锘??xml version="1.0" encoding="utf-8" standalone="yes"?>337p日本欧洲亚洲大胆鲁鲁,国产精品一区专区欧美日韩,国模大尺度视频一区二区http://www.aygfsteel.com/endisoft/category/15340.htmlI believe I can fly,I can touch the skyzh-cnFri, 02 Mar 2007 02:37:25 GMTFri, 02 Mar 2007 02:37:25 GMT60JAVA鍐欐枃浠跺埌FTP鐨勪袱縐嶆柟娉?/title><link>http://www.aygfsteel.com/endisoft/articles/URL_J2SE.html</link><dc:creator>Endisoft</dc:creator><author>Endisoft</author><pubDate>Tue, 26 Sep 2006 16:48:00 GMT</pubDate><guid>http://www.aygfsteel.com/endisoft/articles/URL_J2SE.html</guid><wfw:comment>http://www.aygfsteel.com/endisoft/comments/72149.html</wfw:comment><comments>http://www.aygfsteel.com/endisoft/articles/URL_J2SE.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/endisoft/comments/commentRss/72149.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/endisoft/services/trackbacks/72149.html</trackback:ping><description><![CDATA[浜岀鏂規(guī)硶<br />No1:<br /><div style="BORDER-RIGHT: #cccccc 1px solid; PADDING-RIGHT: 5px; BORDER-TOP: #cccccc 1px solid; PADDING-LEFT: 4px; FONT-SIZE: 13px; PADDING-BOTTOM: 4px; BORDER-LEFT: #cccccc 1px solid; WIDTH: 98%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: #cccccc 1px solid; BACKGROUND-COLOR: #eeeeee"><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /><span style="COLOR: #000000">URL聽url聽</span><span style="COLOR: #000000">=</span><span style="COLOR: #000000">聽</span><span style="COLOR: #0000ff">new</span><span style="COLOR: #000000">聽聽URL(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽ftp://javaa:javaa@172.168.2.222:21/test/javaa.txt聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽);<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />PrintWriter聽pw聽</span><span style="COLOR: #000000">=</span><span style="COLOR: #000000">聽</span><span style="COLOR: #0000ff">new</span><span style="COLOR: #000000">聽聽PrintWriter(url.openConnection().getOutputStream());<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />pw.write(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽this聽is聽a聽test聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽);<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />pw.flush();<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />pw.close();聽</span></div>No2:<br /><div style="BORDER-RIGHT: #cccccc 1px solid; PADDING-RIGHT: 5px; BORDER-TOP: #cccccc 1px solid; PADDING-LEFT: 4px; FONT-SIZE: 13px; PADDING-BOTTOM: 4px; BORDER-LEFT: #cccccc 1px solid; WIDTH: 98%; WORD-BREAK: break-all; PADDING-TOP: 4px; BORDER-BOTTOM: #cccccc 1px solid; BACKGROUND-COLOR: #eeeeee"><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /><span style="COLOR: #000000">FtpClient聽ftpClient聽</span><span style="COLOR: #000000">=</span><span style="COLOR: #000000">聽</span><span style="COLOR: #0000ff">new</span><span style="COLOR: #000000">聽聽FtpClient();<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />ftpClient.openServer(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽172.168.2.222聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽,聽</span><span style="COLOR: #000000">21</span><span style="COLOR: #000000">聽);聽</span><span style="COLOR: #008000">//</span><span style="COLOR: #008000">聽IP鍦板潃鍜岀鍙B?/span><span style="COLOR: #008000"><br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /></span><span style="COLOR: #000000">ftpClient.login(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽javaa聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽,聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽javaa聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽);聽</span><span style="COLOR: #008000">//</span><span style="COLOR: #008000">聽鐢ㄦ埛鍚嶅拰瀵嗙爜錛屽尶鍚嶇櫥闄嗙殑璇濈敤鎴峰悕涓篴nonymous,瀵嗙爜涓洪潪絀哄瓧絎︿覆聽</span><span style="COLOR: #008000"><br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /></span><span style="COLOR: #000000">ftpClient.cd(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽test聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽);聽</span><span style="COLOR: #008000">//</span><span style="COLOR: #008000">聽鍒囨崲鍒皌est鐩綍聽</span><span style="COLOR: #008000"><br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /></span><span style="COLOR: #000000">PrintWriter聽pw聽</span><span style="COLOR: #000000">=</span><span style="COLOR: #000000">聽</span><span style="COLOR: #0000ff">new</span><span style="COLOR: #000000">聽聽PrintWriter(ftpClient.put(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽javaa.txt聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽));聽</span><span style="COLOR: #008000">//</span><span style="COLOR: #008000">聽鍐欏叆鐨勬枃浠跺悕聽</span><span style="COLOR: #008000"><br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" /></span><span style="COLOR: #000000">pw.write(聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽this聽is聽a聽test聽</span><span style="COLOR: #000000">"</span><span style="COLOR: #000000">聽);<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />pw.flush();<br /><img src="http://www.aygfsteel.com/images/OutliningIndicators/None.gif" align="top" />pw.close();聽</span></div><img src ="http://www.aygfsteel.com/endisoft/aggbug/72149.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/endisoft/" target="_blank">Endisoft</a> 2006-09-27 00:48 <a href="http://www.aygfsteel.com/endisoft/articles/URL_J2SE.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>Java鍩虹---闂鏀墮泦http://www.aygfsteel.com/endisoft/articles/70639.htmlEndisoftEndisoftTue, 19 Sep 2006 15:05:00 GMThttp://www.aygfsteel.com/endisoft/articles/70639.htmlhttp://www.aygfsteel.com/endisoft/comments/70639.htmlhttp://www.aygfsteel.com/endisoft/articles/70639.html#Feedback0http://www.aygfsteel.com/endisoft/comments/commentRss/70639.htmlhttp://www.aygfsteel.com/endisoft/services/trackbacks/70639.html

