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<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15.1&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Tue&nbsp;May&nbsp;12&nbsp;19:11:58&nbsp;1998)&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;<BR>来&nbsp;自&nbsp;Java&nbsp;的&nbsp;传&nbsp;说&nbsp;(15)&nbsp;&nbsp;<BR>作者&nbsp;：&nbsp;清&nbsp;华&nbsp;大&nbsp;学&nbsp;教&nbsp;授&nbsp;：&nbsp;王&nbsp;克&nbsp;宏&nbsp;<BR>教&nbsp;学&nbsp;纲&nbsp;要&nbsp;<BR>有&nbsp;了&nbsp;Java&nbsp;，&nbsp;你&nbsp;和&nbsp;Homepage&nbsp;的&nbsp;交&nbsp;互&nbsp;不&nbsp;仅&nbsp;仅&nbsp;是&nbsp;点&nbsp;<BR>击&nbsp;某&nbsp;个&nbsp;字&nbsp;、&nbsp;按&nbsp;钮&nbsp;或&nbsp;者&nbsp;图&nbsp;，&nbsp;它&nbsp;切&nbsp;换&nbsp;成&nbsp;下&nbsp;一&nbsp;页&nbsp;。&nbsp;Java&nbsp;为&nbsp;<BR>浏&nbsp;览&nbsp;Homepage&nbsp;的&nbsp;用&nbsp;户&nbsp;提&nbsp;供&nbsp;了&nbsp;地&nbsp;地&nbsp;道&nbsp;道&nbsp;的&nbsp;交&nbsp;互&nbsp;。&nbsp;包&nbsp;含&nbsp;<BR>了&nbsp;Java&nbsp;程&nbsp;序&nbsp;的&nbsp;Homepage&nbsp;知&nbsp;道&nbsp;你&nbsp;需&nbsp;要&nbsp;它&nbsp;做&nbsp;什&nbsp;么&nbsp;，&nbsp;而&nbsp;不&nbsp;<BR>是&nbsp;简&nbsp;简&nbsp;单&nbsp;单&nbsp;地&nbsp;切&nbsp;换&nbsp;到&nbsp;下&nbsp;一&nbsp;页&nbsp;。&nbsp;你&nbsp;一&nbsp;定&nbsp;认&nbsp;为&nbsp;这&nbsp;是&nbsp;理&nbsp;所&nbsp;<BR>当&nbsp;然&nbsp;的&nbsp;，&nbsp;可&nbsp;是&nbsp;没&nbsp;有&nbsp;Java&nbsp;以&nbsp;前&nbsp;，&nbsp;事&nbsp;情&nbsp;可&nbsp;没&nbsp;这&nbsp;么&nbsp;简&nbsp;单&nbsp;。&nbsp;<BR>&nbsp;交&nbsp;互&nbsp;的&nbsp;Java&nbsp;世&nbsp;界&nbsp;&nbsp;<BR>鼠&nbsp;标&nbsp;引&nbsp;发&nbsp;的&nbsp;各&nbsp;种&nbsp;事&nbsp;件&nbsp;&nbsp;<BR>编&nbsp;写&nbsp;自&nbsp;己&nbsp;的&nbsp;事&nbsp;件&nbsp;处&nbsp;理&nbsp;代&nbsp;码&nbsp;&nbsp;<BR>键&nbsp;盘&nbsp;引&nbsp;发&nbsp;的&nbsp;事&nbsp;件&nbsp;&nbsp;<BR>在&nbsp;Internet&nbsp;上&nbsp;实&nbsp;现&nbsp;与&nbsp;程&nbsp;序&nbsp;的&nbsp;实&nbsp;时&nbsp;交&nbsp;互&nbsp;&nbsp;<BR>&nbsp;也&nbsp;许&nbsp;你&nbsp;要&nbsp;问&nbsp;“&nbsp;Java&nbsp;怎&nbsp;么&nbsp;知&nbsp;道&nbsp;我&nbsp;点&nbsp;了&nbsp;鼠&nbsp;标&nbsp;？