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http://www.tkk7.com/shichengjun1984/articles/128364.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:24:00 GMT http://www.tkk7.com/shichengjun1984/articles/128364.html http://www.tkk7.com/shichengjun1984/comments/128364.html http://www.tkk7.com/shichengjun1984/articles/128364.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128364.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128364.html HashMap鍏佽灝唍ull浣滀負涓涓猠ntry鐨刱ey鎴栬卾alue錛岃孒ashtable涓嶅厑璁? 榪樻湁灝辨槸錛孒ashMap鎶奌ashtable鐨刢ontains鏂規硶鍘繪帀浜嗭紝鏀規垚containsvalue鍜宑ontainsKey銆傚洜涓篶ontains鏂規硶瀹規槗璁╀漢寮曡搗璇В銆? 鏈澶х殑涓嶅悓鏄紝Hashtable鐨勬柟娉曟槸Synchronize鐨勶紝鑰孒ashMap涓嶆槸錛屽湪 澶氫釜綰跨▼璁塊棶Hashtable鏃訛紝涓嶉渶瑕佽嚜宸變負瀹冪殑鏂規硶瀹炵幇鍚屾錛岃孒ashMap 灝卞繀欏諱負涔嬫彁渚涘鍚屾銆? Hashtable鍜孒ashMap閲囩敤鐨刪ash/rehash綆楁硶閮藉ぇ姒備竴鏍鳳紝鎵浠ユц兘涓嶄細鏈夊緢澶х殑宸紓銆?
]]>24錛岀紪紼嬮: 鍐欎竴涓猄ingleton鍑烘潵銆?/title> http://www.tkk7.com/shichengjun1984/articles/128363.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:23:00 GMT http://www.tkk7.com/shichengjun1984/articles/128363.html http://www.tkk7.com/shichengjun1984/comments/128363.html http://www.tkk7.com/shichengjun1984/articles/128363.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128363.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128363.html 涓鑸琒ingleton妯″紡閫氬父鏈夊嚑縐嶇褰㈠紡: 絎竴縐嶅艦寮? 瀹氫箟涓涓被錛屽畠鐨勬瀯閫犲嚱鏁頒負private鐨勶紝瀹冩湁涓涓猻tatic鐨刾rivate鐨勮綾誨彉閲忥紝鍦ㄧ被鍒濆鍖栨椂瀹炰緥璇濓紝閫氳繃涓涓猵ublic鐨刧etInstance鏂規硶鑾峰彇瀵瑰畠鐨勫紩鐢?緇ц岃皟鐢ㄥ叾涓殑鏂規硶銆?br>public class Singleton { private Singleton(){} //鍦ㄨ嚜宸卞唴閮ㄥ畾涔夎嚜宸變竴涓疄渚嬶紝鏄笉鏄緢濂囨紵 //娉ㄦ剰榪欐槸private 鍙緵鍐呴儴璋冪敤 private static Singleton instance = new Singleton(); //榪欓噷鎻愪緵浜嗕竴涓緵澶栭儴璁塊棶鏈琧lass鐨勯潤鎬佹柟娉曪紝鍙互鐩存帴璁塊棶 public static Singleton getInstance() { return instance; } } 絎簩縐嶅艦寮? public class Singleton { private static Singleton instance = null; public static synchronized Singleton getInstance() { //榪欎釜鏂規硶姣斾笂闈㈡湁鎵鏀硅繘錛屼笉鐢ㄦ瘡嬈¢兘榪涜鐢熸垚瀵硅薄錛屽彧鏄涓嬈? //浣跨敤鏃剁敓鎴愬疄渚嬶紝鎻愰珮浜嗘晥鐜囷紒 if (instance==null) instance錛漬ew Singleton(); return instance; } } 鍏朵粬褰㈠紡: 瀹氫箟涓涓被錛屽畠鐨勬瀯閫犲嚱鏁頒負private鐨勶紝鎵鏈夋柟娉曚負static鐨勩?br>
]]> 23錛屽綋涓涓璞¤褰撲綔鍙傛暟浼犻掑埌涓涓柟娉曞悗錛屾鏂規硶鍙敼鍙樿繖涓璞$殑灞炴э紝騫跺彲榪斿洖鍙樺寲鍚庣殑緇撴灉錛岄偅涔堣繖閲屽埌搴曟槸鍊間紶閫掕繕鏄紩鐢ㄤ紶閫? http://www.tkk7.com/shichengjun1984/articles/128361.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:21:00 GMT http://www.tkk7.com/shichengjun1984/articles/128361.html http://www.tkk7.com/shichengjun1984/comments/128361.html http://www.tkk7.com/shichengjun1984/articles/128361.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128361.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128361.html ]]>22錛屼袱涓璞″肩浉鍚?x.equals(y) == true)錛屼絾鍗村彲鏈変笉鍚岀殑hash code錛岃繖鍙ヨ瘽瀵逛笉瀵? http://www.tkk7.com/shichengjun1984/articles/128360.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:20:00 GMT http://www.tkk7.com/shichengjun1984/articles/128360.html http://www.tkk7.com/shichengjun1984/comments/128360.html http://www.tkk7.com/shichengjun1984/articles/128360.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128360.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128360.html 銆?
