java綜合題2套摸底-筆試題

1、 floatchar byte（publicclassMyClass booleanint System.out.println(arguments); 錯(cuò)誤，不能靜態(tài)amethod方錯(cuò)誤，main方法不正（importjava.awt.*; class Myclass importjava.awt.*;byte類(lèi)型的大小是（ -128 -28-1-255 Amethod必須為String類(lèi) /*Thisisacomment*/ packageMyPackage; importjava.awt.*; classMyClassJava虛擬機(jī)分配不同的下面的代碼在輸入下面令行后會(huì)輸出什么內(nèi)容（）命

2、令行：java myprog good morning 下面哪個(gè)不是Java 的關(guān)鍵字或者保留字（ tion:2（多選） static int 錯(cuò)誤，變量i沒(méi)有被初始 publicclassQ argv)intanar=new 1Erroranar 被前沒(méi)有初始 publicclassQpublic static void main(String argv)intanar=newint5; Error: 數(shù)組大小沒(méi)有定Error: anar is referenced before it is classamethod();staticint5publicclassMineextendspub

3、licstaticvoidmain(Stringint ar=new int5; 50的序列會(huì)被輸Errorar 在使用前要初始 inti=1; case case1:caseErrorMine 必須被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，試圖編譯和運(yùn)行下面代碼會(huì)輸出什么（importjava.io.*; publicclassMinepublic static void main(String argv)Mi

4、nem=newMine();publicint try return- returnNosuchfileNosuchfilefound,-（多選）（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 說(shuō)說(shuō)HashMap與Hashtable有什么異同？ArrayListLinkedList有什么異同 設(shè)有關(guān)系EMP（ENO，ENAM