&nbsp;按&nbsp;<BR>了&nbsp;哪&nbsp;个&nbsp;键&nbsp;？&nbsp;”&nbsp;它&nbsp;当&nbsp;然&nbsp;知&nbsp;道&nbsp;。&nbsp;你&nbsp;对&nbsp;鼠&nbsp;标&nbsp;或&nbsp;键&nbsp;盘&nbsp;的&nbsp;如&nbsp;何&nbsp;<BR>操&nbsp;作&nbsp;对&nbsp;Java&nbsp;而&nbsp;言&nbsp;都&nbsp;称&nbsp;之&nbsp;为&nbsp;“&nbsp;事&nbsp;件&nbsp;”&nbsp;，&nbsp;例&nbsp;如&nbsp;：&nbsp;移&nbsp;动&nbsp;鼠&nbsp;<BR>标&nbsp;，&nbsp;点&nbsp;击&nbsp;鼠&nbsp;标&nbsp;，&nbsp;按&nbsp;下&nbsp;某&nbsp;个&nbsp;按&nbsp;键&nbsp;…&nbsp;…&nbsp;。&nbsp;这&nbsp;些&nbsp;事&nbsp;件&nbsp;发&nbsp;生&nbsp;<BR>了&nbsp;以&nbsp;后&nbsp;，&nbsp;系&nbsp;统&nbsp;就&nbsp;会&nbsp;通&nbsp;知&nbsp;Java&nbsp;去&nbsp;处&nbsp;理&nbsp;，&nbsp;就&nbsp;好&nbsp;比&nbsp;你&nbsp;按&nbsp;了&nbsp;<BR>门&nbsp;铃&nbsp;，&nbsp;让&nbsp;主&nbsp;人&nbsp;来&nbsp;为&nbsp;你&nbsp;开&nbsp;门&nbsp;一&nbsp;样&nbsp;。&nbsp;在&nbsp;这&nbsp;一&nbsp;章&nbsp;里&nbsp;，&nbsp;你&nbsp;将&nbsp;<BR>学&nbsp;会&nbsp;编&nbsp;写&nbsp;这&nbsp;种&nbsp;交&nbsp;互&nbsp;式&nbsp;的&nbsp;程&nbsp;序&nbsp;来&nbsp;响&nbsp;应&nbsp;鼠&nbsp;标&nbsp;和&nbsp;键&nbsp;盘&nbsp;的&nbsp;输&nbsp;<BR>入&nbsp;，&nbsp;让&nbsp;Java&nbsp;干&nbsp;你&nbsp;想&nbsp;让&nbsp;它&nbsp;干&nbsp;的&nbsp;事&nbsp;情&nbsp;。&nbsp;你&nbsp;可&nbsp;以&nbsp;让&nbsp;它&nbsp;告&nbsp;诉&nbsp;<BR>你&nbsp;当&nbsp;前&nbsp;鼠&nbsp;标&nbsp;所&nbsp;处&nbsp;的&nbsp;位&nbsp;置&nbsp;，&nbsp;拖&nbsp;动&nbsp;鼠&nbsp;标&nbsp;画&nbsp;你&nbsp;想&nbsp;画&nbsp;的&nbsp;东&nbsp;西&nbsp;<BR>，&nbsp;或&nbsp;者&nbsp;用&nbsp;键&nbsp;盘&nbsp;控&nbsp;制&nbsp;Homepage&nbsp;中&nbsp;图&nbsp;形&nbsp;的&nbsp;位&nbsp;置&nbsp;，&nbsp;甚&nbsp;至&nbsp;可&nbsp;<BR>以&nbsp;编&nbsp;一&nbsp;个&nbsp;由&nbsp;鼠&nbsp;标&nbsp;控&nbsp;制&nbsp;的&nbsp;小&nbsp;游&nbsp;戏&nbsp;。