锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲精品无码永久在线观看你懂的,久久夜色精品国产亚洲,国产精品亚洲A∨天堂不卡 http://m.tkk7.com/dongond/category/44442.html澶у璁板繂錛岃繃寰鐨勭粓鐐癸紝鏂扮殑璧風偣...zh-cnWed, 22 Feb 2012 20:41:55 GMTWed, 22 Feb 2012 20:41:55 GMT60about Stringhttp://m.tkk7.com/dongond/archive/2012/02/22/370531.html杞誨竼鍚戝崡杞誨竼鍚戝崡Wed, 22 Feb 2012 09:26:00 GMThttp://m.tkk7.com/dongond/archive/2012/02/22/370531.htmlhttp://m.tkk7.com/dongond/comments/370531.htmlhttp://m.tkk7.com/dongond/archive/2012/02/22/370531.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/370531.htmlhttp://m.tkk7.com/dongond/services/trackbacks/370531.html銆恴z 緗戜笂鍏充簬String鐨勮璁哄緢澶氾紝榪欐璁茶В璁╂垜紼嶇◢鏈変簡鐐瑰ご緇細錛夈?br />鍏堟潵浜嗚В涓涓婮VM榪愯鏃舵暟鎹尯鐨勫唴瀛樻ā鍨嬨?/span>
銆婃繁鍏ava铏氭嫙鏈恒嬩功涓槸榪欐牱鎻忚堪鐨勶細JVM榪愯鏃舵暟鎹尯鐨勫唴瀛樻ā鍨嬬敱浜旈儴鍒嗙粍鎴愶細
銆?銆戞柟娉曞尯
銆?銆戝爢
銆?銆慗ava鏍?/span>
銆?銆慞C瀵勫瓨鍣?/span>
銆?銆戞湰鍦版柟娉曟爤

瀵逛簬String s = "hello" ,瀹冪殑铏氭嫙鏈烘寚浠わ細
Java code
0: ldc #16; //string hello 2: astore_1 3: return

瀵逛簬涓婇潰铏氭嫙鏈烘寚浠わ紝鍏跺悇鑷殑鎸囦護嫻佺▼鍦ㄣ婃繁鍏ava铏氭嫙鏈恒嬭繖鏍鋒弿榪板埌(緇撳悎涓婇潰瀹炰緥)錛?/span>

ldc鎸囦護鏍煎紡錛歭dc,index
ldc鎸囦護榪囩▼錛?/span>
瑕佹墽琛宭dc鎸囦護錛宩vm棣栧厛鏌ユ壘index鎵鎸囧畾鐨勫父閲忔睜鍏ュ彛錛屽湪index鎸囧悜鐨勫父閲忔睜鍏ュ彛錛宩vm灝嗕細鏌ユ壘constant_integer_info錛宑onstant_float_info鍜宑onstant_string_info鍏ュ彛銆傚鏋滆繕娌℃湁榪欎簺鍏ュ彛錛宩vm浼氳В鏋愬畠浠傝屽浜庝笂闈㈢殑hahajvm浼氭壘鍒癱onstant_string_info鍏ュ彛錛屽悓鏃訛紝灝嗘妸鎸囧悜琚嫎鐣橲tring瀵硅薄錛堢敱瑙f瀽璇ュ叆鍙g殑榪涚▼浜х敓錛夌殑寮曠敤鍘嬪叆鎿嶄綔鏁版爤銆?/span>

astore_1鎸囦護鏍煎紡錛歛store_1
astore_1鎸囦護榪囩▼錛?/span>
瑕佹墽琛宎store_1鎸囦護錛宩vm浠庢搷浣滄暟鏍堥《閮ㄥ脊鍑轟竴涓紩鐢ㄧ被鍨嬫垨鑰卹eturnaddress綾誨瀷鍊鹼紝鐒跺悗灝嗚鍊煎瓨鍏ョ敱绱㈠紩1鎸囧畾鐨勫眬閮ㄥ彉閲忎腑,鍗沖皢寮曠敤綾誨瀷鎴栬卹eturnaddress綾誨瀷鍊煎瓨鍏ュ眬閮ㄥ彉閲?銆?/span>

