第十三章Java驅(qū)動(dòng)編第一章練習(xí)題（JavaC1．下列哪項(xiàng)不是JDK所包含的內(nèi)容？（選一項(xiàng)JavaJavaEEJavad2．下列關(guān)于JDK、JRE和JVMA．JDK中包含了JRE，JVM中包含了JREB．JRE中包含了JDK，JDK中包含了JVMC．JRE中包含了JDK，JVM中包含了JRED．JDK中包含了JRE，JRE中包含了a3javaa4．JDKjavadocA．生成JavaB．編譯JavaC．執(zhí)行JavaD．測(cè)試JavaAcd5．以下哪些包是Java標(biāo)準(zhǔn)庫(kù)中常用的包？（選三項(xiàng)B．javax．servlet.httpC．java.iod6．使用JDK工具生成的JavaA．XML格式D．HTMLac7．以下關(guān)于JVM的敘述，哪項(xiàng)正確？（選兩項(xiàng)）A．JVM運(yùn)行于操作系統(tǒng)之上，它依賴于操作系統(tǒng)B．JVM運(yùn)行于操作系統(tǒng)之上，它與操作系統(tǒng)無(wú)關(guān)C．JVM支持Java程序運(yùn)行，它能夠直接運(yùn)行JavaD．JVM支持Java程序運(yùn)行，它能夠直接運(yùn)行Javac8．以下關(guān)于支持JavaJava可在SolarisJava可在WindowsJava語(yǔ)言與平臺(tái)無(wú)關(guān)。JavaJava語(yǔ)言與平臺(tái)無(wú)關(guān)。JavaB?9．以下關(guān)于Applet和Java-個(gè)Applet就是一段JavaApplet是一種特殊的Java程序，它需要運(yùn)行在WebApplet是一種特殊的Java程序，它需要運(yùn)行在WebApplet是一種JavaSEAd?10．以下關(guān)于JavaHotSpot的描述，哪兩項(xiàng)錯(cuò)誤？（選兩項(xiàng)JavaHotSpot是一種熱編譯技術(shù)，在編譯JavaJavaHotSpot是一種熱編譯技術(shù)，在運(yùn)行JavaJavaHotSpotJavaHotSpot B?13．JVM在執(zhí)行一個(gè)Javaa14．當(dāng)運(yùn)行—個(gè)Javajava1javac1java1java1+ab15．以下關(guān)于Java文件名的敘述，正確的有？（選兩項(xiàng)Java源文件的擴(kuò)展名應(yīng)為JavaJava一個(gè)Java源文件中只能包含一個(gè)JavaAABDCA下列哪項(xiàng)不屬于Javaint下列哪項(xiàng)是Java語(yǔ)言中所規(guī)定的注釋樣式？（選三項(xiàng)C．D．下列哪項(xiàng)不是Java現(xiàn)有如下五個(gè)Linel:inta_really_really_really_long_variable_name=5;Line2:int Line4：int$dollars=8;line5:intopercent=9;C.D.class staticint }classMiddleextendsToppublic staticvoidmain Middlem=newSystem.out.println(x); B.classPasserstaticfinalint staticvoidmain Passer()．goSystem.out.print(x); voidgo(int System.out 10.classWrenchpublicstaticvoid Wrenchw=new Wrenchw2=neww2=go(w,w2)；5.System.out.print(w2==w); staticWrenchgo(Wrench Wrench Wrenchwr3=wrl;wrl=wr2;return}} intpublicstaticvoid Wrench2w=new Wrench2w2=go(w, System.out.print(w2.)staticWrench2go(W 15 return classTest2 staticvoidmain(String shorta，b,C；}}short表達(dá)式：1-2/5+2k59 Stringsl=S+456;請(qǐng)問(wèn)sl基本數(shù)據(jù)類型float publicstaticvoidmain booleanbooleanshortZ=42; System. Z=z=1012131415class voidmain(String[] for(int i=0;i<lO;i++){System.out.print}}}D． voidmain(String[] intx=6；ifSystem.out.println("x>l");elseif(x>5)System.out.println("x>5");elseif(x<10)System.out.println("x<lO");elseif(x<29)System.out.println("x<29");.out．rintln）;}}C．x<10class voidmain(String[] int[5] myarray={10,11,12,13,14);intfor(intx ：myarray)System.out.println("sum=}}下列有關(guān)數(shù)組的中，正確的是哪項(xiàng)？（選兩項(xiàng)int int[5]int已知數(shù)組arrayarray.size- staticvoidmain(String[] intX=5：switch(x){casel：case2：case3：trn）;case4：casecaseout．rintln；out．rintln）;)})A.一季度33

