publicvoidaddStrings(Listlist){12.list.add(”foo”);13.list.add(”bar”);14.}Whatmustyouchangeinthismethodtocompilewithoutwarnings?()A.addthiscodeafterline11：list=（List）list；B.changelines12and13to：list.add（”foo”）；list.add（”bar”）；C.changethemethodsignatureonli

题目
publicvoidaddStrings(Listlist){12.list.add(”foo”);13.list.add(”bar”);14.}Whatmustyouchangeinthismethodtocompilewithoutwarnings?()

A.addthiscodeafterline11：list=（List）list；

B.changelines12and13to：list.add（”foo”）；list.add（”bar”）；

C.changethemethodsignatureonline11to：publicvoidaddStrings（List<extendsString>list）{

D.changethemethodsignatureonline11to：publicvoidaddStrings（List<superString>list）{

E.Nochangesarenecessary.Thismethodcompileswithoutwarnings.

相似考题

1.Given：fooandbararepublicreferencesavailabletomanyotherthreads，fooreferstoaThreadandbarisanObject.Thethreadfooiscurrentlyexecutingbar.wait（）.Fromanotherthread，whatprovidesthemostreliablewaytoensurethatfoowillstopexecutingwait（）？（）A.foo.notify（）；B.bar.notify（）；C.foo.notifyAll（）；D.Thread.notify（）；E.bar.notifyAll（）；F.Object.notify（）；

2.publicclassBase{publicstaticfinalStringFOO=foo”；publicstaticvoidmain（String[]args）{Baseb=newBase（）；Subs=newSub（）；System.out.print（Base.FOO）；System.out.print（Sub.FOO）；System.out.print（b.FOO）；System.out.print（s.FOO）；System.out.print（（（Base）s）.FOO）；}}classSubextendsBase{publicstaticfinalStringFOO=bar；}Whatistheresult？（）A.foofoofoofoofooB.foobarfoobarbarC.foobarfoofoofooD.foobarfoobarfooE.barbarbarbarbarF.foofoofoobarbarG.foofoofoobarfoo

3.fooandbararepublicreferencesavailabletomanyotherthreads.fooreferstoaThreadandbarisanObject.Thethreadfooiscurrentlyexecutingbar.wait（）.Fromanotherthread，whichstatementisthemostreliablewaytoensuethatfoowillstopexecutingwait（）？A.foo.notify（）；B.bar.notify（）；C.foo.notifyAll（）；D.Thread.notify（）；E.bar.notiFYAll（）；F.Object.notify（）；

4.Giventhefully-qualifiedclassnames：com.foo.bar.Dogcom.foo.bar.blatz.Bookcom.bar.Carcom.bar.blatz.SunWhichgraphrepresentsthecorrectdirectorystructureforaJARfilefromwhichthoseclassescanbeusedbythecompilerandJYM？（）A.JarAB.JarBC.JarCD.JarDE.JarE

参考答案和解析
参考答案：D
更多“publicvoidaddStrings(Listlist){12.list.add(”foo”);13.list.add(”bar”);14.}Whatmustyouchangeinthismethodtocompilewithoutwarnings?() ”相关问题

  • 第1题：

    Stringfoo=blue”;Boolean[]bar=newBoolean[1];if(bar[0]){foo=green”;}Whatistheresult?()

    A.Foohasthevalueof“”

    B.Foohasthevalueofnull.

    C.Foohasthevalueof“blue”

    D.Foohasthevalueof“green”

    E.Anexceptionisthrown.

    F.Thecodewillnotcompile.


    参考答案：F

  • 第2题：

    Click the Exhibit button. Given the fully-qualified class names: com.foo.bar.Dog com.foo.bar.blatz.Book com.bar.Car com.bar.blatz.Sun Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM? （）

    A.Jar A

    B.Jar B

    C.Jar C

    D.Jar D

    E.Jar E


    参考答案：A

  • 第3题：

    Given：fooandbararepublicreferencesavailabletomanyotherthreads.fooreferstoaThreadandbarisanObject.Thethreadfooiscurrentlyexecutingbar.wait（）.Fromanotherthread，whatprovidesthemostreliablewaytoensurethatfoowillstopexecutingwait（）？

    A.foo.notify（）；

    B.bar.notify（）；

    C.foo.notifyAll（）；

    D.Thread.notify（）；

    E.bar.notifyAll（）；


    参考答案：E

  • 第4题：

    intindex=1;int[]foo=newint[3];intbar=foo[index];intbaz=bar＋index;Whatistheresult?()

    A.Bazhasthevalueof0

    B.Bazhasthevalueof1

    C.Bazhasthevalueof2

    D.Anexceptionisthrown.

    E.Thecodewillnotcompile.


    参考答案：B

  • 第5题：

    Given:Whichtwocodefragments,insertedindependentlyatline5,willcompilewithoutwarnings?()

    A.publicvoidaddStrings(Listlist){

    B.publicvoidaddStrings(List<String>list){

    C.publicvoidaddStrings(List<?superString>list){

    D.publicvoidaddStrings(List<?extendsString>list){B,C


    参考答案：B, C

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