1. 聽聽聽聽聽聽聽聽 闈㈠悜瀵硅薄鐨勭壒寰佹湁鍝簺鏂歸潰璇瘋緇嗚瑙?/font>

聽聽聽聽聽聽聽聽 灝佽 : 涓涓被涓湁澶氫釜鐨勫睘鎬т笌鏂規(guī)硶錛屽浜庢柟娉曚笌灞炴ф湁鍥涚淇グ絎?/span> private 銆?/span> protected 銆?/span> public 銆?/span> internal 淇グ 絎︾殑璁塊棶鏉冮檺銆?span lang="EN-US">

private : 縐佹湁鎴愬憳, 鍦ㄧ被鐨勫唴閮ㄦ墠鍙互璁塊棶銆?span lang="EN-US">

protected : 淇濇姢鎴愬憳錛岃綾誨唴閮ㄥ拰緇ф壙綾諱腑鍙互璁塊棶銆?span lang="EN-US">

public : 鍏叡鎴愬憳錛屽畬鍏ㄥ叕寮錛屾病鏈夎闂檺鍒躲?

internal: 鍦ㄥ悓涓鍖呭唴鍙互璁塊棶

聽聽聽聽聽聽聽聽 緇ф壙:瀛愮被緇ф壙鐖剁被鐨勬墍鏈夋柟娉曚笌灞炴с傚彲浠ヨ鐩栵紝鍦ㄨ鐩栫殑鏋勯犲嚱鏁板強鏂規(guī)硶閫氳繃super()錛屾柟娉?span lang="EN-US">super.鐖剁被鏂規(guī)硶鍚?span lang="EN-US">()

聽聽聽聽聽聽聽聽 澶氭?span lang="EN-US">:

n 聽聽聽聽聽聽聽聽聽 闈欐?/span> : 鏂規(guī)硶鍚嶇浉鍚岋紝鍙傛暟涓嶅悓銆?/span>

n 聽聽聽聽聽聽聽聽聽 鍔ㄦ侊細(xì)灝嗗瓙綾葷殑瀹炰緥浼犱笌鐖剁被鐨勫紩鐢紝璋冪敤鐨勬槸瀛愮被鐨勬柟娉曘傚皢瀹炵幇鎺ュ彛鐨勭被鐨勫疄渚嬩紶涓庢帴鍙g殑寮曠敤錛岃皟鐢ㄧ殑鏄疄鐜扮被鐨勬柟娉曘?/span>

2.聽聽聽聽聽聽聽 榪愯鏃跺紓甯鎬笌涓鑸紓甯告湁浣曞紓鍚岋紵

聽聽聽聽聽聽聽聽 榪愯鏃跺紓甯革細(xì)鐢?/span> java 铏氭嫙鏈烘姏鍑虹殑寮傚父銆傜敤鎴蜂笉蹇呭鐞嗐?/span>

聽聽聽聽聽聽聽聽 涓鑸紓甯告槸鐢ㄦ埛鍙互鎶涘嚭鐨勫紓甯革紝濡傛灉鎶涘嚭璋冪敤蹇呴』榪涜澶勭悊銆?/span>

3. 聽聽聽聽聽聽聽聽 璇村嚭涓浜涘父鐢ㄧ殑綾伙紝鍖?/span> , 鎺ュ彛錛岃鍚勪婦 5 涓?/span>

聽聽聽聽聽聽聽聽 綾?/span> :Math ClassLoader Class Method HttpServlet String Integer

聽聽聽聽聽聽聽聽 鍖?/span> :java.lang.* 錛?/span> java.sql.* 錛?/span> java.io.* 錛?/span> javax.xml.* 錛?/span> java.util.*

