锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#19968;&#21306;&#31934;&#21697;&#26080;&#30721;&#44;&#20122;&#27954;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#25773;&#25918;&#22312;&#32447;&#44;&#20122;&#27954;&#20813;&#36153;&#22312;&#32447;&#35270;&#39057;</title><link>http://www.tkk7.com/xiaodong0417/category/51478.html</link><description>Java Study</description><language>zh-cn</language><lastBuildDate>Tue, 31 Jul 2012 15:34:27 GMT</lastBuildDate><pubDate>Tue, 31 Jul 2012 15:34:27 GMT</pubDate><ttl>60</ttl><item><title>Buffer涓父鐢紙蹇呯敤錛夌殑鍑犱釜鏂規(guī)硶浠嬬粛</title><link>http://www.tkk7.com/xiaodong0417/articles/383643.html</link><dc:creator>鐜嬫爲(wèi)涓?/dc:creator><author>鐜嬫爲(wèi)涓?/author><pubDate>Sat, 21 Jul 2012 07:07:00 GMT</pubDate><guid>http://www.tkk7.com/xiaodong0417/articles/383643.html</guid><wfw:comment>http://www.tkk7.com/xiaodong0417/comments/383643.html</wfw:comment><comments>http://www.tkk7.com/xiaodong0417/articles/383643.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/xiaodong0417/comments/commentRss/383643.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/xiaodong0417/services/trackbacks/383643.html</trackback:ping><description><![CDATA[棣栧厛浠嬬粛涓�涓婤uffer鐨勪嬌鐢ㄥ満鏅紝Buffer鏄疛ava NIO涓潪甯擱噸瑕佺殑涓�涓被錛屾暟鎹湪鍚勭Channel鐨勮鍐欐椂閮介渶瑕佽繖涓被鏉ョ紦鍐層�?br />
鐒惰�孊uffer鍦ㄨ鍐欎箣鍓嶉渶瑕佸仛涓�浜涘噯澶囧伐浣滐紝姣斿錛氬湪璇誨彇Buffer閲岀殑鏁版嵁涔嬪墠瑕佸厛鍦˙uffer閲屽噯澶囧ソ瑕佽鍙栨暟鎹紝寰�Buffer閲屽啓鏁版嵁鏃訛紝瑕佹壘鍑築uffer閲岀殑絀轟綑絀洪棿鎴栬�呰娓呯┖Buffer絳夌瓑銆傚仛浠ヤ笂浜嬫儏鏂規(guī)硶鏈夛細(xì)clear(), flip(), rewind().鍥犱負(fù)鎴戠粡甯歌涓嶄綇榪欏嚑涓柟娉曠殑鍔熻兘錛屾墍浠ュ湪姝よ褰曚竴涓嬶紝 涔熶緵浠栦漢鏌ユ壘銆?br />
<br />
Buffer鏈夊嚑涓笅鏍囬渶瑕佹敞鎰忥細(xì)position錛堝綋鍓嶄綅緗級錛?limit錛堝彲搴?鍐欐暟鎹?涓嬫爣鐨勬渶澶у�鹼級錛?capacity錛堝疄闄呯┖闂達(dá)級<br />
<strong>1.clear()</strong><br />
<p>浣緽uffer涓轟竴緋誨垪鏂扮殑閫氶亾璇誨彇鎴栫浉瀵規(guī)斁緗?nbsp;鎿嶄綔鍋氬ソ鍑嗗錛屽嵆涓哄線Buffer涓啓鏁版嵁鍋氬ソ鍑嗗<br />
<br />
</p>
<div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br />
<br />
Code highlighting produced by Actipro CodeHighlighter (freeware)<br />
http://www.CodeHighlighter.com/<br />
<br />
-->&nbsp;&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">final</span>&nbsp;Buffer&nbsp;clear()<br />
&nbsp;&nbsp;{<br />
&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.position&nbsp;=&nbsp;0;<br />
&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.limit&nbsp;=&nbsp;<span style="color: #0000FF; ">this</span>.capacity;<br />