&nbsp;<BR>你&nbsp;对&nbsp;鼠&nbsp;标&nbsp;做&nbsp;了&nbsp;什&nbsp;么&nbsp;<BR>&nbsp;你&nbsp;对&nbsp;鼠&nbsp;标&nbsp;所&nbsp;做&nbsp;的&nbsp;任&nbsp;何&nbsp;操&nbsp;作&nbsp;，&nbsp;系&nbsp;统&nbsp;都&nbsp;会&nbsp;产&nbsp;生&nbsp;一&nbsp;<BR>个&nbsp;所&nbsp;谓&nbsp;“&nbsp;事&nbsp;件&nbsp;”&nbsp;通&nbsp;知&nbsp;Java&nbsp;。&nbsp;如&nbsp;果&nbsp;鼠&nbsp;标&nbsp;被&nbsp;按&nbsp;下&nbsp;，&nbsp;Java&nbsp;将&nbsp;<BR>得&nbsp;到&nbsp;一&nbsp;个&nbsp;来&nbsp;自&nbsp;系&nbsp;统&nbsp;的&nbsp;通&nbsp;知&nbsp;--MOUSE_DOWN&nbsp;。&nbsp;那&nbsp;么&nbsp;释&nbsp;放&nbsp;<BR>鼠&nbsp;标&nbsp;，&nbsp;是&nbsp;不&nbsp;是&nbsp;就&nbsp;是&nbsp;MOUSE_UP&nbsp;呢&nbsp;？&nbsp;没&nbsp;错&nbsp;，&nbsp;就&nbsp;是&nbsp;这&nbsp;样&nbsp;。&nbsp;<BR>可&nbsp;是&nbsp;鼠&nbsp;标&nbsp;通&nbsp;常&nbsp;都&nbsp;有&nbsp;两&nbsp;、&nbsp;三&nbsp;个&nbsp;按&nbsp;键&nbsp;，&nbsp;Java&nbsp;怎&nbsp;么&nbsp;知&nbsp;道&nbsp;我&nbsp;<BR>按&nbsp;的&nbsp;是&nbsp;哪&nbsp;一&nbsp;个&nbsp;呢&nbsp;？&nbsp;不&nbsp;用&nbsp;担&nbsp;心&nbsp;，&nbsp;Java&nbsp;对&nbsp;所&nbsp;有&nbsp;的&nbsp;鼠&nbsp;标&nbsp;按&nbsp;<BR>键&nbsp;都&nbsp;一&nbsp;视&nbsp;同&nbsp;仁&nbsp;，&nbsp;只&nbsp;要&nbsp;你&nbsp;按&nbsp;了&nbsp;键&nbsp;，&nbsp;MOUSE_DOWN&nbsp;事&nbsp;件&nbsp;<BR>就&nbsp;产&nbsp;生&nbsp;，&nbsp;不&nbsp;管&nbsp;按&nbsp;的&nbsp;是&nbsp;哪&nbsp;一&nbsp;个&nbsp;。&nbsp;<BR>&nbsp;对&nbsp;鼠&nbsp;标&nbsp;的&nbsp;操&nbsp;作&nbsp;可&nbsp;不&nbsp;仅&nbsp;仅&nbsp;是&nbsp;按&nbsp;下&nbsp;或&nbsp;释&nbsp;放&nbsp;，&nbsp;其&nbsp;实&nbsp;<BR>用&nbsp;的&nbsp;最&nbsp;多&nbsp;的&nbsp;还&nbsp;是&nbsp;移&nbsp;动&nbsp;鼠&nbsp;标&nbsp;。&nbsp;一&nbsp;旦&nbsp;你&nbsp;移&nbsp;动&nbsp;了&nbsp;鼠&nbsp;标&nbsp;，&nbsp;<BR>Java&nbsp;就&nbsp;会&nbsp;从&nbsp;系&nbsp;统&nbsp;那&nbsp;里&nbsp;得&nbsp;到&nbsp;一&nbsp;个&nbsp;MOUSE_MOVE&nbsp;的&nbsp;通&nbsp;知&nbsp;。