為將數(shù)組myArray36，現(xiàn)采取以下編碼：int[]myArray=newint[3]; 數(shù)組myArray363數(shù)組myArray363數(shù)組myArraymyArray363 staticvoidmain booleanintif((++i>2) 7．if((++i>4) ll System.out.println}}65publicclassTesterpublicstaticvoidmain(String[] Integer Integerintx3=new }class publicstaticV.id }}class publicstaticvoidmain inti=5：4．System.out.print("4"+i+"");5．System.out.print(i+5+"7"); 8．994545 Stringnames names names String[3]names={"zhang","wang",class staticvoidmain intwhile(++x<4) 7．System.out.println( 9．class publicstaticvoidmain booleanX=booleanshortZ=20; if((y==true)|| System.out.println(}}Z=class publicstaticvoidmain intintfor z<3； }System.out.println}}ID12131415別下列類Account的構(gòu)造方法中，正確的是Account(StringAccount AccountNewAccount(String類Account中字段正確的是哪項(xiàng) Accountf) Stringname=l.0；doubleamount="Mike";) Stringname;double) name="Mike,,, )類Account中方法正確的是哪一項(xiàng) Accountf) voiddeposit()；} voiddeposit(){))classAccountf )下列有關(guān)類的代碼片段，哪一項(xiàng)是正確的packageschool; java.sql.*；classStudent{}importjava．sql.*；packageschool; Student)packageschool;classStudent{} java.packageschool;importjava.sql.*；privateStringname;classStudent{}有關(guān)newnewnewnewnew所創(chuàng)建的對(duì)象一定存在變下列哪些是方法 add(inta)的重載方法？（選三項(xiàng) add(long add(intpublicvoidadd(long add(float

我們定義一個(gè)Account Stringname;／／賬戶Stringamount; Account(String voiddepositdouble )voidwithdrawdouble }) Stringname;／／賬戶doujole Account(double voiddepositdouble )voidwithdrawdouble )) Stringname;／／賬戶double Account(String voiddepositdoublemount){)voidwithdrawdouble ))classAccountfStringname;／／賬戶doubleamount;／／金額Account(Stringname){ voiddeposit(){／／存款)voidwithdraw(){))class staticint'publicstaticvoidmain intBanana2b=new voidgo(int System.out.println}} classTestFoointString String {return voidsetX int} )FDirectionDirectioninta-Direction.NORTH;nDirectiondirection=2；packageutils;publicclassRep{publicstaticStringtwice(Strings){returns+s}l.//insertcodepublicclasspublicstaticvoidmain System.out.println(twice(" importimportimportstaticstaticimport privateintX-2；staticint voidmethod(){finalinti=100;intj classCinner{publicvoid}}}}在Here處可以的變量是哪些？（選三項(xiàng) 現(xiàn)有如F|一一 |一一 |一一 |一一||l-- class Alphaa；Betab; packagepackageimportimport兩項(xiàng)

2packagepublicclasspublicstaticvoid classpublicstaticvoid //insertcode} Find3行將編譯并產(chǎn)生輸出“doX”？（B．X．doX()；D.x.XmyX=new710 1213AB1415CD．便于publicclasspublicvoidchange(int)publicclassChildextends／／覆蓋父類change}下列哪個(gè)是正確的覆蓋了父類的change方法protectedvoidchange(intpublicvoidchange(int intpublicvoidchange(intpublicvoidchange(String

