java综合题2套摸底-笔试题

1、 floatchar byte（publicclassMyClass booleanint System.out.println(arguments); 错误，不能静态amethod方错误，main方法不正（importjava.awt.*; class Myclass importjava.awt.*;byte类型的大小是（ -128 -28-1-255 Amethod必须为String类 /*Thisisacomment*/ packageMyPackage; importjava.awt.*; classMyClassJava虚拟机分配不同的下面的代码在输入下面令行后会输出什么内容（）命

2、令行：java myprog good morning 下面哪个不是Java 的关键字或者保留字（ tion:2（多选） static int 错误，变量i没有被初始 publicclassQ argv)intanar=new 1Erroranar 被前没有初始 publicclassQpublic static void main(String argv)intanar=newint5; Error: 数组大小没有定Error: anar is referenced before it is classamethod();staticint5publicclassMineextendspub

3、licstaticvoidmain(Stringint ar=new int5; 50的序列会被输Errorar 在使用前要初始 inti=1; case case1:caseErrorMine 必须被Error one, inti=9; case case1:caseone,two,default, if(i) intint if(i=1|booleanif(b=b2) int if(i=1&|下不存在o.txt 文件，试图编译和运行下面代码会输出什么（importjava.io.*; publicclassMinepublic static void main(String argv)Mi

4、nem=newMine();publicint try return- returnNosuchfileNosuchfilefound,-（多选）（class publicvoidamethod(inti) Nosuchfilefound, ngfinally,-0voidamethod(inti)throwsException Exception Whichofthefollowingarevaliddefinitionsofanapplicationsmainmethod? （publicstaticvoidpublicstaticvoidmain(Stringargspublicstat

5、icvoidmain(StringargsWhichofthefollowingareJavakeywords?（Afterthedeclaration: （ charc=newpublicstaticvoidmain(Graphicsg)publicstaticbooleanmain(Stringargswhatisthevalueof Afterthedeclaration: （int therange of x-231to231-216to216-232toWhichidentifiersarevalid? ” cannotbealwaysnulluntilavalueis-216toc

6、annotbedetermined;itdependsonthe Ifyoucompileandexecuteanapplicationwiththefollowingcodeinitsmain() method: （Strings=newString(“Computer”); if( s = “Computer” ) System.out.println( “Equal A” );if(s.equals(“Computer”) ItwillnotcompilebecausetheStringclassdoesnotsupportthe=Itwillcompileand run,butnoth

7、ingis“EqualA”istheonlythingthatis“EqualB”istheonlythingthatisBoth“EqualA”and“EqualB”areGiventhevariabledeclarationsbelow: （ bytemyByte; intmyInt; longmyLong; charmyChar; floatdoubleWhichoneofthefollowingassignmentswouldneedanexplicmyInt=myInt=myByte=myInt=Giventhevariablesdefinedbelow: intone=1; int

8、two=charinitial= 2; booleanflag=WhichofthefollowingaremyFloat=myFloat=myDouble=if( oneif( one=twoif( one=twoif( flagIfval= 1inthecodebelow: （ switch(valcase1:System.out.print(“”); case2:case3:System.out.print(“Q”); case4:System.out.print(“R”); WhichvalueswouldbeA. B. switch(oneswitch(flagswitch(initialC.D. classstaticintx=10; static 说说HashMap与Hashtable有什么异同？ArrayListLinkedList有什么异同 设有关系EMP（ENO，ENAM