&nbsp;<BR>鼠&nbsp;标&nbsp;移&nbsp;动&nbsp;还&nbsp;有&nbsp;另&nbsp;一&nbsp;种&nbsp;方&nbsp;式&nbsp;，&nbsp;那&nbsp;就&nbsp;是&nbsp;拖&nbsp;动&nbsp;，&nbsp;它&nbsp;和&nbsp;移&nbsp;动&nbsp;<BR>有&nbsp;什&nbsp;么&nbsp;不&nbsp;同&nbsp;呢&nbsp;？&nbsp;移&nbsp;动&nbsp;时&nbsp;并&nbsp;未&nbsp;按&nbsp;鼠&nbsp;标&nbsp;按&nbsp;键&nbsp;，&nbsp;它&nbsp;产&nbsp;生&nbsp;的&nbsp;<BR>事&nbsp;件&nbsp;是&nbsp;MOUSE_MOVE&nbsp;。&nbsp;如&nbsp;果&nbsp;你&nbsp;移&nbsp;动&nbsp;鼠&nbsp;标&nbsp;的&nbsp;同&nbsp;时&nbsp;还&nbsp;按&nbsp;<BR>住&nbsp;了&nbsp;鼠&nbsp;标&nbsp;按&nbsp;键&nbsp;，&nbsp;这&nbsp;就&nbsp;是&nbsp;拖&nbsp;动&nbsp;，&nbsp;它&nbsp;产&nbsp;生&nbsp;的&nbsp;事&nbsp;件&nbsp;将&nbsp;不&nbsp;再&nbsp;<BR>是&nbsp;MOUSE_MOVE&nbsp;，&nbsp;而&nbsp;是&nbsp;MOUSE_DRAG&nbsp;了&nbsp;。&nbsp;<BR>&nbsp;Java&nbsp;Applet&nbsp;对&nbsp;鼠&nbsp;标&nbsp;的&nbsp;动&nbsp;作&nbsp;可&nbsp;以&nbsp;非&nbsp;常&nbsp;敏&nbsp;感&nbsp;，&nbsp;只&nbsp;<BR>要&nbsp;鼠&nbsp;标&nbsp;进&nbsp;入&nbsp;Applet&nbsp;窗&nbsp;口&nbsp;的&nbsp;范&nbsp;围&nbsp;，&nbsp;它&nbsp;就&nbsp;会&nbsp;有&nbsp;所&nbsp;反&nbsp;应&nbsp;，&nbsp;<BR>这&nbsp;是&nbsp;通&nbsp;过&nbsp;MOUSE_ENTER&nbsp;实&nbsp;现&nbsp;的&nbsp;，&nbsp;MOUSE_ENTER&nbsp;表&nbsp;示&nbsp;<BR>鼠&nbsp;标&nbsp;指&nbsp;针&nbsp;进&nbsp;入&nbsp;到&nbsp;Applet&nbsp;的&nbsp;范&nbsp;围&nbsp;，&nbsp;反&nbsp;之&nbsp;，&nbsp;MOUSE_EXIT&nbsp;<BR>就&nbsp;是&nbsp;鼠&nbsp;标&nbsp;离&nbsp;开&nbsp;时&nbsp;产&nbsp;生&nbsp;的&nbsp;事&nbsp;件&nbsp;了&nbsp;。&nbsp;<BR>&nbsp;你&nbsp;也&nbsp;许&nbsp;要&nbsp;奇&nbsp;怪&nbsp;了&nbsp;,&nbsp;“&nbsp;前&nbsp;面&nbsp;编&nbsp;了&nbsp;这&nbsp;么&nbsp;多&nbsp;Java&nbsp;程&nbsp;序&nbsp;<BR>，&nbsp;我&nbsp;对&nbsp;鼠&nbsp;标&nbsp;作&nbsp;了&nbsp;这&nbsp;么&nbsp;多&nbsp;操&nbsp;作&nbsp;，&nbsp;怎&nbsp;么&nbsp;都&nbsp;没&nbsp;有&nbsp;反&nbsp;应&nbsp;呢&nbsp;？