&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.mark&nbsp;=&nbsp;-1;<br />
&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;<span style="color: #0000FF; ">this</span>;<br />
&nbsp;&nbsp;}</div>
<p><strong>&nbsp;2. flip()<br /></strong>浣緽uffer涓轟竴緋誨垪鏂扮殑閫氶亾鍐欏叆鎴栫浉瀵硅幏鍙?nbsp;鎿嶄綔鍋氬ソ鍑嗗錛氬畠?yōu)畣闄愬埗璁揪|負(fù)褰撳墠浣嶇疆錛岀劧鍚庡皢浣嶇疆璁劇疆涓?0銆傚嵆涓轟粠Buffer涓害鏁版嵁鍋氬ソ鍑嗗<br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />-->&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">final</span>&nbsp;Buffer&nbsp;flip()<br />&nbsp;&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.limit&nbsp;=&nbsp;<span style="color: #0000FF; ">this</span>.position;<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.position&nbsp;=&nbsp;0;<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.mark&nbsp;=&nbsp;-1;<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;<span style="color: #0000FF; ">this</span>;<br />&nbsp;&nbsp;}</div></p><strong>3.rewind()<br /></strong><div>浣跨紦鍐插尯涓洪噸鏂拌鍙栧凡鍖呭惈鐨勬暟鎹仛濂藉噯澶囷細(xì)瀹冧嬌闄愬埗淇濇寔涓嶅彉錛屽皢浣嶇疆璁劇疆涓?0銆?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />-->&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">final</span>&nbsp;Buffer&nbsp;rewind()<br />&nbsp;&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.position&nbsp;=&nbsp;0;<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">this</span>.mark&nbsp;=&nbsp;-1;<br />&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;<span style="color: #0000FF; ">this</span>;<br />&nbsp;&nbsp;}</div></div><img src ="http://www.tkk7.com/xiaodong0417/aggbug/383643.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/xiaodong0417/" target="_blank">鐜嬫爲(wèi)涓?/a> 2012-07-21 15:07 <a href="http://www.tkk7.com/xiaodong0417/articles/383643.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>ClassLoader of Java</title><link>http://www.tkk7.com/xiaodong0417/articles/376320.html</link><dc:creator>鐜嬫爲(wèi)涓?/dc:creator><author>鐜嬫爲(wèi)涓?/author><pubDate>Sun, 22 Apr 2012 09:15:00 GMT</pubDate><guid>http://www.tkk7.com/xiaodong0417/articles/376320.html</guid><wfw:comment>http://www.tkk7.com/xiaodong0417/comments/376320.html</wfw:comment><comments>http://www.tkk7.com/xiaodong0417/articles/376320.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/xiaodong0417/comments/commentRss/376320.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/xiaodong0417/services/trackbacks/376320.html</trackback:ping><description><![CDATA[涔嶄竴鐪嬪埌ClassLoader錛屾垜鐨勭涓�鎰熻灝辨槸榪欎笢瑗垮ソ紲炵鍟娿�傜劧鍚庢壘浜嗕竴涓嬭祫鏂欙紝鐣ユ噦浜嗕竴鐐圭毊姣涳紝鐒跺悗鍦ㄨ繖閲屽拰澶у鍒嗕韓涓�涓嬶紝榪欑瘒鏂囩珷鍦ㄦ帴涓嬫潵鐨勬棩瀛愰噷浼?xì)涓嶆柇鐨勮鏇存枎图屽笇鏈涗細(xì)瓒婃潵瓒婂畬鍠勩�?