return 鎸囦護鐨勮繃紼嬶細
浠庢柟娉曚腑榪斿洖錛岃繑鍥炲間負void銆?/span>

璋堜竴涓嬫垜涓漢鐞嗚В錛?/span>
浠庝笂闈㈢殑ldc鎸囦護鐨勬墽琛岃繃紼嬪彲浠ュ緱鍑猴細s鐨勫兼槸鏉ヨ嚜琚嫎鐣檚tring瀵硅薄錛堢敱瑙f瀽璇ュ叆鍙g殑榪涚▼浜х敓錛夌殑寮曠敤錛屽嵆鍙互鐞嗚В涓烘槸浠庤鎷樼暀string瀵硅薄鐨勫紩鐢ㄥ鍒惰屾潵鐨勶紝鏁呮垜涓漢鐨勭悊瑙f槸s鐨勫兼槸瀛樺湪鏍堝綋涓備笂闈㈡槸瀵逛簬s鍊煎緱鍒嗘瀽錛屾帴鐫鏄浜?hello"鍊肩殑鍒嗘瀽,鎴戜滑鐭ラ亾錛屽浜巗tring s = "hello" 鍏朵腑"hello"鍊煎湪java紼嬪簭緙栬瘧鏈熷氨紜畾涓嬫潵浜嗙殑銆傜畝鍗曚竴鐐硅錛屽氨鏄痟aha鐨勫煎湪紼嬪簭緙栬瘧鎴恈lass鏂囦歡鍚庯紝灝卞湪class鏂囦歡涓敓鎴愪簡錛堝ぇ瀹跺彲浠ョ敤ue緙栬緫鍣ㄦ垨鍏跺畠鏂囨湰緙栬緫宸ュ叿鍦ㄦ墦寮class鏂囦歡鍚庣殑瀛楄妭鐮佹枃浠朵腑鐪嬪埌榪欎釜hello鍊鹼級銆傛墽琛宩ava紼嬪簭鐨勮繃紼嬩腑錛岀涓姝ユ槸class鏂囦歡鐢熸垚錛岀劧鍚庤jvm瑁呰澆鍒板唴瀛樻墽琛屻傞偅涔坖vm瑁呰澆榪欎釜class鍒板唴瀛樹腑錛屽叾涓殑hello榪欎釜鍊鹼紝鍦ㄥ唴瀛樹腑鏄庝箞涓哄叾寮杈熺┖闂村茍瀛樺偍鍦ㄥ摢涓尯鍩熶腑鍛紵

璇村埌榪欓噷錛屾垜浠笉濡ㄥ厛鏉ヤ簡瑙d竴涓媕vm甯擱噺姹犺繖涓粨鏋勶紝銆婃繁鍏ava铏氭嫙鏈恒嬩功涓湁榪欐牱鐨勬弿榪幫細

甯擱噺姹?/span>
铏氭嫙鏈哄繀欏諱負姣忎釜琚杞界殑綾誨瀷緇存姢涓涓父閲忔睜銆傚父閲忔睜灝辨槸璇ョ被鍨嬫墍鐢ㄥ埌甯擱噺鐨勪竴涓湁搴忛泦鍜岋紝鍖呮嫭鐩存帴甯擱噺錛坰tring,integer鍜宖loating point甯擱噺錛夊拰瀵瑰叾浠栫被鍨嬶紝瀛楁鍜屾柟娉曠殑絎﹀彿寮曠敤銆傚浜巗tring甯擱噺錛屽畠鐨勫兼槸鍦ㄥ父閲忔睜涓殑銆傝宩vm涓殑甯擱噺姹犲湪鍐呭瓨褰撲腑鏄互琛ㄧ殑褰㈠紡瀛樺湪鐨勶紝瀵逛簬string綾誨瀷錛屾湁涓寮犲浐瀹氶暱搴︾殑constant_string_info琛ㄧ敤鏉ュ瓨鍌ㄦ枃瀛楀瓧絎︿覆鍊鹼紝娉ㄦ剰錛氳琛ㄥ彧瀛樺偍鏂囧瓧瀛楃涓插鹼紝涓嶅瓨鍌ㄧ鍙峰紩鐢ㄣ傝鍒拌繖閲岋紝瀵瑰父閲忔睜涓殑瀛楃涓插肩殑瀛樺偍浣嶇疆搴旇鏈変竴涓瘮杈冩槑浜嗙殑鐞嗚В浜嗐?/span>

