00000007.htm

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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;zixia&nbsp;(独守空房の比特仙子),&nbsp;信区:&nbsp;Java&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;来自&nbsp;JAVA&nbsp;的传说4.1&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Tue&nbsp;May&nbsp;12&nbsp;21:14:33&nbsp;1998)&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;来&nbsp;自&nbsp;Java的&nbsp;传&nbsp;说&nbsp;(4)&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;作者&nbsp;：&nbsp;清&nbsp;华&nbsp;大&nbsp;学&nbsp;：&nbsp;王&nbsp;克&nbsp;宏&nbsp;教&nbsp;授&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;教&nbsp;学&nbsp;纲&nbsp;要&nbsp;<BR>&nbsp;<BR>上&nbsp;一&nbsp;次&nbsp;已&nbsp;经&nbsp;创&nbsp;建&nbsp;了&nbsp;第&nbsp;一&nbsp;个&nbsp;窗&nbsp;口&nbsp;程&nbsp;序&nbsp;，&nbsp;这&nbsp;次&nbsp;再&nbsp;前&nbsp;进&nbsp;一&nbsp;小&nbsp;步&nbsp;。&nbsp;&nbsp;<BR>&nbsp;前&nbsp;进&nbsp;一&nbsp;小&nbsp;步&nbsp;<BR>&nbsp;从&nbsp;零&nbsp;开&nbsp;始&nbsp;，&nbsp;创&nbsp;建&nbsp;了&nbsp;第&nbsp;一&nbsp;个&nbsp;窗&nbsp;口&nbsp;程&nbsp;序&nbsp;，&nbsp;是&nbsp;不&nbsp;是&nbsp;有&nbsp;吃&nbsp;了&nbsp;第&nbsp;一&nbsp;只&nbsp;<BR>螃&nbsp;蟹&nbsp;的&nbsp;感&nbsp;觉&nbsp;，&nbsp;或&nbsp;者&nbsp;是&nbsp;觉&nbsp;得&nbsp;没&nbsp;什&nbsp;么&nbsp;难&nbsp;的&nbsp;？&nbsp;下&nbsp;面&nbsp;我&nbsp;们&nbsp;就&nbsp;开&nbsp;始&nbsp;向&nbsp;前&nbsp;进&nbsp;<BR>，&nbsp;改&nbsp;进&nbsp;一&nbsp;下&nbsp;程&nbsp;序&nbsp;。&nbsp;&nbsp;<BR>图&nbsp;13.4&nbsp;程&nbsp;序&nbsp;13.2&nbsp;的&nbsp;执&nbsp;行&nbsp;结&nbsp;果&nbsp;（&nbsp;1&nbsp;）&nbsp;<BR>图&nbsp;13.5&nbsp;程&nbsp;序&nbsp;13.2&nbsp;的&nbsp;执&nbsp;行&nbsp;结&nbsp;果&nbsp;（&nbsp;2&nbsp;）&nbsp;&nbsp;<BR>&nbsp;图&nbsp;13.4&nbsp;是&nbsp;改&nbsp;进&nbsp;后&nbsp;的&nbsp;程&nbsp;序&nbsp;窗&nbsp;口&nbsp;，&nbsp;当&nbsp;我&nbsp;们&nbsp;用&nbsp;鼠&nbsp;标&nbsp;单&nbsp;击&nbsp;“&nbsp;增&nbsp;加&nbsp;一&nbsp;<BR>句&nbsp;话&nbsp;”&nbsp;这&nbsp;个&nbsp;按&nbsp;钮&nbsp;以&nbsp;后&nbsp;，&nbsp;窗&nbsp;口&nbsp;就&nbsp;变&nbsp;成&nbsp;了&nbsp;图&nbsp;13.5&nbsp;的&nbsp;样&nbsp;子&nbsp;了&nbsp;。&nbsp;如&nbsp;果&nbsp;再&nbsp;<BR>用&nbsp;鼠&nbsp;标&nbsp;单&nbsp;击&nbsp;这&nbsp;个&nbsp;按&nbsp;钮&nbsp;，&nbsp;每&nbsp;单&nbsp;击&nbsp;一&nbsp;次&nbsp;，&nbsp;窗&nbsp;口&nbsp;里&nbsp;就&nbsp;会&nbsp;添&nbsp;加&nbsp;一&nbsp;句&nbsp;话&nbsp;：&nbsp;<BR>“&nbsp;这&nbsp;是&nbsp;白&nbsp;手&nbsp;起&nbsp;家&nbsp;制&nbsp;造&nbsp;的&nbsp;第&nbsp;一&nbsp;个&nbsp;窗&nbsp;口&nbsp;程&nbsp;序&nbsp;”&nbsp;。