聽聽聽聽聽聽聽聽 鎺ュ彛 :CollectionSet聽聽 List聽聽 MapEJBObject EntityBean SessionBean EJBHome

4. 聽聽聽聽聽聽聽聽 String 鍜?/span> StringBuffer 鐨勫尯鍒?/span>

聽聽聽聽聽聽聽聽 String 鍦ㄥ悎騫跺瓧絎︿覆鏃惰杞寲鎴?/span> StringBuffer 錛屾墍浠ユ晥鐜囪緝浣庡害銆?/span> StringBuffer 鐨勬晥鐜囪緝楂?/span>

5. 聽聽聽聽聽聽聽聽 int 鍜?/span> Integer 鏈変粈涔堝尯鍒?/span>

聽聽聽聽聽聽聽聽 Int 鏄熀鏈殑鏁版嵁綾誨瀷錛屼笉鏄璞°?/span>

聽聽聽聽聽聽聽聽 Integer 鏄竴涓皝瑁呯被錛屽叾瀹炰緥鍙互灝佽涓涓暣鍨嬪鹼紝鍏舵湁澶氫釜鏂規(guī)硶錛屽 parseInt( 鈥溾?/span> ) 錛屽皢瀛楃涓茶漿鍖栦負(fù)浜嗕竴鏁村瀷銆?/span>

6. 聽聽聽聽聽聽聽聽 String 鏄渶鍩烘湰鐨勬暟鎹被鍨嬪悧 ?

聽聽聽聽聽聽聽聽 涓嶆槸錛屽叾鏄竴涓璞°?/font>

7. 聽聽聽聽聽聽聽聽 浣滅敤鍩?/span> public,protected,private, 浠ュ強涓嶅啓鏃剁殑鍖哄埆

聽聽聽聽聽聽聽聽 Public: 涓嶅悓鍖呫佸悓涓鍖呫佺被鍐呴兘鍙敤

聽聽聽聽聽聽聽聽 Private 錛氱被鍐?/span>

聽聽聽聽聽聽聽聽 Protected: 涓嶅悓鍖呯殑瀛愮被銆佸悓涓鍖呫佺被鍐呴兘鍙敤

聽聽聽聽聽聽聽聽 涓嶅啓鏃?/span> : 鍚屼竴鍖呭唴銆佺被鍐?/span>

8. 聽聽聽聽聽聽聽聽 char 鍨嬪彉閲忚兘涓嶈兘瀹氫箟涓轟竴涓腑鏂?/span> ? 涓轟粈涔?/span> ?

聽聽聽聽聽聽聽聽 鍙互錛屽洜鍏舵湁 16 浣嶏紝姝eソ涓涓腑鏂囨眽瀛椼?/span>

9. 聽聽聽聽聽聽聽聽 緇ф壙鏃跺欑被鐨勬墽琛岄『搴?/font>

聽聽聽聽聽聽聽聽 鍏堟槸鐖剁被錛屽悗鏄瓙綾匯?/font>

10. 聽聽聽聽 鍐呴儴綾葷殑瀹炵幇鏂瑰紡 ?

鍐呴儴綾?/span> (1)

Public class superClass

{

聽聽聽聽聽聽 Pubic class subclass

聽聽聽聽聽聽 {

}

}

鍖垮悕綾?/font>

Public class superClass extends Frame

{

聽聽聽聽聽聽 This.addActionListener

(聽聽聽聽聽

new ActionListener()

聽聽聽聽聽聽聽聽聽聽聽聽聽 Public void actionPerformed(ActionEvent e)

聽聽聽聽聽聽聽聽聽聽聽聽聽 {

聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 e.printStackTrace();

}

)

}

11. 聽聽聽聽 鍨冨溇鍥炴敹鏈哄埗 , 濡備綍浼樺寲紼嬪簭 ?