<div><br />
</div>
<div>棣栧厛錛屾垜浠簡瑙ｄ竴涓婥lassLoader鏄共浠�涔堢敤鐨勫憿錛?/div>
<div>澶у閮界煡閬擄紝JVM瑙ｆ瀽鐨勬槸Class鐨勫瓧鑺傜爜鏂囦歡錛岄偅涔圝VM鎬庢牱鏉ュ姞杞借繖涓瓧鑺傜爜鏂囦歡鍛紝娌￠敊錛孋lassLoader璐熻矗浜嗚繖欏歸噸瑕佺殑宸ヤ綔銆?/div>
<div><br />
</div>
<div>JDK涓富瑕佹湁浠ヤ笅鍑犵ClassLoader錛?/div>
<div><br />
</div>
<div>
<p>a, Bootstrap ClassLoader/鍚姩綾誨姞杞藉櫒<br />
涓昏璐熻矗jdk_home/lib鐩綍涓嬬殑鏍稿績 api 鎴?-Xbootclasspath 閫夐」鎸囧畾鐨刯ar鍖呰鍏ュ伐浣?</p>
<p>&nbsp;</p>
<p>b, Extension ClassLoader/鎵╁睍綾誨姞杞藉櫒<br />
涓昏璐熻矗jdk_home/lib/ext鐩綍涓嬬殑jar鍖呮垨 -Djava.ext.dirs 鎸囧畾鐩綍涓嬬殑jar鍖呰鍏ュ伐浣?/p>
<p>&nbsp;</p>
<p>c, System ClassLoader/緋葷粺綾誨姞杞藉櫒<br />
涓昏璐熻矗java -classpath/-Djava.class.path鎵�鎸囩殑鐩綍涓嬬殑綾諱笌jar鍖呰鍏ュ伐浣?</p>
<p>&nbsp;</p>
<p>b, User Custom ClassLoader/鐢ㄦ埛鑷畾涔夌被鍔犺澆鍣?java.lang.ClassLoader鐨勫瓙綾?<br />
鍦ㄧ▼搴忚繍琛屾湡闂? 閫氳繃java.lang.ClassLoader鐨勫瓙綾誨姩鎬佸姞杞絚lass鏂囦歡, 浣撶幇java鍔ㄦ�佸疄鏃剁被瑁呭叆鐗規(guī)�?</p>
<p><br />
</p>
<p>閭ｄ箞鎴戜滑鑳界敤ClassLoader鍋氫粈涔堜簨鎯呭憿錛?/p>
<p>濡傛灉鎴戜滑鎯沖姩鎬佺殑鍔犺澆涓�涓被錛屾瘮濡傛垜浠兂瀹炵幇涓�涓狧ot-Swap鐨勫簲鐢紝鎴戜滑鏈熸湜涓�涓垰寮�鍙戠殑楂樼増鏈殑Class鍦ㄤ笉鍏抽棴JVM鐨勬儏鍐典笅璁╁畠宸ヤ綔錛屾鏃舵垜浠氨鍙互瀹炵幇鎴戜滑鑷繁鐨凜lassLoader,閲嶅啓閲岄潰鐨刦indClass鏂規(guī)硶銆?/p>
<p><br />
</p>
<p>榪欓噷鎴戜滑闇�瑕佹敞鎰廋lassLoader鐨勫弻浜插鎵樻ā寮忥紝鍗沖畾涔塁lassLoader鍔犺澆涓�涓被涔嬪墠錛岃鍏堝鎵樺畠鐨勭埗浜睠lassLoader榪涜鍔犺澆錛屽彧鏈夊綋鐖朵翰ClassLoader鏃犳硶鍔犺澆鎴愬姛鍚庯紝鎵嶄細(xì)鐢辮嚜宸卞姞杞姐�備負(fù)浠�涔堣浣跨敤榪欑鍙屼翰濮旀墭妯″紡鍛紵&nbsp;</p>
<p><br />
絎竴涓師鍥犲氨鏄洜涓鴻繖鏍峰彲浠ラ伩鍏嶉噸澶嶅姞杞斤紝褰撶埗浜插凡緇忓姞杞戒簡璇ョ被鐨勬椂鍊欙紝灝辨病鏈夊繀瑕佸瓙ClassLoader鍐嶅姞杞戒竴嬈°�?nbsp;<br />
<br />
絎簩涓師鍥犲氨鏄�冭檻鍒板畨鍏ㄥ洜绱狅紝鎴戜滑璇曟兂涓�涓嬶紝濡傛灉涓嶄嬌鐢ㄨ繖縐嶅鎵樻ā寮忥紝閭ｆ垜浠氨鍙互闅忔椂浣跨敤鑷畾涔夌殑String鏉ュ姩鎬佹浛浠ava鏍稿績api涓畾涔夌被鍨嬶紝榪欐牱浼?xì)瀛樺湪闈炲父澶х殑瀹夊叏闅愭?zhèn)ｏ紝鑰屽弻浜插鎵樼殑鏂瑰紡錛屽氨鍙互閬垮厤榪欑鎯呭喌錛屽洜涓篠tring宸茬粡鍦ㄥ惎鍔ㄦ椂琚姞杞斤紝鎵�浠ョ敤鎴瘋嚜瀹氫箟鐨凜lassLoader&nbsp;鏃犳硶鍔犺澆鍙﹀鐨凷tring銆?/p>
<p>&nbsp;</p>
<p><br />
</p>
<p>鍙傝�冭祫鏂欙細(xì)</p>
<p><a >http://www.iteye.com/topic/136427</a></p>
<p><a >http://www.iteye.com/topic/83978</a></p>
<p><br />
</p>
</div><img src ="http://www.tkk7.com/xiaodong0417/aggbug/376320.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/xiaodong0417/" target="_blank">鐜嬫爲(wèi)涓?/a> 2012-04-22 17:15 <a href="http://www.tkk7.com/xiaodong0417/articles/376320.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                  <footer>
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