java綜合測試題答案

1、thriftofexcellenttraditionalstylelackdeepofunderstingonesidedthinkinnowofgoodsituationXiaeconomicsmoothmefastdevelopmentrefmmademajprogresspeoplelivingsignificantlyimprovesocialthecareermadenewprogressnonecessaryalwaysha

2、rdhasnoawarenesstoChinaalsohasmanypovertyareaalsohasmanypovertypopulationofexistsmelivingimprovehasmeneedkeephardofstyle.Threeisnotstrictlyhonest.Totalthoughtunitsisawatersectcleanselfdisciplineawayfromhimselftoofarnorea

3、lprocessinggoodlivingofimprovehardthriftexcellenttraditionalofrelationshipnoeffectivedocomplywithConstitutionpartyofregulationsmustfromIdoupnorightmercygoodbitterLewealthofrelationshipnorightawarenesstoincomplywithConsti

4、tutionpartyofregulationsaspectseveryonehasaccountability.Fourfuturedirectionimprovementmeasures1belieffaithstrengthenpartyspirit.Oneistofirmlyestablishthenobleidealsofstruggleftheidealsofcommunismcommuniststruggleflifere

5、adytosacrificeeverythingfthepartythepeople.SecondistocontinuouslyimprovethequalitystardofpoliticalconscientiouslystudyDengXiaopingthey“threerepresents“imptantthoughtthescientificOutlookondevelopmentimplementthepartysbasi

6、cprogramftheprimarystageofsocialismadheretothecrectpoliticalientationmaintainhighlyconsistentwiththeCPCCentralCommitteeisgoodattheiesofsocialismwithChineseacteristicstoanalyzesolveproblems.Thirdstrengtheningthepartyspiri

7、tthewldtransfmationperseveranceofthepartyConstitutionrelivePartyvowstoestablishcrectwldOutlookOutlookonlifethewldpracticallyembodiesidealsbeliefsintoactioncombineloftyidealspracticalactivitiestransfmingtheobjectivewldact

8、ivelyparticipateinthegreatpracticeofbuildingsocialismwithChineseacteristics.2keepthepurposeinconceptchangingthestyleofwk.Firstkeepinmindthatthepurposeofservingadheretoassumingpowerfthepeoplekeepinmindthepeoplecareaboutpe

9、oplethejoyssrowsofthemasses...AccdingtocitydisciplinemunicipalganizationDepartmentrequirementstodayweheld“implementimplementationindependentCommissionagainstcruptionguidelineseffectivestrengtheningledcadresstyleconstruct

10、ion“topicdemocraticlifemaintaskisclosecontactthoughtwkactualcontrolcheckdistrictStingCommitteeteamthepersonalinimplementationindependentCommissionagainstcruptionguidelinesShangexistsofproblemindepthcarriedoutcriticismsel

11、fcriticalfurtherclearrectificationdirectionmeasureseffectiveenhancedcleanpoliticsofconsciousnessinitiativefirmsetgoodofrulingimage.Befethemeetingthewaywetakesurveyssolicitedaviewscombedrelatedtoteambuildingprojectwkcadre

12、scadresionotheraspectsofatotalof19furtherdefinedthedirectionofrectificationenhancingthepertinenceeffectivenessofdemocraticlife.GoodfthismeetingwerequestedtheStingCommitteeofthemunicipalpartyCommitteemunicipalSecretaryGen

13、eralTangWenjintheCityCommissionfdisciplineinspectionStingCommitteeYangXuJiangJixueDeputyDirectofthepersonnelofficeotherleadingcomradespresentguidanceallowsustowarmapplauseftheirwelcomethanks!BelowIfirstDistrictCommitteem

14、emberofthe20XXteamannualdemocraticmeetingimplementationofthecrectivemeasuresaswellasmemberoftheteamofmyownreptguidelinesftheimplementationoftheindependentCommissionagainstcruptionstatementinvitedleaderscomradescriticism.

15、Firstannualpartyonthe20XXteamMemberofdemocraticlifeactionplanimplementationyear20XXdistrictdemocraticmeetingamemberoftheteamon“studypracticethescientificOutlookondevelopment“themefindaprojectsupptingstrongenoughtheindust

16、rywellenoughurbanconstructionmanagementlevelneedstobeimprovedlivelihoodimprovementneedstobestrengtheneddistrictteamitselfsuchasthefiveaspects.Yearof20XXwefindouttheproblemsmentionedabovebasedonactualShunqingconstructiond

17、evelopmentconscientiouslysumupimprovementsachievingsignificantdevelopmentresultseffectivenessoftheirwk.(A)highlighttheprojecthlemaintainhighgrowthofinvestment.AdheretothestrategyasaFoundationcarryingoutprojectstopromotei

