Java东华理工大学试卷B.doc

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1、东华理工大学2012—2013学年第1学期考试试卷JAVA程序设计课程闭卷课程类别：考查B题号一二三四五六七八九总分分数评卷人1选择题（共35分）1.Whatissuffix(后缀)ofJavaclassfile？（）?A、.javaB、.classC、.txtD、.ext2.WhichcommandcanrunJavaclassfile?()?A、editB、dirC、javaD、javac3.Whichidentifiesisillegal()?A、$_123B、中国C、you_can_alDsome++name4.Whichconversion(转换)isleg

2、al()?A、intx=1000.1;B、intx=’a’;C、shortx=10000;D、intx=12L;5．classexample{publicstaticvoidmain(Stringargs[]){booleanb;b=(4>3)&&(3<2);System.out.print("b="+b);b=false

3、

4、true;System.out.println("b="+b);}}Whatistheresult?（）A、b=falseb=trueB、b=trueb=falseC、b=trueb=trueD、b=falseb=false6.classexam

5、ple{publicstaticvoidmain(Stringargs[]){int[]a={1,2,3,4,5};inti=3;a[i--]=a[i--]+2;System.out.println(a[i++]);}}Whatistheresult?（）A,4B,5C3,D,27．classgggg{Stringtr=newString("hello");char[]th={'a','b','n'};publicvoidchange(Stringstr,charch[]){str="tcwtok";ch[0]='z';}publicstaticvoidmain(St

6、ringargs[]){ggggex=newgggg();ex.change(ex.tr,ex.th);System.out.print(ex.tr+"and");System.out.print(ex.th);}}Whatistheresult?（）AhelloandabcBhelloandokChelloandzbnDtcwtok8.Setx=1,y=2,z=3,expressiony-=z--%++x;whatisresult()A1B3.5C4D59.Whatisresult?（）classexample{staticintb=8;inta=4;publics

7、taticvoidmain(Stringargs[]){newexample().b++;newexample().a+=2;System.out.println(newexample().a);}}A6B7C4D510．1.classX{2.publicstaticvoidmain(Stringargs[]){3.Strings1=newString(“true”);4.Booleanb1=newBoolean(true);5.if(!s1.equals(b1)){6.System.out.println(“equal”);}}}Atheprogramrunsand

8、printsnothingBtheprogramrunsandprints“equal”CAnerroratline5causescompilationtofailDTheprogramrunsbutabortswithanexception11.1.interfaceA{2.voiddisplay(){};3.voidshow();4.}5.classBimplementA{6.voidshow(){}7.publicdisplay(){}publicstaticvoidmain(Stringargs[]){}}Whichlinesareincorrectwhent

9、hecodeiscompiled?A57B256C568D5612．classA{inta=2;voidshow(){System.out.println(“s”);}}classBextendsA{inta=3;voidshow(){System.out.println(“v”);}}classtest{publicstaticvoidmain(Stringargs[]){Ag=newB();g.show();}}Whatisresult?()AsBnoresultCvDsv13．whatisresult()classA{publicstaticv