為了使得System.out.println()輸出對(duì)象的時(shí)候得到有意義的信我們應(yīng)該覆蓋Objectt{-的哪個(gè)方法？publicclasspublicclassCatextendsCatc-newCat()；Petp= Petp=(Pet)cPetp=(Pet)cPetp=Pet)cpublicclassPet{publicvoidspeak(){ystem.out.rt（"pt"}}publicclassCatextendsPet{pulolicvoid }}publicclassDogextendsPet( }} {newCat(),newDog(),nexPet()};for(inti=O;i<p.length;i++)p[i]B.CatCatC.CatDogD.CatDogclass classHarrierextendsDog class staticvoidmain Dogdl=newHarrierhl=newDogHarrier (Harrier)Harrier A.2DogB.2HarrierC.3Harrierclass Cat(int {System.out.print{"cat"+c+" classSubCatextends SubCat(intc){super(5);System.out.print this publicstaticvoidmain SubCats=new cat5cableclassGuy{String {return classCowboyextendsGuy Stringgreet() classSurferextendsGuy (Stringgreet() (return"dude!";} class publicstaticvoidmain guys (newGuy(),newCowboy(),new for(Guyg：guys)9.System.out.print(g.greet()};} hihowdyc7D8class intdolt(long return classUnderextends ／／insertcode7．shortdolt(int return intdolt(longXrlongy) return4; privateintdolt(shorty) return4; protectedintdolt(longx) return4; 6行，有幾個(gè)可以通過(guò)編譯？ 12classBeverageBeverage System.out.print("beverage classBeerextendsBeveragepublicstaticvoidmain{string[]args)Beerb=newBeer(14) publicintBeer(intx)this()System.out.print("beerl") publicBeer(){System.out.print("beer2");13.結(jié)果是什么beerlbeer2beveragebeer2beerl現(xiàn)有classBirdvoidtalk(){System.out.print("chirp"); classParrot2extendsBirdprotectedvoidtalk(){ opublicstaticvoidmain(String[]args)Bird[]birds={newBird(),newParrot2()for(Birdb:b.talk() 結(jié)果是什么chirpo classSuperFoodoStuff(int returnnew classFooextends ／／insertcode 和四個(gè)FoodoStuff(int returnnew FoodoStuff(intx) returnnewSuperFoo()； SuperFoodoStuff(intx) returnnewFoo(); SuperFoodoStuff(inty) returnnewSuperFoo(); 8 D．class ／／tectedHorseRadish(intx) 4.System.out.println("bokchoy"); classWasabiextends publicstaticvoidmain Wasabiw-newWasabi(); bokchoy（兩項(xiàng)protected {thisprotected ／／justa newHorseRadish.ADDCDB．抽象類的必須包含 下列有關(guān)抽象方法敘述正確的是哪項(xiàng)？（選兩項(xiàng)asbtractinterfaceC{intpublicinterfaceAimplements publicinterface {int interface 55interface void //insertcodeherepublicclassHouseCatimplements publicvoid 9．和以下三個(gè)接口interfaceFelineextends interfaceFelineextends{void}interfaceFelineextends{void{ 5 interfaceColor interface //insertcode和以下足六個(gè)classBoatextendsColor,extendsWeight classBoatextendsColorandWeight classBoatextendsColor,Weight classBoatimplementsColor, implementsWeight classBoatimplementsColorandWeight classBoatimplementsColor, 3 77class String publicclassBlueextends ／／insertcode 和四個(gè)publicStringgetRGB(){return"blue";}StringgetRGB(){return"blue";)privateStringgetRGB(){return"blue";}protectedStringgetRGB(){return"blue";)6行，有幾個(gè)可以通過(guò)編譯？ 8class //insertcode publicclassBlue2extends String 7．和4個(gè) StringgetRGB()；StringgetRGB(); String String2O12D399class staticintpublic }classMiddleextends publicstaticvoid Middlem=newMiddle();9.System.out.println(x)j 234packagepublicclass publicstaticvoid {System.out.print importclass publiCstaticvoidmain XmyX=new x.XmyX2=new myx2 9．Find4Find5Find6doXdoXdoX

