gd：惠普java类笔试题

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1、JAVA部分1.whicharerun-timeexceptions()a,d,f,g,hA.ArithmeticExceptionB.ClassNotFoundExceptionC.OutOfMemoryErrorD.ClassCastExceptionE.InterruptedExceptionF.IllegalArgumentExceptionG.IndexOutOfBoundsExceptionH.NullPointException2.WhichManclassproperlyrepresentsth

2、erelationship"ManhasabestfriendwhoisaDog"dA.classManextendsDog{}B.classManimplements{}C.classMan{privateBestFrienddog;}D.classMan{privateDogbestFriend;}E.classMan{privateDog;}F.classMan{privateBestFriend;}3Given:b,c,finterfaceJumper{publicvoidjump();}classAn

3、imal{}..classDogextendsAnimal{Tailtail;}classBeagleextendsDogimplementsJumper{publicvoidjump(){}}..classCatimplementsJumper(publicvoidjump(){}}Whicharetrue()MultiplechoicesA.Catis-aAminalB.Catis-aJumperC.Dogis-aAnimalD.Dogis-aJumperE.Cathas-aAnimalF.Beagleha

4、s-aTailH.Beaglehas-aJumper4Given:a,b,c,d,einterfaceA{publicintgetValue();}classBimplementsA{publicintgetValue(){return1;}}classCextendsB{15:insertcodeinhere}Whichthreecodefrgments,insertedindividaullyatline15,makeuse(多选）A:publicvoidadd(Cc){c.getValue();}B:pu

5、blicvoidadd(Bb){b.getValue();}C:publicvoidadd(Aa){a.getValue();}D:publicvoidadd(Aa,Bb){a.getValue();}E:publicvoidadd(Cc1,Cc2){c1.getValue();}5.丢失6.GivenB[2P]Stringtest="Thisistest";String[]tokens=test.split("￥s");System.out.println(tokens.length);whtaisthere

6、sult()A.0B.1C.4D.CompilationfailsE.Anexceptionisthrownatruntime7.Given:CclassWow{publicstaticvoidgo(shortn){System.out.print("short");}publicstaticvoidgo(Shortn){System.out.print("SHORT");}publicstaticvoidgo(Longn){System.out.print("LONG");}publicstaticvoidm

7、ain(String[]args){Shortn=6;intm=7;go(n);go(m);//这一句编译出错}}Whichisthresult?()[2P]A.shortLONGB.SHORTLONGC.CompilationfailsD.Anexceptionisthrownatruntime8.publicclassNamedCounter{privatefinalStringname;privateintcount;publicNamedCounter(Stringname){this.name=nam

8、e;}publicStringgetName(){returnname;}publicvoidincrement(){count++;}publicintgetCount(){returncount;}publicvoidreset(){count=0;}}Whichchangesshouldbemadetoadaptthisclasstobeusedsavelybythreads?(