]args)}ACompilationfailsbecauseofanerrorinline15.B、Anexceptionisthrownatruntime.CCompilationfailsbecauseofanerrorinline12.D、Mr.JohnDoeinterfaceFoo{intbar();publicclassSpritepublicintfubar(Foofoo){returnfoo.bar();publicvoidtestFoo()//insertcode}}下列哪行代 A、newFoopublicintbarreturn1;B、Foo{publicintbar(){return1;}}C、newclassFoopublicintbarreturn1;D、newFoo(){publicintbar(){return1;}}11、1.publicinterfaceApublicvoiddoSomething(String}publicclassAImplimplementsApublicvoiddoSomething(Stringmsg){}publicclassBpublic t()//morecode}publicStringexecute()//morecode}}publicclassCextendsBpublic t()//morecode}publicObjectexecute()//morecode}}ACompilationofclassCwillfailbecauseofanerrorinlineB、CompilationofclassAImplwillfailbecauseofanerrorinline2.C、CompilationofclassCwillfailbecauseofanerrorinline2.DCompilationwillsucceedforallclassesandpublicstaticvoidmain(String[]args)Integeri=uewInteger(1)+newswitch(i)case3:System.out.println(”three”);default:System.out.println(”other”);}}A、BCompilationfailsbecauseofanerroronline12C、Anexceptionisthrownatruntime.D、.packagepublicenumColor{RED,GREEN,BLUEpackage//insertcodepublicclassBetaColorg=publicstaticvoidmain(String[]{System.out.println(GREEN);}类Beta和enumColor在不同的包中，下列哪行代 Aimportsun.scjp.Colorimportstaticsun.scjp.Color.*;B、importstaticsun.scjp.Color.*;Cimportsun.scjp.*;importstaticsun.scjp.Color.*;D、importsun.scjp.Color.*;publicvoidtestIfA()if(testIfB(”True”))}else}}publicBooleantestIfB(Stringstr)return}方法testIfAA、BAnexceptionisthrownatruntime.C、NottrueDCompilationfailsbecauseofanerroratlineA、=B&&D、A、java.lang.ThreadB、Cjava.lang.NumberD、java.lang.Double17、Java是从（）A、BBASICC、C++D、publicclassApublic t()}public t()return}public t(intx)return}}ACompilationfailsbecauseofanerrorinlineB、CompilationsucceedsandnoruntimeerrorswithclassAoccur.C、Compilationfailsbecauseofanerrorinline4.D、Anexceptionisthrownat20.publicclassCreditCard{privateStringprivateIntegerpublicStringownerName;publicvoidsetCardlnformation(StringStringIntegerlimit)this.cardlD=this.ownerName=this.limit=}}ATheownerNamevariablebreaksencapsulation.B、Thecodedemonstratespolymorphism.C、TheclassisfullyD、ThecardlDandlimitvariablesbreak 以下JSP网页时的输出结果是什么?intb=0;a++;b++;%>Aa=2b=1Ba=2b=2Ca=0b=0D、a=1二、判断题:21、publicclassSomethingpublicintaddOne(finalintx){return++x;}}2、shorts11;s13、Servlet中，由表单提交来的请求用doPost()方法处理，由 发起的请求用doGet()方法处理。4、两个对象值相同(x.equals(y)==true)，但却可有不同的hashcode。5、interfaceA{intx=0;}classB{intx}classCextendsBimplementsA{publicvoidpX(){}publicstaticvoidmain(String[]args){newC().pX();}}6、publicclassSomethingpublicstaticvoidmain(String[]args){Othero=newOther();new}publicvoidaddOne(finalOthero)}}classOther{publicinti;} classSomething StringdoSomething}8、publicclassSomethingpublicstaticvoidmain(String[]args){Othero=newOther();new}publicvoidaddOne(finalOthero){}}classOther{publicinti;} class