]]> 21錛宎bstract class鍜宨nterface鏈変粈涔堝尯鍒? http://www.tkk7.com/shichengjun1984/articles/128358.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:18:00 GMT http://www.tkk7.com/shichengjun1984/articles/128358.html http://www.tkk7.com/shichengjun1984/comments/128358.html http://www.tkk7.com/shichengjun1984/articles/128358.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128358.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128358.html 銆銆鎺ュ彛錛坕nterface錛夋槸鎶借薄綾葷殑鍙樹綋銆傚湪鎺ュ彛涓紝鎵鏈夋柟娉曢兘鏄娊璞$殑銆傚緇ф壙鎬у彲閫氳繃瀹炵幇榪欐牱鐨勬帴鍙h岃幏寰椼傛帴鍙d腑鐨勬墍鏈夋柟娉曢兘鏄娊璞$殑錛屾病鏈変竴涓湁紼嬪簭浣撱傛帴鍙e彧鍙互瀹氫箟static final鎴愬憳鍙橀噺銆傛帴鍙g殑瀹炵幇涓庡瓙綾葷浉浼鹼紝闄や簡璇ュ疄鐜扮被涓嶈兘浠庢帴鍙e畾涔変腑緇ф壙琛屼負銆傚綋綾誨疄鐜扮壒孌婃帴鍙f椂錛屽畠瀹氫箟錛堝嵆灝嗙▼搴忎綋緇欎簣錛夋墍鏈夎繖縐嶆帴鍙g殑鏂規硶銆傜劧鍚庯紝瀹冨彲浠ュ湪瀹炵幇浜嗚鎺ュ彛鐨勭被鐨勪換浣曞璞′笂璋冪敤鎺ュ彛鐨勬柟娉曘傜敱浜庢湁鎶借薄綾伙紝瀹冨厑璁鎬嬌鐢ㄦ帴鍙e悕浣滀負寮曠敤鍙橀噺鐨勭被鍨嬨傞氬父鐨勫姩鎬佽仈緙栧皢鐢熸晥銆傚紩鐢ㄥ彲浠ヨ漿鎹㈠埌鎺ュ彛綾誨瀷鎴栦粠鎺ュ彛綾誨瀷杞崲錛宨nstanceof 榪愮畻絎﹀彲浠ョ敤鏉ュ喅瀹氭煇瀵硅薄鐨勭被鏄惁瀹炵幇浜嗘帴鍙c?br>
]]> 19錛孫verload鍜孫verride鐨勫尯鍒侽verloaded鐨勬柟娉曟槸鍚﹀彲浠ユ敼鍙樿繑鍥炲肩殑綾誨瀷? http://www.tkk7.com/shichengjun1984/articles/128354.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:16:00 GMT http://www.tkk7.com/shichengjun1984/articles/128354.html http://www.tkk7.com/shichengjun1984/comments/128354.html http://www.tkk7.com/shichengjun1984/articles/128354.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128354.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128354.html ]]>20錛孲et閲岀殑鍏冪礌鏄笉鑳介噸澶嶇殑錛岄偅涔堢敤浠涔堟柟娉曟潵鍖哄垎閲嶅涓庡惁鍛? 鏄敤==榪樻槸equals()? 瀹冧滑鏈変綍鍖哄埆? http://www.tkk7.com/shichengjun1984/articles/128356.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:16:00 GMT http://www.tkk7.com/shichengjun1984/articles/128356.html http://www.tkk7.com/shichengjun1984/comments/128356.html http://www.tkk7.com/shichengjun1984/articles/128356.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128356.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128356.html 銆銆equals()鍜?=鏂規硶鍐沖畾寮曠敤鍊兼槸鍚︽寚鍚戝悓涓瀵硅薄equals()鍦ㄧ被涓瑕嗙洊錛屼負鐨勬槸褰撲袱涓垎紱葷殑瀵硅薄鐨勫唴瀹瑰拰綾誨瀷鐩擱厤鐨勮瘽錛岃繑鍥炵湡鍊?