鍦ㄤ粙緇嶅畬jvm甯擱噺姹犵殑姒傚康鍚庯紝鎺ョ潃璋堝紑濮嬫彁鍒扮殑"hello"鐨勫肩殑鍐呭瓨鍒嗗竷鐨勪綅緗傚浜巋aha鐨勫鹼紝瀹為檯涓婃槸鍦╟lass鏂囦歡琚玧vm瑁呰澆鍒板唴瀛樺綋涓茍琚紩鎿庡湪瑙f瀽ldc鎸囦護騫舵墽琛宭dc鎸囦護涔嬪墠錛宩vm灝卞凡緇忎負haha榪欎釜瀛楃涓插湪甯擱噺姹犵殑constant_string_info琛ㄤ腑鍒嗛厤浜嗙┖闂存潵瀛樺偍hello榪欎釜鍊箋傛棦鐒秇ello榪欎釜瀛楃涓插父閲忓瓨鍌ㄥ湪甯擱噺姹犱腑錛屾牴鎹婃繁鍏ava铏氭嫙鏈恒嬩功涓弿榪幫細甯擱噺姹犳槸灞炰簬綾誨瀷淇℃伅鐨勪竴閮ㄥ垎錛岀被鍨嬩俊鎭篃灝辨槸姣忎竴涓杞澆鐨勭被鍨嬶紝榪欎釜綾誨瀷鍙嶆槧鍒癹vm鍐呭瓨妯″瀷涓槸瀵瑰簲瀛樺湪浜巎vm鍐呭瓨妯″瀷鐨勬柟娉曞尯涓紝涔熷氨鏄繖涓被鍨嬩俊鎭腑鐨勫父閲忔睜姒傚康鏄瓨鍦ㄤ簬鍦ㄦ柟娉曞尯涓紝鑰屾柟娉曞尯鏄湪jvm鍐呭瓨妯″瀷涓殑鍫嗕腑鐢眏vm鏉ュ垎閰嶇殑銆傛墍浠ワ紝hello鐨勫兼槸搴旇鏄瓨鍦ㄥ爢絀洪棿涓殑銆?/span>

鑰屽浜巗tring s = new string("hello") ,瀹冪殑jvm鎸囦護錛?/span>
Java code
0: new #16; //class string 3: dup 4: ldc #18; //string hello 6: invokespecial #20; //method java/lang/string."":(ljava/lang/string;)v 9: astore_1 10: return

瀵逛簬涓婇潰铏氭嫙鏈烘寚浠わ紝鍏跺悇鑷殑鎸囦護嫻佺▼鍦ㄣ婃繁鍏ava铏氭嫙鏈恒嬭繖鏍鋒弿榪板埌(緇撳悎涓婇潰瀹炰緥)錛?/span>

new鎸囦護鏍煎紡錛歯ew indexbyte1,indexbyte2
new鎸囦護榪囩▼錛?/span>
瑕佹墽琛宯ew鎸囦護錛宩vm閫氳繃璁$畻(indextype1<<8)|indextype2鐢熸垚涓涓寚鍚戝父閲忔睜鐨勬棤絎﹀彿16浣嶇儲寮曘傜劧鍚巎vm鏍規嵁璁$畻鍑虹殑绱㈠紩鏌ユ壘甯擱噺姹犲叆鍙c傝绱㈠紩鎵鎸囧悜鐨勫父閲忔睜鍏ュ彛蹇呴』涓篶onstant_class_info銆傚鏋滆鍏ュ彛灝氫笉瀛樺湪錛岄偅涔坖vm灝嗚В鏋愯繖涓父閲忔睜鍏ュ彛錛岃鍏ュ彛綾誨瀷蹇呴』鏄被銆俲vm浠庡爢涓負鏂板璞℃槧鍍忓垎閰嶈凍澶熷ぇ鐨勭┖闂達紝騫跺皢瀵硅薄鐨勫疄渚嬪彉閲忚涓洪粯璁ゅ箋傛渶鍚巎vm灝嗘寚鍚戞柊瀵硅薄鐨勫紩鐢╫bjectref鍘嬪叆鎿嶄綔鏁版爤銆?/span>

