国外JAVA面试题翻译1

《国外JAVA面试题翻译1》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Question:Whatistransientvariable?Answer:Transientvariablecan''tbeserialize.ForexampleifavariableisdeclaredastransientinaSerializableclassandtheclassiswrittentoanObjectStream,thevalueofthevariablecan''tbewrittentothestreaminsteadwhentheclassisretrievedfromtheObjectStreamthevalueofthevariablebecome

2、snull.Question:NamethecontainerswhichusesBorderLayoutastheirdefaultlayout?Answer:ContainerswhichusesBorderLayoutastheirdefaultare:window,FrameandDialogclasses.Question:WhatdoyouunderstandbySynchronization?Answer:Synchronizationisaprocessofcontrollingtheaccessofsharedresourcesbythemultiplethreadsi

3、nsuchamannerthatonlyonethreadcanaccessoneresourceatatime.Innonsynchronizedmultithreadedapplication,itispossibleforonethreadtomodifyasharedobjectwhileanotherthreadisintheprocessofusingorupdatingtheobject''svalue.Synchronizationpreventssuchtypeofdatacorruption.E.g.Synchronizingafunction:publicsynch

4、ronizedvoidMethod1(){//Appropriatemethod-relatedcode.}E.g.Synchronizingablockofcodeinsideafunction:publicmyFunction(){synchronized(this){//Synchronizedcodehere.}}Question:WhatisCollectionAPI?Answer:TheCollectionAPIisasetofclassesandinterfacesthatsupportoperationoncollectionsofobjects.Theseclasses

5、andinterfacesaremoreflexible,morepowerful,andmoreregularthanthevectors,arrays,andhashtablesifeffectivelyreplaces.Exampleofclasses:HashSet,HashMap,ArrayList,LinkedList,TreeSetandTreeMap.Exampleofinterfaces:Collection,Set,ListandMap.Question:IsIteratoraClassorInterface?Whatisitsuse?Answer:Iteratori

6、saninterfacewhichisusedtostepthroughtheelementsofaCollection.Question:Whatissimilarities/differencebetweenanAbstractclassandInterface?Answer:Differencesareasfollows:Interfacesprovideaformofmultipleinheritance.Aclasscanextendonlyoneotherclass.Interfacesarelimitedtopublicmethodsandconstantswithnoim

7、plementation.Abstractclassescanhaveapartialimplementation,protectedparts,staticmethods,etc.AClassmayimplementseveralinterfaces.Butincaseofabstractclass,aclassmayextendonlyoneabstractclass.Interfacesareslowasitrequirese