18、ncreasedstaminaimptant.Oneistoincreasetheintensityofprojectstowards.Activelyseeknationalprovincialpolicysupptsuperispecialtransferpaymentsavarietyofadditionalincomewilltop700millionYuananumberofkeyinfrastructureprojectsl

19、ivelihoodprojectsindustrialprojectsintothecage.Secondincreasingtheprojectattracts.Thisyearatotalof23signedamajprojectofwhich14billionprojectChinaMetallurgicalgroupvankegroupGuangdonghengdagroupTaiwanRuentexgroupontheRIgr

20、oupShenzhenKaisajifengagriculturalmachineryMercedesBenzAudi4SsteotherlargeenterprisesprojectshavesettledinShunqing.Thirdstrengthenprojectconstruction.Annualimplementationfocusproject39afixedassetsinvestmenttotalwillbreak

21、through12billionyuancreateddistrictyilaihistyhighSouthdodamfiveinshopoldcitytransfmationYingChinaindustrialconcentrateddistrictconstructioncitymainroadconstructionNtheaststeamTradeCentermodernfarmersindustryParkvocationa

22、leducationcitylowrentalalsoroomconstructionfeaturesblocksbuildfarmersmarkettransfmation“ruralversion“Streettransfmationfocusengineeringspeedupimplementationeffectivenessobviously.ExpectedtobeachievedthisyearareawideGDP17

23、billionCBCACCADDDAB1.String、StringBuffer以及StringBuilder的區(qū)別簡要的說，String類型和StringBuffer類型的主要性能區(qū)別其實(shí)在于String是不可變的對象因此在每次對String類型進(jìn)行改變的時(shí)候其實(shí)都等同于生成了一個(gè)新的String對象，然后將指針指向新的String對象，所以經(jīng)常改變內(nèi)容的字符串最好不要用String，因?yàn)槊看紊蓪ο蠖紩ο到y(tǒng)性能產(chǎn)生影響，特別當(dāng)內(nèi)存

24、中無引用對象多了以后，JVM的GC就會開始工作，那速度是一定會相當(dāng)慢的。每個(gè)字符串緩沖區(qū)都有一定的容量。只要字符串緩沖區(qū)所包含的字符序列的長度沒有超出此容量，就無需分配新的內(nèi)部緩沖區(qū)數(shù)組。如果內(nèi)部緩沖區(qū)溢出，則此容量自動增大。從JDK5.0開始，為該類增添了一個(gè)單個(gè)線程使用的等價(jià)類，即StringBuilder。與該類相比，通常應(yīng)該優(yōu)先使用StringBuilder類，因?yàn)樗С炙邢嗤牟僮?，但由于它不?zhí)行同步，所以速度更快。但是如果

25、將StringBuilder的實(shí)例用于多個(gè)線程是不安全的。需要這樣的同步，則建議使用StringBuffer2.說說ArrayList和LinkedList、HashMap和Hashtable的區(qū)別ArrayList采用的是數(shù)組形式來保存對象的，這種方式將對象放在連續(xù)的位置中，所以最大的缺點(diǎn)就是插入刪除時(shí)非常麻煩LinkedList采用的將對象存放在獨(dú)立的空間中，而且在每個(gè)空間中還保存下一個(gè)鏈接的索引但是缺點(diǎn)就是查找非常麻煩要叢第一個(gè)索

26、引開始Hashtable和HashMap類有三個(gè)重要的不同之處。第一個(gè)不同主要是歷史原因。Hashtable是基于陳舊的Dictionary類的，HashMap是Java1.2引進(jìn)的Map接口的一個(gè)實(shí)現(xiàn)。也許最重要的不同是Hashtable的方法是同步的，而HashMap的方法不是。這就意味著，雖然你可以不用采取任何特殊的行為就可以在一個(gè)多線程的應(yīng)用程序中用一個(gè)Hashtable，但你必須同樣地為一個(gè)HashMap提供外同步。一個(gè)方便的

27、方法就是利用Collections類的靜態(tài)的synchronizedMap()方法，它創(chuàng)建一個(gè)線程安全的Map對象，并把它作為一個(gè)封裝的對象來返回。這個(gè)對象的方法可以讓你同步訪問潛在的HashMap。這么做的結(jié)果就是當(dāng)你不需要同步時(shí)，你不能切斷Hashtable中的同步（比如在一個(gè)單線程的應(yīng)用程序中），而且同步增加了很多處理費(fèi)用。第三點(diǎn)不同是，只有HashMap可以讓你將空值作為一個(gè)表的條目的key或value。HashMap中只有一條