dup鎸囦護鏍煎紡錛歞up
dup鎸囦護榪囩▼錛?/span>
瑕佹墽琛宒up鎸囦護錛宩vm澶嶅埗浜嗘搷浣滄暟鏍堥《閮ㄤ竴涓瓧闀跨殑鍐呭錛岀劧鍚庡啀灝嗗鍒跺唴瀹瑰帇鍏ユ爤銆傛湰鎸囦護鑳藉浠庢搷浣滄暟鏍堥《閮ㄥ鍒朵換浣曞崟浣嶅瓧闀跨殑鍊箋備絾緇濆涓嶈浣跨敤瀹冩潵澶嶅埗鎿嶄綔鏁版爤欏墮儴浠諱綍涓や釜瀛楅暱(long鍨嬫垨double鍨?涓殑涓涓瓧闀褲備笂闈緥涓紝鍗沖鍒跺紩鐢╫bjectref錛岃繖鏃跺湪鎿嶄綔鏁版爤瀛樺湪2涓紩鐢ㄣ?/span>

ldc鎸囦護鏍煎紡錛歭dc,index
ldc鎸囦護榪囩▼錛?/span>
瑕佹墽琛宭dc鎸囦護錛宩vm棣栧厛鏌ユ壘index鎵鎸囧畾鐨勫父閲忔睜鍏ュ彛錛屽湪index鎸囧悜鐨勫父閲忔睜鍏ュ彛錛宩vm灝嗕細鏌ユ壘constant_integer_info錛宑onstant_float_info鍜宑onstant_string_info鍏ュ彛銆傚鏋滆繕娌℃湁榪欎簺鍏ュ彛錛宩vm浼氳В鏋愬畠浠傝屽浜庝笂闈㈢殑haha,jvm浼氭壘鍒癱onstant_string_info鍏ュ彛錛屽悓鏃訛紝灝嗘妸鎸囧悜琚嫎鐣檚tring瀵硅薄錛堢敱瑙f瀽璇ュ叆鍙g殑榪涚▼浜х敓錛夌殑寮曠敤鍘嬪叆鎿嶄綔鏁版爤銆?/span>

invokespecial鎸囦護鏍煎紡錛歩nvokespecial,indextype1,indextype2
invokespecial鎸囦護榪囩▼錛氬浜庤綾昏岃█錛岃鎸囦護鏄敤鏉ヨ繘琛屽疄渚嬪垵濮嬪寲鏂規硶鐨勮皟鐢ㄣ傞壌浜庤鎸囦護綃囧箙錛屽叿浣撳彲浠ユ煡闃呫婃繁鍏ava铏氭嫙鏈恒嬩腑鎻忚堪銆備笂闈緥瀛愪腑錛屽嵆閫氳繃鍏朵腑涓涓紩鐢ㄨ皟鐢╯tring綾葷殑鏋勯犲櫒錛屽垵濮嬪寲瀵硅薄瀹炰緥錛岃鍙︿竴涓浉鍚岀殑寮曠敤鎸囧悜榪欎釜琚垵濮嬪寲鐨勫璞″疄渚嬶紝鐒跺悗鍓嶄竴涓紩鐢ㄥ脊鍑烘搷浣滄暟鏍堛?/span>

astore_1鎸囦護鏍煎紡錛歛store_1
astore_1鎸囦護榪囩▼錛?/span>
瑕佹墽琛宎store_1鎸囦護錛宩vm浠庢搷浣滄暟鏍堥《閮ㄥ脊鍑轟竴涓紩鐢ㄧ被鍨嬫垨鑰卹eturnaddress綾誨瀷鍊鹼紝鐒跺悗灝嗚鍊煎瓨鍏ョ敱绱㈠紩1鎸囧畾鐨勫眬閮ㄥ彉閲忎腑,鍗沖皢寮曠敤綾誨瀷鎴栬卹eturnaddress綾誨瀷鍊煎瓨鍏ュ眬閮ㄥ彉閲?銆?/span>

return 鎸囦護鐨勮繃紼?
浠庢柟娉曚腑榪斿洖錛岃繑鍥炲間負void銆?/span>

瑕佹墽琛宎store_1鎸囦護錛宩vm浠庢搷浣滄暟鏍堥《閮ㄥ脊鍑轟竴涓紩鐢ㄧ被鍨嬫垨鑰卹eturnaddress綾誨瀷鍊鹼紝鐒跺悗灝嗚鍊煎瓨鍏ョ敱绱㈠紩1鎸囧畾鐨勫眬閮ㄥ彉閲忎腑,鍗沖皢寮曠敤綾誨瀷鎴栬卹eturnaddress綾誨瀷鍊煎瓨鍏ュ眬閮ㄥ彉閲?銆?/span>

