单项选择题

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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单项选择题

publicclassTest{publicstaticvoidmain（Stringargs）{Stringfoo=args[1]；Stringbar=args；Stringbaz=args；System.out.printIn（baz=”＋baz）；}}Andtheoutput：Baz=2Whichcommandlineinvocationwillproducetheoutput？（）

A.JavaTest2222
B.JavaTest1234
C.JavaTest4242
D.JavaTest4321

单项选择题

packagefoo；importjava.util.Vector；privateclassMyVectorextendsVector{inti=1；publicMyVector（）{i=2；}}publicclassMyNewVectorextendsMyVector{publicMyNewVector（）{i=4；}publicstaticvoidmain（Stringargs）{MyVectorv=newMyNewVector（）；}}ThefileMyNewVector.javaisshownintheexhibit.Whatistheresult？（）
A.Compilationwillsucceed.
B.Compilationwillfailatline5.
C.Compilationwillfailatline6.
D.Compilationwillfailatline14.
E.Compilationwillfailatline17.

A.util.Vector；privateclassMyVectorextendsVector{inti=1；publicMyVector（）{i=2；}}publicclassMyNewVectorextendsMyVector{publicMyNewVector（）{i=4；}publicstaticvoidmain（Stringargs）{MyVectorv=newMyNewVector（）；}}ThefileMyNewVector.javaisshownintheexhibit.Whatistheresult？（）
A.Compilationwillsucceed.
B.Compilationwillfailatline5.
C.Compilationwillfailatline6.
D.Compilationwillfailatline14.
E.Compilationwillfailatline17.