聽聽聽聽聽聽聽聽 闈欐佸唴瀛樺瓨鏀劇殑鏄被錛屽姩鎬佸唴瀛樺瓨鏀劇殑鏄璞★紙闈炶В鎬佺殑灞炴э級錛屽綋涓涓疄渚嬫病鏈夊紩鐢ㄦ椂鐢?/span> JVM 鏀跺洖瀹炰緥鎵鍗犵殑鍐呭瓨銆?/span>

12. 聽聽聽聽 float 鍨?/span> float f=3.4 鏄惁姝g‘ ?

聽聽聽聽聽聽聽聽 鎶ラ敊錛屽簲褰撴槸 float f=3.4f

聽聽聽聽聽聽聽聽 濡傛灉鏄?/span> float f=3( 鏁存暟 ) 姝g‘

13. 聽聽聽聽 璋堣皥 final, finally, finalize 鐨勫尯鍒?/span>

聽聽聽聽聽聽聽聽 Final 錛氫笉鍙彉錛屽湪綾誨墠涓嶅彲琚戶鎵褲佸湪鏂規(guī)硶鍓嶄笉鍙瑕嗙洊銆佸湪灞炴у墠鏄父閲?/span>

聽聽聽聽聽聽聽聽 Finally: 鏄紓甯稿鐞嗕腑鐨勪笉綆℃湁娌℃湁閿欓兘鎵ц涓嬈°?/span>

聽聽聽聽聽聽聽聽 Finalize 錛氭槸綾葷駭鐨勬柟娉曪紝褰撹繖涓被鐨勫疄渚嬭 JVM 娓呴櫎鏃朵細(xì)鑷姩璋冪敤銆?/span>

14. 聽聽聽聽 Anonymous Inner Class ( 鍖垮悕鍐呴儴綾?/span> ) 鏄惁鍙互 extends( 緇ф壙 ) 鍏跺畠綾伙紝鏄惁鍙互 implements( 瀹炵幇 )interface( 鎺ュ彛 )?

聽聽聽聽聽聽聽聽 鍙互錛屼絾涓嶅啓 extends 鎴?/span> implements 鎺ュ彛錛岃屾槸鐩存帴 new 鎺ュ彛鎴?/span> new 鐖剁被銆?/span>

15. 聽聽聽聽 Static Nested Class 鍜?/span> Inner Class 鐨勪笉鍚岋紝璇村緱瓚婂瓚婂ソ ( 闈㈣瘯棰樻湁鐨勫緢絎肩粺 ) 銆?/span>

16. 聽聽聽聽 & 鍜?/span> && 鐨勫尯鍒?/span>

聽聽聽聽聽聽聽聽 && 鐨勬槸鐭礬涓庯紝鏄宸﹁竟涓?/span> false 錛岀洿鎺ヨ繑鍥炲鍙寵竟涓嶈繘琛屽垽鏂?/span>

聽聽聽聽聽聽聽聽 & 鏄笌錛屽乏杈逛負(fù) false 錛屽彸杈硅繕瑕佽繘琛岃綆楋紝鎵浠ユ晥鐜囦綆涓浜?/span>

17. 聽聽聽聽 GC 鏄粈涔?/span> ? 涓轟粈涔堣鏈?/span> GC?

聽聽聽聽聽聽聽聽 Gc 鏄富鍔ㄨ繘琛屽瀮鍦炬敹闆嗐?/span>

聽聽聽聽聽聽聽聽 浠g爜濡備笅

Runtime r=Runtime.getRuntime();

r.gc();

18. 聽聽聽聽 String s = new String("xyz"); 鍒涘緩浜嗗嚑涓?/span> String Object?

19. 聽聽聽聽 Math.round(11.5) 絳夋柤澶氬皯 ? Math.round(-11.5) 絳夋柤澶氬皯 ?

聽聽聽聽聽聽聽聽 Math.round(11.5)=12

聽聽聽聽聽聽聽聽 Math.round(-11.5)=-11

20. 聽聽聽聽 short s1 = 1; s1 = s1 + 1; 鏈変粈涔堥敊 ? short s1 = 1; s1 += 1; 鏈変粈涔堥敊 ?

褰撶敤 + 鍙鋒椂錛?/span> Short 涓嶅彲浠ョ洿鎺ョ浉鍔狅紝蹇呴』灝?/span> short 杞寲涓?/span> int 鎵嶅彲浠ユ墽琛屻傚涓?/span>

聽聽聽聽聽聽聽聽 a=(short)((int)a+1);

聽聽聽聽聽聽聽聽 short s1 = 1; s1 += 1; 姝g‘錛屾病鏈夐敊璇?/span>



Endisoft 2006-09-19 23:05 鍙戣〃璇勮
]]>
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