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classA{publicintgetNumber(inta){returna＋1;}}classBextendsA{publicintgetNumber(inta){returna＋2}publicstaticvoidmain(Stringargs){Aa=newB();System.out.printIn(a.getNumber(0));}}Whatistheresult?()
A.Compilationsucceedsand1isprinted.
B.Compilationsucceedsand2isprinted.
C.Anerroratline8causescompilationtofail.
D.Anerroratline13causescompilationtofail.
E.Anerroratline14causescompilationtofail.
参考答案
更多 “ classA{publicintgetNumber(inta){returna＋1;}}classBextendsA{publicintgetNumber(inta){returna＋2}publicstaticvoidmain(Stringargs){Aa=newB();System.out.printIn(a.getNumber(0));}}Whatistheresult?() A.Compilationsucceedsand1isprinted.B.Compilationsucceedsand2isprinted.C.Anerroratline8causescompilationtofail.D.Anerroratline13causescompilationtofail.E.Anerroratline14causescompilationtofail. ” 相关考题
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class A{public int getNumber(int a){return a+1;}}class B extends A{public int getNumber(int a, char c){return a+2;}public static void main(String[] args){B b=new B();System.out.println(b.getNumber(0));}}what is the result?()A.compilation succeeds and 1 is printedB.compilation succeeds and 2 is printedC.compilation succeeds and 3 is printedD.An error at this program cause compilation to fail
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Whichstatements，wheninsertedattheindicatedpositioninthefollowingcode，willcausearuntimeexceptionwhenattemptingtoruntheprogram？（）classA{}classBextendsA{}classCextendsA{}publicclassQ3ae4{publicstaticvoidmain（Stringargs[]）{Ax=newA（）；By=newB（）；Cz=newC（）；//insertstatementhere}}A.x=y；B.z=x；C.y=（B）x；D.z=（C）y；E.y=（A）y；
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1.classA{2.publicbytegetNumber（）{3.return1；4.}5.}6.7.classBextendsA{8.publicshortgetNumber（）{9.return2；10.}11.12.publicstaticvoidmain（Stringargs[]）{13.Bb=newB（）；14.System.out.printIn（b.getNumber（））15.}16.}Whatistheresult？（）A.Compilationsucceedsand1isprinted.B.Compilationsucceedsand2isprinted.C.Anerroratline8causescompilationtofail.D.Anerroratline14causescompilationtofail.E.Compilationsucceedsbutanexceptionisthrownatline14.
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1.classA{2.publicintgetNumber（inta）{3.returna+1；4.}5.}6.7.classBextendsA{8.publicintgetNumber（inta）{9.returna+210.}11.12.publicstaticvoidmain（Stringargs[]）{13.Aa=newB（）；14.System.out.printIn（a.getNumber（0））；15.}16.}Whatistheresult？（）A.Compilationsucceedsand1isprinted.B.Compilationsucceedsand2isprinted.C.Anerroratline8causescompilationtofail.D.Anerroratline13causescompilationtofail.E.Anerroratline14causescompilationtofail.
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classA{publicA（）{System.out.println（hellofroma”）；}}classBextendsA{publicB（）{System.out.println（hellofromb”）；super（）；}}publicclassTest{publicstaticvoidmain（Stringargs[]）{Aa=newB（）；}}Whatistheresultwhenmainisexecuted？（）A.Compilationfails.B.hellofromaC.hellofrombD.hellofrombhellofromaE.hellofromahellofromb
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classA{publicbytegetNumber(){return1;}}classBextendsA{publicshortgetNumber(){return2;}publicstaticvoidmain(Stringargs[]){Bb=newB();System.out.println(b.getNumber());}}Whatistheresult?()
A.1B.2C.Anexceptionisthrownatruntime.D.Compilationfailsbecauseofanerrorinline8.E.Compilationfailsbecauseofanerrorinline14.
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classA{publicStringtoString（）{return4”；}}classBextendsA{8.publicStringtoString（）{returnsuper.toString（）+3”；}}publicclassTest{publicstaticvoidmain（Stringargs）{System.out.printIn（newB（））；}}Whatistheresult？（）A.Compilationsucceedsand4isprinted.B.Compilationsucceedsand43isprinted.C.Anerroronline9causescompilationtofail.D.Anerroronline14causescompilationtofail.E.Compilationsucceedsbutanexceptionisthrownatline9.
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publicclassX{publicstaticvoidmain(Stringargs){inta=newint[1]modify(a);System.out.printIn(a[0]);}publicstaticvoidmodify(inta){a[0]＋＋;}}Whatistheresult?()
A.Theprogramrunsandprints“0”B.Theprogramrunsandprints“1”C.Theprogramrunsbutabortswithanexception.D.Anerror“possibleundefinedvariable”atline4causescompilationtofail.E.Anerror“possibleundefinedvariable”atline9causescompilationtofail.
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classA{publicbytegetNumber(){return1;}}classBextendsA{publicshortgetNumber(){return2;}publicstaticvoidmain(Stringargs){Bb=newB();System.out.printIn(b.getNumber())}}Whatistheresult?()
A.Compilationsucceedsand1isprinted.B.Compilationsucceedsand2isprinted.C.Anerroratline8causescompilationtofail.D.Anerroratline14causescompilationtofail.E.Compilationsucceedsbutanexceptionisthrownatline14.
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