publicclassTest{2.publicstaticvoidmain(Stringargs[]){3.classFoo{4.publicinti=3;5.}6.Objecto=(Object)newFoo();7.Foofoo=(Foo)o;8.System.out.printIn(foo.i);9.}10.}Whatistheresult?() A.Compilationwillfail.B.Compilationwillsucceedandtheprogramwillprint“3”C.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline6.D.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline7.
publicclassTest{2.publicstaticvoidmain(Stringargs[]){3.classFoo{4.publicinti=3;5.}6.Objecto=(Object)newFoo();7.Foofoo=(Foo)o;8.System.out.printIn(foo.i);9.}10.}Whatistheresult?()
A.Compilationwillfail.
B.Compilationwillsucceedandtheprogramwillprint“3”
C.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline6.
D.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline7.
相关考题：
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.
publicclassTest{publicstaticvoidmain(String[]args){stringfoo=blue”;stringbar=foo;foo=green”;System.out.printIn(bar);}}Whatistheresult?() A.Anexceptionisthrown.B.Thecodewillnotcompile.C.Theprogramprints“null”D.Theprogramprints“blue”E.Theprogramprints“green”
publicclassFooimplementsRunnable(3.publicvoidrun(Threadt){4.system.out.printIn(Running.”);5.}6.publicstaticvoidmain(String[]args){7.newthread(newFoo()).start();8.)9.)Whatistheresult?() A.Anexceptionisthrown.B.Theprogramexistswithoutprintinganything.C.Anerroratline1causescompilationtofail.D.Anerroratline6causesthecompilationtofail.E.“Running”isprintedandtheprogramexits.
publicclasstest(2.publicstaticvoidmain(stringargs[]){3.int1=0;4.while(i){5.if(i==4){6.break;7.}8.＋＋i;9.}10.11.}12.)Whatisthevalueofiatline10?() A.0B.3C.4D.5E.Thecodewillnotcompile.
publicclassTest{publicstaticvoidmain(Stringargs[]){classFoo{publicinti=3;}Objecto=(Object)newFoo();Foofoo=(Foo)o;System.out.println(i=＋foo.i);}}Whatistheresult?() A.i=3B.Compilationfails.C.AClassCastExceptionisthrownatline6.D.AClassCastExceptionisthrownatline7.
publicclassTest{publicstaticvoidmain(Stringargs){stringfoo=blue”;stringbar=foo;foo=green”;System.out.printIn(bar);}}Whatistheresult?() A.Anexceptionisthrown.B.Thecodewillnotcompile.C.Theprogramprints“null”D.Theprogramprints“blue”E.Theprogramprints“green”
publicclassFooimplementsRunnable(publicvoidrun(Threadt){system.out.printIn(Running.”);}publicstaticvoidmain(Stringargs){newthread(newFoo()).start();})Whatistheresult?() A.Anexceptionisthrown.B.Theprogramexistswithoutprintinganything.C.Anerroratline1causescompilationtofail.D.Anerroratline6causesthecompilationtofail.E.“Running”isprintedandtheprogramexits.
publicclassTest{publicstaticvoidmain(Stringargs){classFoo{publicinti=3;}Objecto=(Object)newFoo();Foofoo=(Foo)o;System.out.printIn(foo.i);}}Whatistheresult?() A.Compilationwillfail.B.Compilationwillsucceedandtheprogramwillprint“3”C.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline6.D.CompilationwillsucceedbuttheprogramwillthrowaClassCastExceptionatline7.
publicclassTest{2.publicstaticvoidmain(Stringargs){3.unsignedbyteb=0;4.b－－;5.6.}7.}Whatisthevalueofbatline5?() A.-1B.255C.127D.Compilationwillfail.E.Compilationwillsucceedbuttheprogramwillthrowanexceptionatline4.