現(xiàn)有classTreeprivatestaticStringtree="treeStringgetTree return classElmextendsTreeprivatestaticStringtree="elmpublicstaticvoidmain newElm().go(new voidgo(Tree s t.getTree() Elm().getTree())System.out.println(s)結(jié)果為

elmelmelmtreeelmelmtreeelmelmtreeelmtree現(xiàn)有interfaceAnimalvoideat()3.//insertcodeherepublicclassHouseCatextendsFelinepublicvoideat(){9.classFelineimplementsAnimal{ voideat(); classFelineimplementsAnimal{publicvoideat();}classFelineimplementsAnimal{publicvoideat(){} classFelineimplementsAnimal{ publicvoideat();}A.B.C. 131.interface voidgo(); classAimplementsI{}classCextends void 136interfaceData{publicvoidclassInfo voidData和InfopublicclassEmployeeimplementsInfoextendsData publicvoidload() {／*dosomething*／))publicclassEmployeeextendsInf.implementsData{publicvoidload() {／*dosomething*／}}c.publicclassEmpl.yeeimplementsInfextendsData{publicvoidData.1oad() {*dosomething*／}publicvoidload(){／*do)D.publicclassEmployeeextendsInfimplementsData publicvoidData.1oad() {／*dosomething*／)publicvoidinfo.1oad(){/*do)下列代碼正確的是哪項(xiàng)publicclassSessionimplementsRunnable,Clonable{publicvoidrun();publicObjectclone()}publicclassSessionextendsRunnable,Cloneable{publicvoidrun(){/*dosomething*/}publicObjectclone(){/*makea} classSessionimplementsRunnable,Clonable{pu)olicvoidrun(){/*dosomething*/}publicObjectclone(){/*makeacopy*/}}publicclassimplementsRunnable,implementsClonable{publicvoidrun(){/*dosomething*/}publicObjectclone(){/*makea}10 12131415A．父類的指向子類的實(shí)例是一種多態(tài)B.子類的指向子類的實(shí)例是一種多態(tài)c．接口的指向?qū)崿F(xiàn)該接口類的實(shí)例是一種多態(tài)D．抽象類的指向抽象類的實(shí)例是一種多態(tài)Java中方法綁定有哪些形式？（選兩項(xiàng)表達(dá)式"o"instanceofString返回的值是哪項(xiàng)10求平方根方法publicstaticdoublesqrtdoublea)可以傳遞的參數(shù)涉及類MyClass的方法簽名足public a，該方法可接收的實(shí)際參數(shù)的類型可以是哪些？（選兩項(xiàng)MyClassMyClassObjectclass publicvoidwrite(Stringcontent){System.out.println("Write"+content);}}classRubberPencilextendsPencil{publicvoiderase(Stringcontent){System.out.println("Erase"+content);}}Pencilpen=newRubberPencil();pen.write("o")；pen.erase("Write class publicvoidwrite(Stringcontent){System.out.println("Write"+content)；}}classRubberPencilextendsPencil{publicvoidwrite(Stringcontent){System.out.println("Rubber}publicvoiderase(Stringcontent){System.out.println("Erase"+content);}}Pencilpen=newRubberPencil()； RubberWrite 下列哪些方法是在編譯時(shí)刻綁定的？（選三項(xiàng)privatefinalprivateclassPencil publicvoidwrite(Stringcontent){System.out.println("Write",+content){}}classRubberPencilextendsPencil{publicvoidwrite(Stringcontent){System.out.println("Rubber}publicvoiderase(Stringcontent){System.out.println("Erase"+content);}} ((RubberPencil)pen).write("WriteRubberWriteo11．