&nbsp;&nbsp;<BR>&nbsp;程&nbsp;序&nbsp;13.2&nbsp;<BR>import&nbsp;java.awt.*;&nbsp;<BR>&nbsp;//&nbsp;通&nbsp;配&nbsp;符&nbsp;*&nbsp;表&nbsp;示&nbsp;把&nbsp;所&nbsp;有&nbsp;前&nbsp;9&nbsp;个&nbsp;字&nbsp;符&nbsp;为&nbsp;“&nbsp;java.awt.&nbsp;”&nbsp;的&nbsp;类&nbsp;都&nbsp;<BR>import&nbsp;进&nbsp;来&nbsp;<BR>public&nbsp;class&nbsp;window2&nbsp;extends&nbsp;java.applet.Applet&nbsp;<BR>{&nbsp;<BR>&nbsp;public&nbsp;void&nbsp;init(&nbsp;)&nbsp;{&nbsp;<BR>&nbsp;resize(220,100);&nbsp;<BR>&nbsp;add(new&nbsp;Label(String.valueOf(&quot;&nbsp;这&nbsp;是&nbsp;白&nbsp;手&nbsp;起&nbsp;家&nbsp;制&nbsp;造&nbsp;的&nbsp;第&nbsp;一&nbsp;个&nbsp;窗&nbsp;口&nbsp;<BR>程&nbsp;序&nbsp;&quot;)));&nbsp;<BR>&nbsp;add&nbsp;(new&nbsp;Button(&quot;&nbsp;增&nbsp;加&nbsp;一&nbsp;句&nbsp;话&nbsp;&quot;));&nbsp;<BR>&nbsp;&nbsp;&nbsp;}&nbsp;<BR>&nbsp;public&nbsp;boolean&nbsp;action(Event&nbsp;evnt,Object&nbsp;Buttonname)&nbsp;<BR>&nbsp;{&nbsp;<BR>&nbsp;if&nbsp;(evnt.target&nbsp;instanceof&nbsp;Button)&nbsp;<BR>&nbsp;&nbsp;{&nbsp;<BR>&nbsp;&nbsp;add(new&nbsp;Label(&quot;&nbsp;这&nbsp;是&nbsp;白&nbsp;手&nbsp;起&nbsp;家&nbsp;制&nbsp;造&nbsp;的&nbsp;第&nbsp;一&nbsp;个&nbsp;窗&nbsp;口&nbsp;程&nbsp;序&nbsp;&quot;));&nbsp;<BR>&nbsp;&nbsp;layout(&nbsp;);&nbsp;<BR>&nbsp;&nbsp;return&nbsp;true;&nbsp;<BR>&nbsp;}&nbsp;<BR>&nbsp;else&nbsp;<BR>&nbsp;&nbsp;return&nbsp;false;&nbsp;<BR>&nbsp;}&nbsp;<BR>}&nbsp;<BR>&nbsp;观&nbsp;察&nbsp;程&nbsp;序&nbsp;13.2&nbsp;，&nbsp;可&nbsp;以&nbsp;看&nbsp;到&nbsp;里&nbsp;面&nbsp;除&nbsp;了&nbsp;用&nbsp;到&nbsp;类&nbsp;Label&nbsp;以&nbsp;外&nbsp;，&nbsp;还&nbsp;用&nbsp;<BR>到&nbsp;了&nbsp;类&nbsp;Botton&nbsp;和&nbsp;类&nbsp;Event&nbsp;。&nbsp;所&nbsp;以&nbsp;，&nbsp;我&nbsp;们&nbsp;先&nbsp;来&nbsp;看&nbsp;一&nbsp;看&nbsp;这&nbsp;两&nbsp;个&nbsp;类&nbsp;的&nbsp;用&nbsp;<BR>法&nbsp;：&nbsp;&nbsp;<BR>--&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;爱情来得快去得也快，只有猪肉卷是永恒的.&nbsp;<BR>&nbsp;<BR>※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;bbs.net.tsinghua.edu.cn·[FROM:&nbsp;166.111.5.75]&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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