閫氳繃涓婇潰6涓寚浠わ紝鍙互鐪嬪嚭錛宻tring s = new string("hello");涓殑hello瀛樺偍鍦ㄥ爢絀洪棿涓紝鑰宻鍒欐槸鍦ㄦ搷浣滄暟鏍堜腑銆?/span>
涓婇潰鏄s鍜宧aha鍊肩殑鍐呭瓨鎯呭喌鐨勫垎鏋愬拰鐞嗚В錛涢偅瀵逛簬string s = new string("hello");璇彞,鍒板簳鍒涘緩浜嗗嚑涓璞″憿?
鎴戠殑鐞嗚В錛氳繖閲?hello"鏈韓灝辨槸甯擱噺姹犱腑鐨勪竴涓璞★紝鑰屽湪榪愯鏃舵墽琛宯ew string()鏃訛紝灝嗗父閲忔睜涓殑瀵硅薄澶嶅埗涓浠芥斁鍒板爢涓紝騫朵笖鎶婂爢涓殑榪欎釜瀵硅薄鐨勫紩鐢ㄤ氦緇檚鎸佹湁銆傛墍浠ヨ繖鏉¤鍙ュ氨鍒涘緩浜?涓猻tring瀵硅薄銆?/span>


涓嬮潰鏄竴浜泂tring鐩稿叧鐨勫父瑙侀棶棰橈細
String涓殑final鐢ㄦ硶鍜岀悊瑙?/span>
final stringbuffer a = new stringbuffer("111");
final stringbuffer b = new stringbuffer("222");
a=b;//姝ゅ彞緙栬瘧涓嶉氳繃
final stringbuffer a = new stringbuffer("111");
a.append("222");//緙栬瘧閫氳繃
鍙錛宖inal鍙寮曠敤鐨?鍊?(鍗沖唴瀛樺湴鍧)鏈夋晥錛屽畠榪嬌寮曠敤鍙兘鎸囧悜鍒濆鎸囧悜鐨勯偅涓璞★紝鏀瑰彉瀹冪殑鎸囧悜浼氬鑷寸紪璇戞湡閿欒銆傝嚦浜庡畠鎵鎸囧悜鐨勫璞$殑鍙樺寲錛宖inal鏄笉璐熻矗鐨勩?/span>


String 甯擱噺姹犻棶棰樼殑鍑犱釜渚嬪瓙
涓嬮潰鏄嚑涓父瑙佷緥瀛愮殑姣旇緝鍒嗘瀽鍜岀悊瑙o細
銆?銆?/span>
Java code
String a = "a1"; String b = "a" + 1; System.out.println((a == b)); //result = true String a = "atrue"; String b = "a" + "true"; System.out.println((a == b)); //result = true String a = "a3.4"; String b = "a" + 3.4; System.out.println((a == b)); //result = true

鍒嗘瀽錛歫vm瀵逛簬瀛楃涓插父閲忕殑"+"鍙瘋繛鎺ワ紝灝嗙▼搴忕紪璇戞湡錛宩vm灝卞皢甯擱噺瀛楃涓茬殑"+"榪炴帴浼樺寲涓鴻繛鎺ュ悗鐨勫鹼紝鎷?a" + 1鏉ヨ錛岀粡緙栬瘧鍣ㄤ紭鍖栧悗鍦╟lass涓氨宸茬粡鏄痑1銆傚湪緙栬瘧鏈熷叾瀛楃涓插父閲忕殑鍊煎氨紜畾涓嬫潵錛屾晠涓婇潰紼嬪簭鏈緇堢殑緇撴灉閮戒負true銆?/span>

銆?銆?/span>
Java code
String a = "ab"; String bb = "b"; String b = "a" + bb; System.out.println((a == b)); //result = false