現(xiàn)有：classTestA publicvoid }publicclassTestBextends publicvoidstart() publicstaticv.idmain(string[] }}class {publicStringclassBextendsA{publicStringAa=newB()；aInterfaceclassAimplementsclassBextendsclassCextendspublicstaticvoid Bb=new／／inSertC0de}}7java.lang.ClassCaseExceptionAF F B class String return classCowboyextendsGuy Stringgreet() "orch!";}}class staticvoidmain Guyg=newGuyg2=newWranglerw2=newSystem.out.print(g.greet()+g2.greet()+w2} A.hihiB. Chihowdyouch!classClassA{}classClassBextendsClassA{)classClassCextendsClassA{)ClassAp0=newClassA();ClassBpl=newClassB()；ClassCp2=newClassC()；ClassAp3=newClassB()；ClassAp4=new B．p1=p2;D．p2=E．p1=F．p2 DBAB語(yǔ)言中異常的分類是哪項(xiàng)？A．運(yùn)行時(shí)異常和異常B．受檢異常和非受檢異常C．錯(cuò)誤和異常D．錯(cuò)誤和try...catch...finally結(jié)構(gòu)，描述正確的是哪項(xiàng)？（選兩項(xiàng)個(gè)有l(wèi)ly？B.C.NullPointerException

A.raiseB.thrownewC.throwD.throws的中，要求該方法必須拋出異常時(shí)使用哪個(gè)關(guān)鍵字classpublicstaticvoid System.out.print(Integer.parselnt}catch(RuntimeException System.out.print} (NumberFormatException 11．fortynumbervoid (Exception 1 15．1 void throws 1 system.out.print("late19．2.void throws thrownew}topGo(),則結(jié)果為A.lateB.C.latemiddleD.catchIateclassCalcpublicstaticvoidmain(String[]args)tryintx=Integer.parselnt("42a")//insertcodeSystem.out.print}}9."oops"選兩項(xiàng)}catch(IllegalArgumentExceptione)}catch(IllegalStateExceptionc)}catch(NumbelFormatExceptionn)}catch(ClassCastExceptionc)現(xiàn)有classFlowpublicstaticvoidmain(String[]args)try4 System.out.print("before")5 doRiskyThing( System.out.print("after")}catch(Exceptionfe)System.out.print("catch") 10 System.out.println("done") publicstaticvoiddoRiskyThing()throws//thiscodereturnsunlessitthrowsan可能會(huì)產(chǎn)生哪兩項(xiàng)結(jié)果?（選兩項(xiàng)beforebeforeafterbeforecatchbeforeafter現(xiàn)有classBirdspublicstaticvoidmain trythrownewException()}catch(Exceptione)trythrownewException() (Exceptione2) System.out.print("inner");}System.out.print("middle") System.out.print("outer") 13.innermiddleinnermiddleouterD.編譯失敗 Parser publicstaticvoidmain System.out.print Parser().getlnt("42")) catch(NumberFormatExceptionn)5 System.out.println("NFExc") intgetlnt(String throwsreturnInteger.parselnt(arg) 10.classUtilsintgetlnt(String return 13.紿果為classParserextends publicstaticvoidmain(String[] 3.try{System.out.print(newParser().getlnt("42"));}catch(Exceptione) intgetlnt(Stringarg)throws returnInteger.parselnt class intgetlnt(String {return }class pulolicstaticvoidmain(String[]args)／／addcode newPropeller2().topGo(); void ／／addcode middleGo()；}void ／／addcode System.out.println("latemiddle"); voidgo() ／／addcodehere?