1.classA{2.publicStringtoString（）{3.return4”；4.}5.}6.classBextendsA{7.publicStringtoString（）{8.returnsuper.toString（）+3”；9.}10.}11.publicclassTest{12.publicstaticvoidmain（String[]args）{13.System.out.printIn（newB（））；14.}15.}Whatistheresult？（）A.Compilationsucceedsand4isprinted.B.Compilationsucceedsand43isprinted.C.Anerroronline9causescompilationtofail.D.Anerroronline14causescompilationtofail.E.Compilationsucceedsbutanexceptionisthrownatline9.
1.classA{2.publicStringtoString（）{3.return4”；4.}5.}6.classBextendsA{7.publicStringtoString（）{8.returnsuper.toString（）+3”；9.}10.}11.publicclassTest{12.publicstaticvoidmain（String[]args）{13.System.out.printIn（newB（））；14.}15.}Whatistheresult？（）
A.Compilationsucceedsand4isprinted.
B.Compilationsucceedsand43isprinted.
C.Anerroronline9causescompilationtofail.
D.Anerroronline14causescompilationtofail.
E.Compilationsucceedsbutanexceptionisthrownatline9.
相关考题：
1.classA{2.publicbytefileNumber(){3.returnl;4.}5.}6.7.ClassBextendsA{8.publicshortgetNumber(){9.return2;10.}11.12.publicshortgetNumber(){13.Bb=newB();14.System.out.printIn(b.getNumber());15.}16.}Whatistheresult（）?A.Compilationsucceedsandlisprinted.B.Compilationsucceedsand2printed.C.Anerroratline8causecompilationtofail.D.Anerroratline14causecomplicationtofail.E.Complicationsucceedsbutanexceptionisthrownatline14.
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.
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.
Whatproducesacompilererror?() A.classA{publicA（intx）{}}B.classA{}classBextendsA{B（）{}}C.classA{A（）{}}classB{publicB（）{}}D.classZ{publicZ（int）{}}classAextendsZ{}
InwhichtwocasesdoesthecompilersupplyadefaultconstructorforclassA?() A.classA{}B.classA{publicA（）{}}C.classA{publicA（intx）{}}D.classZ{}classAextendsZ{voidA（）{}}
publicclassA{2.voidA(){3.System.out.println(ClassA”);4.}5.publicstaticvoidmain(String[]args){6.newA();7.}8.}Whatistheresult?() A.ClassAB.Compilationfails.C.Anexceptionisthrownatline2.D.Anexceptionisthrownatline6.E.Thecodeexecuteswithnooutput.
有如下模板声明：templatetypename T1，typename 12class A；下列声明中，与上述声明不等价的是A．templateclass T1，class T2class A；B．templateclass T1，typename T2class A；C．templatetypename TI，class T2class A；D．templatetypename T1，T2class A；
若有类A与类B，则以下哪个不属于类的组合关系A．class A { B b; };B．class A { B* p; };C．class A { B bb[3]; };D．class A { public: fun(B b); };