Thefilefile.txt”existsonthefilesystemandcontsinsASCIItext.Given:try{Filef=newFile(file.txt”);OutputStreamout=newFileOutputStream(f,true);}catch(IOException){}Whatistheresult?() A.Thecodedoesnotcompile.B.Thecoderunsandnochangeismadetothefile.C.Thecoderunsandsetsthelengthofthefileto0.D.Anexceptionisthrownbecausethefileisnotclosed.E.Thecoderunsanddeletesthefilefromthefilesystem.
Thefilefile.txt”existsonthefilesystemandcontsinsASCIItext.Given:try{Filef=newFile(file.txt”);OutputStreamout=newFileOutputStream(f,true);}catch(IOException){}Whatistheresult?()
A.Thecodedoesnotcompile.
B.Thecoderunsandnochangeismadetothefile.
C.Thecoderunsandsetsthelengthofthefileto0.
D.Anexceptionisthrownbecausethefileisnotclosed.
E.Thecoderunsanddeletesthefilefromthefilesystem.
相关考题：
importjava.io.*；publicclassForestimplementsSerializable{privateTreetree=newTree（）；publicstaticvoidmain（String[]args）{Forestf=newForest（）；try{FileOutputStreamfs=newFileOutputStream（”Forest.ser”）；ObjectOutputStreamos=newObjectOutputStream（fs）；os.writeObject（f）；os.close（）；}catch（Exceptionex）{ex.printStackTrace（）；}}}classTree{}Whatistheresult？（）A.Compilationfails.B.Anexceptionisthrownatruntime.C.AninstanceofForestisserialized.D.AinstanceofForestandaninstanceofTreearebothserialized.
staticvoidtest（）throwsError{if（true）thrownewAssertionError（）；System.out.print（”test）；}publicstaticvoidmain（String[]args）{try{test（）；}catch（Exceptionex）{System.out.print（”exception）；}System.out.print（”elld）；}Whatistheresult？（）A.endB.Compilationfails.C.exceptionendD.exceptiontestendE.AThrowableisthrownbymain.F.AnExceptionisthrownbymain.
importjava.io.IOException；publicclassExceptionTest（publicstaticvoidmain（String[]args）try（methodA（）；）catch（IOExceptione）（system.out.printIn（CaughtIOException”）；）catch（Exceptione）（system.out.printIn（CaughtException”）；））publicvoidmethodA（）{thrownewIOException（）；}Whatistheresult？（）A.Thecodewillnotcompile.B.Theoutputiscaughtexception.C.TheoutputiscaughtIOException.D.Theprogramexecutesnormallywithoutprintingamessage.
publicclassAextendsThread{A（）{setDaemon（true）；}publicvoidrun（）{（newB（））.start（）；try{Thread.sleep（60000）；}catch（InterruptedExceptionx）{}System.out.println（Adone”）；}classBextendsThread{publicvoidrun（）{try{Thread.sleep（60000）；}catch（InterruptedExceptionx）{}System.out.println（Bdone”）；}}publicstaticvoidmain（String[]args）{（newA（））.start（）；}}Whatistheresult？（）A.AdoneB.BdoneC.AdoneBdoneD.BdoneAdoneE.Thereisnoexceptionthattheapplicationwillprintanything.F.Theapplicationoutputs“Adone”and“Bdone”，innoguaranteedorder.
WhichtwoconstructanOutputSreamthatappendstothefile“file.txt”?() A.OutputStreamout=newFileOutputStream（“file.txt”）；B.OutputStreamout=newFileOutputStream（“file.txt”，“append”）；C.FileOutputStreamout=newFileOutputStream（“file.txt”，true）；D.FileOutputStreamout=newFileOutputStream（newfile（“file.txt”））；E.OutputStreamout=newFileOutputStream（newFile（“file.txt”）true）；
importjava.io.IOException；publicclassExceptionTest（publicstaticvoidmain（Stringargs）try（methodA（）；）catch（IOExceptione）（system.out.printIn（CaughtIOException”）；）catch（Exceptione）（system.out.printIn（CaughtException”）；））publicvoidmethodA（）{thrownewIOException（）；}Whatistheresult？（）A.Thecodewillnotcompile.B.Theoutputiscaughtexception.C.TheoutputiscaughtIOException.D.Theprogramexecutesnormallywithoutprintingamessage.
Whatwritesthetext“”totheendofthefile“file.txt”?() A.OutputStreamout=newFileOutputStream（“file.txt”）； Out.writeBytes（“/n”）；B.OutputStreamos=newFileOutputStream（“file.txt”，true）； DataOutputStreamout=newDataOutputStream（os）；out.writeBytes（“/n”）；C.OutputStreamos=newFileOutputStream（“file.txt”）； DataOutputStreamout=newDataOutputStream（os）；out.writeBytes（“/n”）；D.OutputStreamos=newOutputStream（“file.txt”，true）； DataOutputStreamout=newDataOutputStream（os）；out.writeBytes（“/n”）；
为了向文件hello.txt尾部追加数据，下列哪个是正确创建指向hello.txt的流（）A．try{ OutputStream out=new FileOutputStream("hello.txt"); }catch(IOException e) { }B．try{ OutputStream out=new FileOutputStream("hello.txt",true); }catch(IOException e) { }C．try{ OutputStream out=new FileOutputStream("hello.txt",false); }catch(IOException e) { }D．try{ OutputStream out=new OutputStream("hello.txt",true); }catch(IOException e) { }
17、下面哪些选项能够创建一个OutputStream流，并且可以将内容附加到“file.txt”文件中？（）A．OutputStream out=new FileOutputStream(“file.txt”);B．OutputStream out=new FileOutputStream(“file.txt”,”append”);C．FileOutputStream out=new FileOutputStream(“file.txt”,true);D．FileOutputStream out=new FileOutputStream(“file.txt”);