&nbsp;<BR>”&nbsp;当&nbsp;然&nbsp;不&nbsp;会&nbsp;有&nbsp;反&nbsp;应&nbsp;！&nbsp;因&nbsp;为&nbsp;系&nbsp;统&nbsp;虽&nbsp;然&nbsp;通&nbsp;知&nbsp;了&nbsp;Java&nbsp;，&nbsp;鼠&nbsp;<BR>标&nbsp;做&nbsp;了&nbsp;什&nbsp;么&nbsp;，&nbsp;键&nbsp;盘&nbsp;被&nbsp;按&nbsp;了&nbsp;哪&nbsp;个&nbsp;键&nbsp;,&nbsp;可&nbsp;是&nbsp;Java&nbsp;并&nbsp;没&nbsp;有&nbsp;告&nbsp;<BR>诉&nbsp;系&nbsp;统&nbsp;，&nbsp;鼠&nbsp;标&nbsp;或&nbsp;键&nbsp;盘&nbsp;动&nbsp;作&nbsp;了&nbsp;以&nbsp;后&nbsp;应&nbsp;该&nbsp;作&nbsp;何&nbsp;反&nbsp;应&nbsp;。&nbsp;就&nbsp;<BR>好&nbsp;像&nbsp;门&nbsp;铃&nbsp;响&nbsp;了&nbsp;，&nbsp;你&nbsp;知&nbsp;道&nbsp;去&nbsp;开&nbsp;门&nbsp;；&nbsp;电&nbsp;话&nbsp;铃&nbsp;响&nbsp;了&nbsp;，&nbsp;应&nbsp;该&nbsp;<BR>接&nbsp;电&nbsp;话&nbsp;。&nbsp;我&nbsp;们&nbsp;也&nbsp;可&nbsp;以&nbsp;通&nbsp;过&nbsp;自&nbsp;己&nbsp;编&nbsp;写&nbsp;的&nbsp;Java&nbsp;程&nbsp;序&nbsp;，&nbsp;告&nbsp;<BR>诉&nbsp;系&nbsp;统&nbsp;对&nbsp;鼠&nbsp;标&nbsp;、&nbsp;键&nbsp;盘&nbsp;的&nbsp;操&nbsp;作&nbsp;做&nbsp;出&nbsp;相&nbsp;应&nbsp;的&nbsp;反&nbsp;应&nbsp;。&nbsp;<BR>鼠&nbsp;标&nbsp;被&nbsp;按&nbsp;下&nbsp;了&nbsp;<BR>我&nbsp;们&nbsp;在&nbsp;上&nbsp;一&nbsp;节&nbsp;已&nbsp;经&nbsp;知&nbsp;道&nbsp;鼠&nbsp;标&nbsp;被&nbsp;按&nbsp;下&nbsp;会&nbsp;产&nbsp;生&nbsp;应&nbsp;<BR>该&nbsp;叫&nbsp;MOUSE_DOWN&nbsp;的&nbsp;事&nbsp;件&nbsp;，&nbsp;如&nbsp;果&nbsp;你&nbsp;想&nbsp;在&nbsp;鼠&nbsp;标&nbsp;按&nbsp;下&nbsp;时&nbsp;<BR>做&nbsp;点&nbsp;儿&nbsp;什&nbsp;么&nbsp;，&nbsp;就&nbsp;应&nbsp;该&nbsp;把&nbsp;你&nbsp;想&nbsp;做&nbsp;的&nbsp;事&nbsp;情&nbsp;写&nbsp;到&nbsp;mouseDown&nbsp;<BR>这&nbsp;个&nbsp;方&nbsp;法&nbsp;中&nbsp;去&nbsp;,&nbsp;那&nbsp;么&nbsp;一&nbsp;旦&nbsp;鼠&nbsp;标&nbsp;被&nbsp;按&nbsp;下&nbsp;，&nbsp;系&nbsp;统&nbsp;就&nbsp;会&nbsp;去&nbsp;执&nbsp;<BR>行&nbsp;你&nbsp;在&nbsp;mouseDown&nbsp;这&nbsp;个&nbsp;方&nbsp;法&nbsp;里&nbsp;让&nbsp;它&nbsp;做&nbsp;的&nbsp;事&nbsp;情&nbsp;。