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publicclassfoo{publicstaticvoidmain(String[]args){Strings;system.out.printIn(s=”＋s);}}Whatistheresult?()
A.Thecodecompilesand“s=”isprinted.
B.Thecodecompilesand“s=null”isprinted.
C.Thecodedoesnotcompilebecausestringsisnotinitialized.
D.Thecodedoesnotcompilebecausestringscannotbereferenced.
E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
参考答案
更多 “ publicclassfoo{publicstaticvoidmain(String[]args){Strings;system.out.printIn(s=”＋s);}}Whatistheresult?() A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled. ” 相关考题
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importjava.util.*；publicclassLetterASort{publicstaticvoidmain（String[]args）{ArrayListstrings=newArrayList（）；strings.add（?aAaA”）；strings.add（”AaA”）；strings.add（?aAa”）；strings.add（”AAaa”）；Collections.sort（strings）；for（Strings：strings）{System.out.print（s+）；}}}Whatistheresult？（）A.Compilationfails.B.aAaAaAaAAaaAaAC.AAaaAaAaAaaAaAD.AaAAAaaaAaAaAaE.aAaAaAaAaAAAaaF.Anexceptionisthrownatruntime.
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publicclassFoo{publicvoidmain(String[]args){system.out.printIn(HelloWorld.”);}}Whatistheresult?()
A.Anexceptionisthrown.B.Thecodedoesnocompile.C.“HelloWorld.”Isprintedtotheterminal.D.Theprogramexitswithoutprintinganything.
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publicclassX{publicstaticvoidmain(String[]args){strings=newstring(Hello”);modify(s);System.out.printIn(s);}publicstaticvoidmodify(Strings){s＋=world!”;}}Whatistheresult?()
A.Theprogramrunsandprints“Hello”B.Anerrorcausescompilationtofail.C.Theprogramrunsandprints“Helloworld!”D.Theprogramrunsbutabortswithanexception.
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publicclassX{publicstaticvoidmain(String[]args){Strings1=newString(true”);Booleanb1=newBoolean(true);if(s2.equals(b1)){System.out.printIn(Equal”);}}}Whatistheresult?()
A.Theprogramrunsandprintsnothing.B.Theprogramrunsandprints“Equal”C.Anerroratline5causescompilationtofail.D.Theprogramrunsbutabortswithanexception.
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publicclassfoo{staticStrings;publicstaticvoidmain(String[]args){system.out.printIn(s=”＋s);}}Whatistheresult?()
A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
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publicclassfoo{publicstaticvoidmain(string[]args)try{return;}finally{system.out.printIn(Finally”);}}Whatistheresult?()
A.Theprogramrunsandprintsnothing.B.Theprogramrunsandprints“Finally”C.Thecodecompiles，butanexceptionisthrownatruntime.D.Thecodewillnotcompilebecausethecatchblockismissing.
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publicclassFoo{publicstaticvoidmain(String[]args){try{return;}finally{System.out.println(Finally”);}}}Whatistheresult?()
A.FinallyB.Compilationfails.C.Thecoderunswithnooutput.D.Anexceptionisthrownatruntime.
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publicclassX{publicstaticvoidmain(Stringargs){strings=newstring(Hello”);modify(s);System.out.printIn(s);}publicstaticvoidmodify(Strings){s＋=world!”;}}Whatistheresult?()
A.Theprogramrunsandprints“Hello”B.Anerrorcausescompilationtofail.C.Theprogramrunsandprints“Helloworld!”D.Theprogramrunsbutabortswithanexception.
考题
publicclassfoo{publicstaticvoidmain(Stringargs){Strings;system.out.printIn(s=”＋s);}}Whatistheresult?()
A.Thecodecompilesand“s=”isprinted.B.Thecodecompilesand“s=null”isprinted.C.Thecodedoesnotcompilebecausestringsisnotinitialized.D.Thecodedoesnotcompilebecausestringscannotbereferenced.E.Thecodecompiles，butaNullPointerExceptionisthrownwhentoStringiscalled.
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