]]> 18錛宻leep() 鍜? wait() 鏈変粈涔堝尯鍒? 鎼炵嚎紼嬬殑鏈鐖? http://www.tkk7.com/shichengjun1984/articles/128352.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:14:00 GMT http://www.tkk7.com/shichengjun1984/articles/128352.html http://www.tkk7.com/shichengjun1984/comments/128352.html http://www.tkk7.com/shichengjun1984/articles/128352.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128352.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128352.html 銆銆wait()鏄嚎紼嬩氦浜掓椂錛屽鏋滅嚎紼嬪涓涓悓姝ュ璞 鍙戝嚭涓涓獁ait()璋冪敤錛岃綰跨▼浼氭殏鍋滄墽琛岋紝琚皟瀵硅薄榪涘叆絳夊緟鐘舵侊紝鐩村埌琚敜閱掓垨絳夊緟鏃墮棿鍒般?
]]> 17錛宻hort s1 = 1; s1 = s1 + 1;鏈変粈涔堥敊? short s1 = 1; s1 += 1;鏈変粈涔堥敊? http://www.tkk7.com/shichengjun1984/articles/128350.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:12:00 GMT http://www.tkk7.com/shichengjun1984/articles/128350.html http://www.tkk7.com/shichengjun1984/comments/128350.html http://www.tkk7.com/shichengjun1984/articles/128350.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128350.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128350.html ]]>16錛孏C鏄粈涔? 涓轟粈涔堣鏈塆C? http://www.tkk7.com/shichengjun1984/articles/128348.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:10:00 GMT http://www.tkk7.com/shichengjun1984/articles/128348.html http://www.tkk7.com/shichengjun1984/comments/128348.html http://www.tkk7.com/shichengjun1984/articles/128348.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128348.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128348.html 銆銆System.gc() 銆銆Runtime.getRuntime().gc()
]]> 15錛孋ollection 鍜? Collections鐨勫尯鍒?/title> http://www.tkk7.com/shichengjun1984/articles/128345.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:05:00 GMT http://www.tkk7.com/shichengjun1984/articles/128345.html http://www.tkk7.com/shichengjun1984/comments/128345.html http://www.tkk7.com/shichengjun1984/articles/128345.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128345.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128345.html Collection鏄釜java.util涓嬬殑鎺ュ彛錛屽畠鏄悇縐嶉泦鍚堢粨鏋勭殑鐖舵帴鍙c?
]]> 14.&鏄綅榪愮畻絎︺?amp;&鏄竷灝旈昏緫榪愮畻絎︺?/title> http://www.tkk7.com/shichengjun1984/articles/128343.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:03:00 GMT http://www.tkk7.com/shichengjun1984/articles/128343.html http://www.tkk7.com/shichengjun1984/comments/128343.html http://www.tkk7.com/shichengjun1984/articles/128343.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128343.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128343.html HashMap 綾繪病鏈夊垎綾繪垨鑰呮帓搴忋傚畠鍏佽涓涓? null 閿拰澶氫釜 null 鍊箋? Hashtable 綾諱技浜? HashMap錛屼絾鏄笉鍏佽 null 閿拰 null 鍊箋傚畠涔熸瘮 HashMap 鎱紝鍥犱負瀹冩槸鍚屾鐨勩?nbsp;