{thrownew 為使代碼通過(guò)編譯，需要在哪一行加入throws811581125811classParserextendsUtilspublicstaticvoidmain System.out.print(newParser().getlnt catch(Exceptione)System.out.println("Exc") intgetlnt(String throws returnInteger.parselnt(arg) 10.classUtilsintgetlnt return 13.ABCBDDCACPUB．CPu執(zhí)行的代碼創(chuàng)建線程的時(shí)候必須實(shí)現(xiàn)哪項(xiàng)接口runf)A.Thread 6．為了保證方法的線程安全，方法的時(shí)候必須用哪個(gè)修飾符B.C.D. classThread2implements voidrun() 3.System.out.print("go¨); publicstaticvoid Thread2t2=newThreadt=new} 程序員想要?jiǎng)?chuàng)建一個(gè)名為MyThread的類以便在mainThreadMyThread必須繼承Thread。MyThread必須實(shí)現(xiàn)ThreadMyThread必須覆蓋publicvoidrun() D．classThreadBothextendsThreaaimplementsRunnable 3.publicvoid publicstaticvoiclmain Threadtl=newThreadt2=newThread} A.hiB.hi

現(xiàn)有：t是一個(gè)合法的Thread對(duì)象的，并且t的合法run()publicvoid System.out.print} gogogogogogo1212

classThreadExceptimplements publicvoid thrownewpublicstaticvoid Thread intx=Integer.parselnt(argsThread.sleep}catch(Exception }}和命令行：javaThreadExceptCmainjava.lang.RuntimeException:exceptionclassOrder2implements publicvoid for(intx-o; (Exceptione) publicstaticvoid Threadt=newThread(newfor(int x<4； ／／insertcode 15行，最有可能產(chǎn)生輸出 (Exception 1414 classWaitingimplements boolean synchronizedvoid 6.System.out.print("1"); this.wait()；) (Exceptione) 8.System.out.print("2")； System.out.printtry{Thread.sleep(2000);}catch(Exception System.out.print publicstaticvoidmain {Waitingw=newnewThread(w)newThread(w)} 以下哪兩項(xiàng)是止確的？（選兩項(xiàng)l334l23D1342classOrderimplementsRunnablepublicvoidrun try{Thread.sleep(2000) }catch(ExceptionSystem.out.print("in")publicstaticvoidmain(String[] Threadt=newThread(newOrder())t.start()System.out.print("pre")try{t.join() }catch(Exception {System.out.print("post")可產(chǎn)生哪兩項(xiàng)結(jié)果?(選兩項(xiàng)preinpreinpostinpreprepostACCEBA下列哪項(xiàng)是Java在輸入流的read方法返回哪個(gè)值的時(shí)候表示結(jié)束01-為了從文本文件中逐行內(nèi)容，應(yīng)該使用哪個(gè)處理流對(duì)象D．以下關(guān)于File類的敘述，哪兩項(xiàng)正確？（選兩項(xiàng)A．Filejava．ioB．創(chuàng)建一個(gè)Filec．FileDFile刪除Fileimport staticvoidmain StringS=Scannersc=newScanner 7.System.out.print(sc.next() +""); xxyyFfjavaio．File型實(shí)例的合法frjava.io.FileReader型實(shí)例的合法brjava.io.BufferedReader型實(shí)例的合法 String//insertcodeSystem.out.println}

36while( while( while( while( while( while( intxreader.read()；閱讀器不是FileReader或者BufferedReader閱讀器可以是FileReader或者BufferedReaderc．閱讀器可以是FileReader類型，但不能是BufferedReader類型D．閱讀器可以是BufferedReader類型，但不能是FileReader類型Strings="writealinetoaA．wPrintWriter類型，也可以足BufferedWriterB.wPrintWriter類型，也不可以足BufferedWriterC.w可以是BufferedWriter類型，但不可以是PrintWriterDw以是PrintWriter類型，但不可以是BufferedWriter-fjava.io.File實(shí)例的frjava.io.FileReader實(shí)例的 哪兩個(gè)是合法的？