&nbsp;<BR>mouseDown&nbsp;的&nbsp;写&nbsp;法&nbsp;是&nbsp;这&nbsp;样&nbsp;的&nbsp;：&nbsp;<BR>　&nbsp;　&nbsp;public&nbsp;boolean&nbsp;mouseDown&nbsp;(&nbsp;Event&nbsp;evt&nbsp;,&nbsp;int&nbsp;x&nbsp;,&nbsp;int&nbsp;y&nbsp;)&nbsp;{&nbsp;…&nbsp;}&nbsp;<BR>&nbsp;你&nbsp;打&nbsp;算&nbsp;在&nbsp;鼠&nbsp;标&nbsp;按&nbsp;下&nbsp;后&nbsp;做&nbsp;的&nbsp;事&nbsp;情&nbsp;就&nbsp;填&nbsp;在&nbsp;{&nbsp;}&nbsp;里&nbsp;，&nbsp;<BR>这&nbsp;样&nbsp;一&nbsp;来&nbsp;，&nbsp;只&nbsp;要&nbsp;鼠&nbsp;标&nbsp;被&nbsp;按&nbsp;下&nbsp;了&nbsp;，&nbsp;系&nbsp;统&nbsp;自&nbsp;己&nbsp;就&nbsp;会&nbsp;去&nbsp;调&nbsp;<BR>用&nbsp;mouseDown&nbsp;，&nbsp;做&nbsp;你&nbsp;让&nbsp;它&nbsp;做&nbsp;的&nbsp;事&nbsp;情&nbsp;。&nbsp;<BR>&nbsp;这&nbsp;里&nbsp;的&nbsp;参&nbsp;数&nbsp;都&nbsp;是&nbsp;什&nbsp;么&nbsp;意&nbsp;思&nbsp;呢&nbsp;？&nbsp;evt&nbsp;表&nbsp;示&nbsp;一&nbsp;个&nbsp;<BR>事&nbsp;件&nbsp;，&nbsp;在&nbsp;这&nbsp;个&nbsp;方&nbsp;法&nbsp;里&nbsp;它&nbsp;表&nbsp;示&nbsp;“&nbsp;鼠&nbsp;标&nbsp;按&nbsp;下&nbsp;”&nbsp;这&nbsp;个&nbsp;事&nbsp;件&nbsp;<BR>。&nbsp;它&nbsp;前&nbsp;面&nbsp;的&nbsp;Event&nbsp;（&nbsp;事&nbsp;件&nbsp;）&nbsp;说&nbsp;明&nbsp;了&nbsp;evt&nbsp;是&nbsp;个&nbsp;事&nbsp;件&nbsp;类&nbsp;型&nbsp;的&nbsp;<BR>对&nbsp;象&nbsp;。&nbsp;x&nbsp;和&nbsp;y&nbsp;是&nbsp;evt&nbsp;这&nbsp;个&nbsp;事&nbsp;件&nbsp;发&nbsp;生&nbsp;时&nbsp;鼠&nbsp;标&nbsp;的&nbsp;坐&nbsp;标&nbsp;,&nbsp;也&nbsp;就&nbsp;<BR>是&nbsp;你&nbsp;击&nbsp;鼠&nbsp;标&nbsp;的&nbsp;位&nbsp;置&nbsp;。&nbsp;boolean&nbsp;又&nbsp;是&nbsp;什&nbsp;么&nbsp;呢&nbsp;？&nbsp;它&nbsp;表&nbsp;示&nbsp;<BR>mouseDown&nbsp;这&nbsp;个&nbsp;方&nbsp;法&nbsp;的&nbsp;返&nbsp;回&nbsp;值&nbsp;类&nbsp;型&nbsp;是&nbsp;一&nbsp;个&nbsp;布&nbsp;尔&nbsp;类&nbsp;型&nbsp;的&nbsp;<BR>值&nbsp;。