鍒嗘瀽錛歫vm瀵逛簬瀛楃涓插紩鐢紝鐢變簬鍦ㄥ瓧絎︿覆鐨?+"榪炴帴涓紝鏈夊瓧絎︿覆寮曠敤瀛樺湪錛岃屽紩鐢ㄧ殑鍊煎湪紼嬪簭緙栬瘧鏈熸槸鏃犳硶紜畾鐨勶紝鍗?a" + bb鏃犳硶琚紪璇戝櫒浼樺寲錛屽彧鏈夊湪紼嬪簭榪愯鏈熸潵鍔ㄦ佸垎閰嶅茍灝嗚繛鎺ュ悗鐨勬柊鍦板潃璧嬬粰b銆傛墍浠ヤ笂闈㈢▼搴忕殑緇撴灉涔熷氨涓篺alse銆?/span>

銆?銆?/span>
Java code
String a = "ab"; final String bb = "b"; String b = "a" + bb; System.out.println((a == b)); //result = true

鍒嗘瀽錛氬拰[3]涓敮涓涓嶅悓鐨勬槸bb瀛楃涓插姞浜唂inal淇グ錛屽浜巉inal淇グ鐨勫彉閲忥紝瀹冨湪緙栬瘧鏃惰瑙f瀽涓哄父閲忓肩殑涓涓湰鍦版嫹璐濆瓨鍌ㄥ埌鑷繁鐨勫父閲忔睜涓垨宓屽叆鍒板畠鐨勫瓧鑺傜爜嫻佷腑銆傛墍浠ユ鏃剁殑"a" + bb鍜?a" + "b"鏁堟灉鏄竴鏍風殑銆傛晠涓婇潰紼嬪簭鐨勭粨鏋滀負true銆?/span>

銆?銆?/span>
Java code
String a = "ab"; final String bb = getbb(); String b = "a" + bb; System.out.println((a == b)); //result = false private static string getbb() { return "b"; }

鍒嗘瀽錛歫vm瀵逛簬瀛楃涓插紩鐢╞b錛屽畠鐨勫煎湪緙栬瘧鏈熸棤娉曠‘瀹氾紝鍙湁鍦ㄧ▼搴忚繍琛屾湡璋冪敤鏂規硶鍚庯紝灝嗘柟娉曠殑榪斿洖鍊煎拰"a"鏉ュ姩鎬佽繛鎺ュ茍鍒嗛厤鍦板潃涓篵錛屾晠涓婇潰紼嬪簭鐨勭粨鏋滀負false銆?/span>

閫氳繃涓婇潰4涓緥瀛愬彲浠ュ緱鍑哄緱鐭ワ細
string s = "a" + "b" + "c";   
灝辯瓑浠蜂簬string s = "abc";   

string a = "a";   
string b = "b";   
string c = "c";   
string s = a + b + c;   
榪欎釜灝變笉涓鏍蜂簡錛屾渶緇堢粨鏋滅瓑浜庯細   
stringbuffer temp = new stringbuffer();   
temp.append(a).append(b).append(c);   
string s = temp.tostring();
鐢變笂闈㈢殑鍒嗘瀽緇撴灉錛屽彲灝變笉闅炬帹鏂嚭string 閲囩敤榪炴帴榪愮畻絎︼紙+錛夋晥鐜囦綆涓嬪師鍥犲垎鏋愶紝褰㈠榪欐牱鐨勪唬鐮侊細
Java code
public class test { public static void main (String args[]) { String s = null; for (int i = 0; i < 100; i++) { s += "a"; } } }

姣忓仛涓嬈?+ 灝變駭鐢熶釜stringbuilder瀵硅薄錛岀劧鍚巃ppend鍚庡氨鎵旀帀銆備笅嬈″驚鐜啀鍒拌揪鏃墮噸鏂頒駭鐢熶釜stringbuilder瀵硅薄錛岀劧鍚?append 瀛楃涓詫紝濡傛寰幆鐩磋嚦緇撴潫銆?濡傛灉鎴戜滑鐩存帴閲囩敤 stringbuilder 瀵硅薄榪涜 append 鐨勮瘽錛屾垜浠彲浠ヨ妭鐪?n - 1 嬈″垱寤哄拰閿姣佸璞$殑鏃墮棿銆傛墍浠ュ浜庡湪寰幆涓榪涜瀛楃涓茶繛鎺ョ殑搴旂敤錛屼竴鑸兘鏄敤stringbuffer鎴杝tringbulider瀵硅薄鏉ヨ繘琛宎ppend鎿嶄綔銆?/span>

string瀵硅薄鐨刬ntern鏂規硶鐞嗚В鍜屽垎鏋愶細
Java code
public class test4 { private static String a = "ab"; public static void main (String[] args){ String s1 = "a"; String s2 = "b"; String s = s1 + s2; System.out.println(s == a);//false System.out.println(s.intern() == a);//true } }

