So from reading some of the articles，themessageigotoutofitwasbeingabletomodifyfieldsandsetvaluestoclassesinrealtimewithoutrecompoutrecompilecorecomporecompompilecleretrecled
soisitpossibletodothisto3rdpartyjavalibrarycreatedclasseswhichnosourcecodeisavailable/isitpossibletousereflectiontontomodifyclayclablable
inwhatotherscenariosisreflectioncommonlyused？
iamtryingtounderstandhowreflectioncanbeapplicable。
解决方案
anytime you ' redealingwithastringatruntimeandwanttotreatpartofthatstringasanidentifierinthelanguage。
remoteprocedurecalling---treatpartofamessagereceivedoverthenetworkasamethodname。
序列化和序列化--convertfieldnamestostringsoyoucanwritetheobject ' sfieldstoastreamandlaterconvertitbackinter
对象关系映射----maintainarelationshipbetweenfieldsinanobjectandcolumnsinadatabase。
interfaceswithdynamicallytypedscriptinglanguages-- turnastringvalueproducedbyascriptinglanguageintoareferencetoafieldormethorm
itcanalsobeusedtoallowlanguagefeaturestobeemulatedinthelanguage。
considerthecommandlinejavacom.example.myclasswhichturnsastringintoaclassname.this doesn ' trequirereflection， becausethejavaexecutablecanturna.classfileintocode，butwithouldnotbeabletowritejavacom.example.wrapper code
class Wrapper {
publicstaticvoidmain (string . argv ) throws Exception { )。
//dosomeinitializationorotherwork
class delegate=class.forname (argv [0]；
method main=delegate.get method (' main '，string ) ).class )；
main.apply(null，Arrays.aslist ) argv ).subList(1) 1，argv.length ).toarray ) argv )；
}
}