当前位置:考试网  > 试卷库  > 学历类  > 自考  > 自考专业(计算机网络)  > Java语言程序设计一  > 请写出Java语言中的事件处理机制。
试题预览

请写出Java语言中的事件处理机制。

查看答案
收藏
纠错
正确答案:

事件被直接送往产生这个事件的组件。

组件需要注册一个或多个侦听程序。

侦听程序的类中包含了事件处理程序。

用来接收和处理该事件。

答案解析:

暂无解析

你可能感兴趣的试题

以下标识符中,不是Java语言关键字的是()。

以下专门用于字符流处理的类是()。

以下供选择的概念中,属于面向对象语言重要概念和机制之一的是()。

某程序希望用FileFilter类的子类为打开文件对话框设置文件筛选条件。请写出设置此筛选条件要使用的类及相应的方法。

以下能作为表示线程优先级的数值,并且级别最低的是()。

热门试题 更多>
试题分类: 口语
练习次数:0次
试题分类: 写作
练习次数:0次
Intheearlieststagesofman'sdevelopmenthehadnomoreneedofmoneythananimalshave.Hewascontentwithverysimpleformsofshelter,madehisownroughtoolsandweaponsandcouldprovidefoodandclothingforhimselfandhisfamilyfromnaturalmaterialsaroundhim.Ashebecamemorecivilized,however,hebegantowantbettershelter,moreefficienttoolsandweapons,andmorecomfortableandmorelastingclothingthancouldbeprovidedbyhisownneighborhoodorbytheworkofhisownunskilledhands.Forthesethingshehadtoturntotheskilledpeoplesuchassmiths,leatherworkersorcarpenters.Itwasthenthatthequestionofpaymentarose. Atfirsthegotwhathewantedbyasimpleprocessofexchange.Thesmithwhohadnotthetimetolookafterlandorcattlewasgladtotakemeatorgrainfromthefarmerinexchangeforanaxeoraplough.Butasmoreandmoregoodswhichhadnofixedexchangevaluecameonthemarket,exchangebecametoocomplicatedtobesatisfactory.Anotherproblemarosewhenthosewhomadethingswantedtogetstocksofwoodorleather,oriron,buthadnothingtoofferinexchangeuntiltheirfinishedgoodswereready.Thusthedifficultiesofexchangeledbydegreestotheinventionofmoney.Insomecountrieseasilyhandledthingslikeseedsorshellsweregivenacertainvalueandthefarmer,insteadofpayingthesmithforanewaxebygivinghimsomemeatorgrain,gavehimsomanyshells.Ifthesmithhadanyshellsleftwhenhehadboughthisfood,hecouldgetstocksoftherawmaterialsofhistrade.Insomecountriesquitelargethingssuchascowsorcamelsorevenbigflatstoneswereusedfortrade.Later,piecesofmetal,bearingvaluesaccordingtotherarityofthemetalandthesizeofthepieces,orcoinswereused.Moneyasweknowithadarrived. 1.Exchangeofgoodsbecamedifficultbecause_________. Amanbecamemorecivilized Bsmithsbegantolookafterlandorcattleintheirsparetime Cmoreandmoregoodswhichhadnofixedexchangealuescametothemarker Dfarmershadn'tenoughgrainormeattoprovidefor skilledworkers 2.Moneywasnotuseduntil_______. Apaperwasinvented Bpeoplepracticedasimpleprocessofexchange CnothingcouldbeofferedinexchangeDtheexchangeofonethingforanotherbecametoocomplicated 3.Thebesttitleforthispassageis_____. AWhatismoney BWhataremoney'sfunctions. CTheimportanceofmoney DThebeginningofmoney
试题分类: 阅读
练习次数:12次
试题分类: 初级(口语)
练习次数:0次
扫一扫,手机做题