&nbsp;怎&nbsp;么&nbsp;越&nbsp;讲&nbsp;越&nbsp;糊&nbsp;涂&nbsp;了&nbsp;呢&nbsp;？&nbsp;其&nbsp;实&nbsp;，&nbsp;你&nbsp;也&nbsp;不&nbsp;要&nbsp;太&nbsp;在&nbsp;意&nbsp;<BR>。&nbsp;如&nbsp;果&nbsp;你&nbsp;对&nbsp;“&nbsp;鼠&nbsp;标&nbsp;按&nbsp;下&nbsp;”&nbsp;这&nbsp;一&nbsp;事&nbsp;件&nbsp;进&nbsp;行&nbsp;了&nbsp;处&nbsp;理&nbsp;，&nbsp;就&nbsp;<BR>尽&nbsp;管&nbsp;返&nbsp;回&nbsp;“&nbsp;true&nbsp;&quot;&nbsp;（&nbsp;是&nbsp;）&nbsp;好&nbsp;了&nbsp;。&nbsp;<BR>&nbsp;一&nbsp;样&nbsp;的&nbsp;道&nbsp;理&nbsp;，&nbsp;我&nbsp;们&nbsp;知&nbsp;道&nbsp;松&nbsp;开&nbsp;鼠&nbsp;标&nbsp;产&nbsp;生&nbsp;的&nbsp;事&nbsp;件&nbsp;<BR>是&nbsp;MOUSE_UP&nbsp;，&nbsp;如&nbsp;果&nbsp;你&nbsp;想&nbsp;处&nbsp;理&nbsp;“&nbsp;释&nbsp;放&nbsp;鼠&nbsp;标&nbsp;”&nbsp;这&nbsp;个&nbsp;事&nbsp;件&nbsp;<BR>，&nbsp;就&nbsp;把&nbsp;程&nbsp;序&nbsp;写&nbsp;在&nbsp;mouseUp&nbsp;这&nbsp;个&nbsp;方&nbsp;法&nbsp;里&nbsp;。&nbsp;它&nbsp;的&nbsp;写&nbsp;法&nbsp;和&nbsp;<BR>mouseDown&nbsp;很&nbsp;类&nbsp;似&nbsp;，&nbsp;<BR>　&nbsp;　&nbsp;public&nbsp;boolean&nbsp;mouseUp&nbsp;(&nbsp;Event&nbsp;evt&nbsp;,&nbsp;int&nbsp;x&nbsp;,&nbsp;int&nbsp;y&nbsp;)&nbsp;{&nbsp;…&nbsp;}&nbsp;<BR>不&nbsp;同&nbsp;的&nbsp;是&nbsp;这&nbsp;里&nbsp;的&nbsp;evt&nbsp;所&nbsp;代&nbsp;表&nbsp;的&nbsp;就&nbsp;不&nbsp;是&nbsp;“&nbsp;按&nbsp;下&nbsp;鼠&nbsp;标&nbsp;”&nbsp;而&nbsp;<BR>是&nbsp;“&nbsp;释&nbsp;放&nbsp;鼠&nbsp;标&nbsp;”&nbsp;了&nbsp;。&nbsp;一&nbsp;般&nbsp;情&nbsp;况&nbsp;下&nbsp;，&nbsp;我&nbsp;们&nbsp;只&nbsp;关&nbsp;心&nbsp;“&nbsp;按&nbsp;<BR>下&nbsp;鼠&nbsp;标&nbsp;”&nbsp;这&nbsp;一&nbsp;事&nbsp;件&nbsp;，&nbsp;至&nbsp;于&nbsp;是&nbsp;否&nbsp;“&nbsp;释&nbsp;放&nbsp;鼠&nbsp;标&nbsp;”&nbsp;就&nbsp;不&nbsp;需&nbsp;<BR>要&nbsp;理&nbsp;会&nbsp;了&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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