（選兩項(xiàng)Filef2=newFileFileReaderfr2=newFileReaderFileReaderfr2=newFileReaderfr2=newBufferedReader =newBufferedReaderBufferedReaderbr2=newBufferedReader-fjava.io．File實(shí)例的合法fwjava.io.FileWriter實(shí)例的合法bwjava.io.BufferedWriter實(shí)例的合法PrintWriterprtWtr=newPrintWriterPrintWriter = PrintWriter(PrintWriterprtWtr=newBufferWriterbufWtr=newBufferedWritr(f)； rrrF.BufferWriterbufWtr=newBufferedWriterimport staticvoidmain intintfloatZ-7 System.out.format（"-%4d-"，System.out.format（"-%4.ld-} - -1234---42--1234---42--12345--’1410.classCarimplementsSerializableclassFordextendsCar如果試圖序列化一個(gè)Ford15classPetimplementsSerializableCollarc=new3.4.classCollarimplementsSerializable{5.collarPartcpl=newCollarPart("handle");6.CollarPartcp2=newCollarPart("clip");7．classCollarPartimplements如果Pet0D.E.121314 集合APISet實(shí)現(xiàn)了SetList接口的特點(diǎn)是哪項(xiàng)？下列哪些項(xiàng)是泛型的優(yōu)點(diǎn)？（選兩項(xiàng)）創(chuàng)建一個(gè)只能存放String的泛型ArrayListArrayList<int>al=newArrayList<String>al=newArrayListal=newArrayList<String>al=new staticvoidmain Listal=newArrayList()；System.out.println(al)；}}importclass staticListlist=newArrayList();publicstaticvoidmain list.add("a")；list.add("b");list.add(//insertcodeSystem.out.print}}9for tor tor()； for tor for(Object for(Object importclass publicstaticvoidmain(String ififif(t.addfor(String ：System.out.print onethreeonetwoonetwothreefouronethreetwo哪兩個(gè)是同步的？（選兩項(xiàng)list是一個(gè)合法的集合getCollection()返回一個(gè)合法集合的for(Object for(Object for(Object tori tor tor(); a-b-c-d-本具體類型允許空元素及基于索引的描述d；3描述b描述 3描述CC.3描述 4描述bD.4描述 2描述Cimportclass publicstaticvoidmain(String s=newTreeSet<String>();s.add(s.add(／／insertcodefor(Strings2: 9.System.out.print(s2+"");10． (SortedSet)s.tailSet(s.first()); (SortSet<String>)s.tailSet(s.first());7s2和s2和s2,s3和sl.s2.s3和importclass staticListlist-newArrayList():5.staticListgetList() returnlist; 7.publicstaticvoidmain(Strincj[] ／／insertcodeSystem.out.print} 9行插入哪一項(xiàng)將輸出for(charo:for(Object for(Objecto:for(Objecto:for(Objecto:importjava.util.*;3.Class 4.publicstaticvoidmain(String[]args) ／／insertcodeherec.put("X",} 5行，哪三行允許代碼編譯？(選三項(xiàng)Mapc=newHashMapc=newHashMapc=newSortedMapc=newArrayListc=newMaDc=newBBBADBD下列有關(guān)SwingSwing是Java基礎(chǔ)類(JFC)Swing是可用來(lái)構(gòu)建GUISwingAWT圖形TJava基礎(chǔ)類(JFC)SwingSwingGUI通常由哪幾類元素組成？（選三項(xiàng)GUIB．GUI組件D．GUI偵以下關(guān)于Swing容器敘述，哪項(xiàng)錯(cuò)誤？B．容器是組成GUI所必需的元素以下關(guān)于BorderLayout它可以對(duì)GUIjava.awtJTextField類提供的GUIGUI 當(dāng)執(zhí)行關(guān)閉窗口操作時(shí)，調(diào)用WindowsListener對(duì)象并將隱藏

當(dāng)執(zhí)行關(guān)閉窗口操作時(shí)，調(diào)用WincowsListener下列哪些是Swing容器的頂層容器？（選兩項(xiàng)界面設(shè)計(jì)中我們希望實(shí)現(xiàn)一個(gè)框，該框上有5個(gè)垂直方向 框改變 框應(yīng)該選擇哪B.BorderLayoutD.null(no組件的setSiz