28、記錄可以是一個(gè)空的key，但任意數(shù)量的條目可以是空的value。這就是說，如果在表中沒有發(fā)現(xiàn)搜索鍵，或者如果發(fā)現(xiàn)了搜索鍵，但它是一個(gè)空的值，那么get()將返回null。如果有必要，用containKey()方法來區(qū)別這兩種情況。z3.如何創(chuàng)建并啟動一個(gè)新線程線程的狀態(tài)有哪些？說一說他們之間是如何轉(zhuǎn)化的？thriftofexcellenttraditionalstylelackdeepofunderstingonesidedthinki

29、nnowofgoodsituationXiaeconomicsmoothmefastdevelopmentrefmmademajprogresspeoplelivingsignificantlyimprovesocialthecareermadenewprogressnonecessaryalwayshardhasnoawarenesstoChinaalsohasmanypovertyareaalsohasmanypovertypopu

30、lationofexistsmelivingimprovehasmeneedkeephardofstyle.Threeisnotstrictlyhonest.Totalthoughtunitsisawatersectcleanselfdisciplineawayfromhimselftoofarnorealprocessinggoodlivingofimprovehardthriftexcellenttraditionalofrelat

31、ionshipnoeffectivedocomplywithConstitutionpartyofregulationsmustfromIdoupnorightmercygoodbitterLewealthofrelationshipnorightawarenesstoincomplywithConstitutionpartyofregulationsaspectseveryonehasaccountability.Fourfuture

32、directionimprovementmeasures1belieffaithstrengthenpartyspirit.Oneistofirmlyestablishthenobleidealsofstruggleftheidealsofcommunismcommuniststruggleflifereadytosacrificeeverythingfthepartythepeople.Secondistocontinuouslyim

33、provethequalitystardofpoliticalconscientiouslystudyDengXiaopingthey“threerepresents“imptantthoughtthescientificOutlookondevelopmentimplementthepartysbasicprogramftheprimarystageofsocialismadheretothecrectpoliticalientati

34、onmaintainhighlyconsistentwiththeCPCCentralCommitteeisgoodattheiesofsocialismwithChineseacteristicstoanalyzesolveproblems.ThirdstrengtheningthepartyspiritthewldtransfmationperseveranceofthepartyConstitutionrelivePartyvow

35、stoestablishcrectwldOutlookOutlookonlifethewldpracticallyembodiesidealsbeliefsintoactioncombineloftyidealspracticalactivitiestransfmingtheobjectivewldactivelyparticipateinthegreatpracticeofbuildingsocialismwithChineseact

36、eristics.2keepthepurposeinconceptchangingthestyleofwk.Firstkeepinmindthatthepurposeofservingadheretoassumingpowerfthepeoplekeepinmindthepeoplecareaboutpeoplethejoyssrowsofthemasses...Accdingtocitydisciplinemunicipalganiz

37、ationDepartmentrequirementstodayweheld“implementimplementationindependentCommissionagainstcruptionguidelineseffectivestrengtheningledcadresstyleconstruction“topicdemocraticlifemaintaskisclosecontactthoughtwkactualcontrol

38、checkdistrictStingCommitteeteamthepersonalinimplementationindependentCommissionagainstcruptionguidelinesShangexistsofproblemindepthcarriedoutcriticismselfcriticalfurtherclearrectificationdirectionmeasureseffectiveenhance

39、dcleanpoliticsofconsciousnessinitiativefirmsetgoodofrulingimage.Befethemeetingthewaywetakesurveyssolicitedaviewscombedrelatedtoteambuildingprojectwkcadrescadresionotheraspectsofatotalof19furtherdefinedthedirectionofrecti

40、ficationenhancingthepertinenceeffectivenessofdemocraticlife.GoodfthismeetingwerequestedtheStingCommitteeofthemunicipalpartyCommitteemunicipalSecretaryGeneralTangWenjintheCityCommissionfdisciplineinspectionStingCommitteeY

41、angXuJiangJixueDeputyDirectofthepersonnelofficeotherleadingcomradespresentguidanceallowsustowarmapplauseftheirwelcomethanks!BelowIfirstDistrictCommitteememberofthe20XXteamannualdemocraticmeetingimplementationofthecrectiv

42、emeasuresaswellasmemberoftheteamofmyownreptguidelinesftheimplementationoftheindependentCommissionagainstcruptionstatementinvitedleaderscomradescriticism.Firstannualpartyonthe20XXteamMemberofdemocraticlifeactionplanimplem

43、entationyear20XXdistrictdemocraticmeetingamemberoftheteamon“studypracticethescientificOutlookondevelopment“themefindaprojectsupptingstrongenoughtheindustrywellenoughurbanconstructionmanagementlevelneedstobeimprovedliveli

44、hoodimprovementneedstobestrengtheneddistrictteamitselfsuchasthefiveaspects.Yearof20XXwefindouttheproblemsmentionedabovebasedonactualShunqingconstructiondevelopmentconscientiouslysumupimprovementsachievingsignificantdevel

