南宁java培训java基础(易唐).docx

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1、JAVASE部分1、Choosethethreevalididentifiersfromthoselistedbelow.(Choosethree)?A.IDoLikeTheLongNameClassB.$byteC.constD._okE.3_case2、Whichofthefollowinglinesofcodewillcompilewithouterror(Choosetwo)?A.inti=0;if(i){System.out.println(“Hi”);}B.booleanb=true;booleanb2=true;if

2、(b==b2){System.out.println(“Sotrue”);}C.inti=1;intj=2;if(i==1

3、

4、j==2)System.out.println(“OK”);D.inti=1;intj=2;if(i==1&

5、j==2)System.out.println(“OK”);3、Whichtwodemonstratea"hasa"relationship(Choosetwo)?A.publicinterfacePerson{}publicclassEmployeeextendsPerson{}B.publici

6、nterfaceShape{}publicinterfaceRectandleextendsShape{}C.publicinterfaceColorable{}publicclassShapeimplementsColorable{}D.publicclassSpecies{}publicclassAnimal{privateSpeciesspecies;}E.interfaceComponent{}classContainerimplementsComponent{privateComponent[]children;}4、W

7、hatwillhappenwhenyouattempttocompileandrunthefollowingcode?publicclassStatic{static{intx=5;}staticintx,y;publicstaticvoidmain(Stringargs[]){x--;myMethod();System.out.println(x+y+++x);}publicstaticvoidmyMethod(){y=x+++++x;}}A.compiletimeerrorB.prints:1C.prints:2D.print

8、s:3E.prints:7F.prints:85、Whatisthecorrectorderingfortheimport,classandpackagedeclarationswhenfoundinasinglefile?A.package,import,classB.class,import,packageC.import,package,classD.package,class,import6、Whatwillhappenwhenyouattempttocompileandrunthefollowingcode.public

9、classPvf{staticbooleanPaddy;publicstaticvoidmain(Stringargv[]){System.out.println(Paddy);}}A.CompiletimeerrorB.compilationandoutputoffalseC.compilationandoutputoftrueD.compilationandoutputofnull7、Giventhefolowingclasseswhichofthefollowingwillcompilewithouterror?interf

10、aceIFace{}classCFaceimplementsIFace{}classBase{}publicclassObRefextendsBase{publicstaticvoidmain(Stringargv[]){ObRefob=newObRef();Baseb=newBase();Objecto1=newObject();IFaceo2=newCFace();}}A.o1=o2;B.b=ob;C.ob=b;D.o1=b;8、下面那几个函数是publicvoidmethod(){...}的重载函数?A）publicvoid

11、method(intm){...}B）publicintmethod(){...}C）publicvoidmethod2(){...}D）publicintmethod(intm，floatf){...}9、给出如下声明：Strings=“Exam