]]> 12錛孉nonymous Inner Class 錛堝尶鍚嶅唴閮ㄧ被錛? 鏄惁鍙互extends錛堢戶鎵匡級鍏跺畠綾伙紝鏄惁鍙互implements錛堝疄鐜幫級interface錛堟帴鍙o級錛? http://www.tkk7.com/shichengjun1984/articles/128341.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:01:00 GMT http://www.tkk7.com/shichengjun1984/articles/128341.html http://www.tkk7.com/shichengjun1984/comments/128341.html http://www.tkk7.com/shichengjun1984/articles/128341.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128341.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128341.html ]]>11錛岃皥璋坒inal錛? finally錛? finalize鐨勫尯鍒?/title> http://www.tkk7.com/shichengjun1984/articles/128340.htmlI LOVE JAVA I LOVE JAVA Thu, 05 Jul 2007 07:00:00 GMT http://www.tkk7.com/shichengjun1984/articles/128340.html http://www.tkk7.com/shichengjun1984/comments/128340.html http://www.tkk7.com/shichengjun1984/articles/128340.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/128340.html http://www.tkk7.com/shichengjun1984/services/trackbacks/128340.html final錛熶慨楗扮錛堝叧閿瓧錛夊鏋滀竴涓被琚0鏄庝負final錛屾剰鍛崇潃瀹冧笉鑳藉啀媧劇敓鍑烘柊鐨勫瓙綾伙紝涓嶈兘浣滀負鐖剁被琚戶鎵褲傚洜姝や竴涓被涓嶈兘鏃㈣澹版槑涓? abstract鐨勶紝鍙堣澹版槑涓篺inal鐨勩傚皢鍙橀噺鎴栨柟娉曞0鏄庝負final錛屽彲浠ヤ繚璇佸畠浠湪浣跨敤涓笉琚敼鍙樸傝澹版槑涓篺inal鐨勫彉閲忓繀欏誨湪澹版槑鏃剁粰瀹氬垵鍊鹼紝鑰屽湪浠ュ悗鐨勫紩鐢ㄤ腑鍙兘璇誨彇錛屼笉鍙慨鏀廣傝澹版槑涓篺inal鐨勬柟娉曚篃鍚屾牱鍙兘浣跨敤錛屼笉鑳介噸杞?br>
finally錛熷啀寮傚父澶勭悊鏃舵彁渚? finally 鍧楁潵鎵ц浠諱綍娓呴櫎鎿嶄綔銆傚鏋滄姏鍑轟竴涓紓甯革紝閭d箞鐩稿尮閰嶇殑 catch 瀛愬彞灝變細鎵ц錛岀劧鍚庢帶鍒跺氨浼氳繘鍏? finally 鍧楋紙濡傛灉鏈夌殑璇濓級銆? finalize錛熸柟娉曞悕銆侸ava 鎶鏈厑璁鎬嬌鐢? finalize錛堬級 鏂規硶鍦ㄥ瀮鍦炬敹闆嗗櫒灝嗗璞′粠鍐呭瓨涓竻闄ゅ嚭鍘諱箣鍓嶅仛蹇呰鐨勬竻鐞嗗伐浣溿傝繖涓柟娉曟槸鐢卞瀮鍦炬敹闆嗗櫒鍦ㄧ‘瀹氳繖涓璞℃病鏈夎寮曠敤鏃跺榪欎釜瀵硅薄璋冪敤鐨勩傚畠鏄湪 Object 綾諱腑瀹氫箟鐨勶紝鍥犳鎵鏈夌殑綾婚兘緇ф壙浜嗗畠銆傚瓙綾昏鐩? finalize錛堬級 鏂規硶浠ユ暣鐞嗙郴緇熻祫婧愭垨鑰呮墽琛屽叾浠栨竻鐞嗗伐浣溿俧inalize錛堬級 鏂規硶鏄湪鍨冨溇鏀墮泦鍣ㄥ垹闄ゅ璞′箣鍓嶅榪欎釜瀵硅薄璋冪敤鐨勩?/p>
]]>3銆丣AVA SERVLET API涓璮orward() 涓巖edirect()鐨勫尯鍒紵 http://www.tkk7.com/shichengjun1984/articles/110256.htmlI LOVE JAVA I LOVE JAVA Thu, 12 Apr 2007 11:08:00 GMT http://www.tkk7.com/shichengjun1984/articles/110256.html http://www.tkk7.com/shichengjun1984/comments/110256.html http://www.tkk7.com/shichengjun1984/articles/110256.html#Feedback 0 http://www.tkk7.com/shichengjun1984/comments/commentRss/110256.html http://www.tkk7.com/shichengjun1984/services/trackbacks/110256.html 絳?/span>: 鍓嶈呬粎鏄鍣ㄤ腑鎺у埗鏉冪殑杞悜錛屽湪瀹㈡埛绔祻瑙堝櫒鍦板潃鏍忎腑涓嶄細鏄劇ず鍑鴻漿鍚戝悗鐨勫湴鍧錛涘悗鑰呭垯鏄畬鍏ㄧ殑璺寵漿錛屾祻瑙堝櫒灝嗕細寰楀埌璺寵漿鐨勫湴鍧錛屽茍閲嶆柊鍙戦佽姹傞摼鎺ャ傝繖鏍鳳紝浠庢祻瑙堝櫒鐨勫湴鍧鏍忎腑鍙互鐪嬪埌璺寵漿鍚庣殑閾炬帴鍦板潃銆傛墍浠ワ紝鍓嶈呮洿鍔犻珮鏁堬紝鍦ㄥ墠鑰呭彲浠ユ弧瓚抽渶瑕佹椂錛屽敖閲忎嬌鐢?/span>forward() 鏂規硶錛屽茍涓旓紝榪欐牱涔熸湁鍔╀簬闅愯棌瀹為檯鐨勯摼鎺ャ傚湪鏈変簺鎯呭喌涓嬶紝姣斿錛岄渶瑕佽煩杞埌涓涓叾瀹冩湇鍔″櫒涓婄殑璧勬簮錛屽垯蹇呴』浣跨敤
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