45、opmentresultseffectivenessoftheirwk.(A)highlighttheprojecthlemaintainhighgrowthofinvestment.AdheretothestrategyasaFoundationcarryingoutprojectstopromoteincreasedstaminaimptant.Oneistoincreasetheintensityofprojectstowards

46、.Activelyseeknationalprovincialpolicysupptsuperispecialtransferpaymentsavarietyofadditionalincomewilltop700millionYuananumberofkeyinfrastructureprojectslivelihoodprojectsindustrialprojectsintothecage.Secondincreasingthep

47、rojectattracts.Thisyearatotalof23signedamajprojectofwhich14billionprojectChinaMetallurgicalgroupvankegroupGuangdonghengdagroupTaiwanRuentexgroupontheRIgroupShenzhenKaisajifengagriculturalmachineryMercedesBenzAudi4Ssteoth

48、erlargeenterprisesprojectshavesettledinShunqing.Thirdstrengthenprojectconstruction.Annualimplementationfocusproject39afixedassetsinvestmenttotalwillbreakthrough12billionyuancreateddistrictyilaihistyhighSouthdodamfiveinsh

49、opoldcitytransfmationYingChinaindustrialconcentrateddistrictconstructioncitymainroadconstructionNtheaststeamTradeCentermodernfarmersindustryParkvocationaleducationcitylowrentalalsoroomconstructionfeaturesblocksbuildfarme

50、rsmarkettransfmation“ruralversion“Streettransfmationfocusengineeringspeedupimplementationeffectivenessobviously.ExpectedtobeachievedthisyearareawideGDP17billion調(diào)用了stop方法4.什么情況下會出現(xiàn)NullPointException，此異常需要顯式trycatch嗎？為什么？再

51、舉幾個(gè)同一性質(zhì)的常見的異常。Hibernate中的save等方法以及Spring的Templete模板的大部分API，請問這些方法拋異常嗎？我們是否需要trycatch，說說這樣設(shè)計(jì)的好處。1）一個(gè)東西是null就是說只有其名沒有實(shí)值內(nèi)容也沒分配內(nèi)存當(dāng)你要去取他的長度對他進(jìn)行操作當(dāng)然就會NullPointExceptionNullPointerException這個(gè)東西換一個(gè)角度來看，沒準(zhǔn)是好處也不一定。可以說，NullPointerE

52、xception本身也是JAVA安全機(jī)制的一部分。有UNIX寫C和C的經(jīng)驗(yàn)的可能都知道，空指針會導(dǎo)致什么問題：經(jīng)常會導(dǎo)致程序的崩潰。而JAVA在這點(diǎn)進(jìn)行了改善，JAVA為了保證程序的強(qiáng)壯，總是會對對象的引用進(jìn)行檢查。所以不再出險(xiǎn)CC中的空指針錯(cuò)誤，而僅僅是一個(gè)運(yùn)行級別的異?！癗ullPointerException”。從這點(diǎn)上說，算是JAVA的一個(gè)好處吧。2）NullPointException不需要我們顯式trycatch因?yàn)樗鼘儆赗

53、unTimeException，類似的還有ArithmeticException，IndexOutOfBoundsException等；3）Hibernate、Spring都會拋出異常，但是基本都被封裝成了RunTimeException，即我們可以不顯式地去處理這些異常，這樣設(shè)計(jì)我們就不需要關(guān)心底層到底是怎么實(shí)現(xiàn)的，我們要處理那些異常，我們只要知道調(diào)用就可以了。5.談?wù)勀銓ervlet的認(rèn)識，請盡量描述的詳細(xì)一些。servlet是一

54、中服務(wù)器端的編程語言，是j2ee中比較關(guān)鍵的組成部分。servlet技術(shù)的推出，擴(kuò)展了java語言在服務(wù)器端開發(fā)的功能，鞏固了Java語言在服務(wù)器端開發(fā)中的地位，而且現(xiàn)在使用非常廣泛的jsp技術(shù)也是居于servlet的原理，jspjavabeanservlet成為實(shí)現(xiàn)MVC模式的一中有效選擇。servlet在本質(zhì)上就是java類，編寫servlet需要遵循java的基本語法，但是與一般java類所不同的是，servlet是只能運(yùn)行在服務(wù)

55、器端的Java類，而且必須遵循特殊的規(guī)范，在運(yùn)行的過程中有自己的生命周期，這些特性都是servlet所都有的。另外，servlet是和緊密聯(lián)系的，所以使用servlet幾乎可以處理各個(gè)方面的內(nèi)容，這也正是servlet受到廣大開發(fā)人員青睞的最大原因。工作原理：servlet需要在特定的容器中才能運(yùn)行，在這里所說的容器，即servlet運(yùn)行時(shí)所需要的運(yùn)行環(huán)境。一般情況下，市場上常見的javawebserver都可以支持servlet，如T