榪欓噷鐢ㄥ埌java閲岄潰鏄竴涓父閲忔睜鐨勯棶棰樸傚浜巗1+s2鎿嶄綔錛屽叾瀹炴槸鍦ㄥ爢閲岄潰閲嶆柊鍒涘緩浜嗕竴涓柊鐨勫璞?s淇濆瓨鐨勬槸榪欎釜鏂板璞″湪鍫嗙┖闂寸殑鐨勫唴瀹癸紝鎵浠涓巃鐨勫兼槸涓嶇浉絳夌殑銆傝屽綋璋冪敤s.intern()鏂規硶錛屽嵈鍙互榪斿洖s鍦ㄥ父閲忔睜涓殑鍦板潃鍊鹼紝鍥犱負a鐨勫煎瓨鍌ㄥ湪甯擱噺姹犱腑錛屾晠s.intern鍜宎鐨勫肩浉絳夈?br />


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鍐呭瓨涓嶈凍 java.lang.OutOfMemoryError: Java heap spacehttp://m.tkk7.com/dongond/archive/2010/09/23/332679.html杞誨竼鍚戝崡杞誨竼鍚戝崡Thu, 23 Sep 2010 04:45:00 GMThttp://m.tkk7.com/dongond/archive/2010/09/23/332679.htmlhttp://m.tkk7.com/dongond/comments/332679.htmlhttp://m.tkk7.com/dongond/archive/2010/09/23/332679.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/332679.htmlhttp://m.tkk7.com/dongond/services/trackbacks/332679.html闃呰鍏ㄦ枃

杞誨竼鍚戝崡 2010-09-23 12:45 鍙戣〃璇勮
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鍏充簬GridBagLayout緗戠粶涓婁竴綃囧緢濂界殑鏂囩珷http://m.tkk7.com/dongond/archive/2010/05/01/319864.html杞誨竼鍚戝崡杞誨竼鍚戝崡Sat, 01 May 2010 14:26:00 GMThttp://m.tkk7.com/dongond/archive/2010/05/01/319864.htmlhttp://m.tkk7.com/dongond/comments/319864.htmlhttp://m.tkk7.com/dongond/archive/2010/05/01/319864.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/319864.htmlhttp://m.tkk7.com/dongond/services/trackbacks/319864.html闃呰鍏ㄦ枃

杞誨竼鍚戝崡 2010-05-01 22:26 鍙戣〃璇勮
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鍏充簬鏈夋ā寮忓拰鏃犳ā寮忓璇濇http://m.tkk7.com/dongond/archive/2010/04/07/317661.html杞誨竼鍚戝崡杞誨竼鍚戝崡Wed, 07 Apr 2010 12:25:00 GMThttp://m.tkk7.com/dongond/archive/2010/04/07/317661.htmlhttp://m.tkk7.com/dongond/comments/317661.htmlhttp://m.tkk7.com/dongond/archive/2010/04/07/317661.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/317661.htmlhttp://m.tkk7.com/dongond/services/trackbacks/317661.html
闈炴ā鎬佸璇濇涓庢ā鎬佸璇濇鐩告瘮鏈変笅鍒椾笉鍚屼箣澶勶細 
闈炴ā鎬佸璇濇鐨勬ā鏉垮繀欏誨叿鏈塚isible椋庢牸錛屽惁鍒欏璇濇灝嗕笉鍙錛岃屾ā鎬佸璇濇鍒欐棤闇 
璁劇疆璇ラ」椋庢牸銆傛洿淇濋櫓鐨勫姙娉曟槸璋冪敤CWnd::ShowWindow(SW_SHOW)鏉ユ樉紺哄璇濇錛岃屼笉綆?nbsp;
瀵硅瘽妗嗘槸鍚﹀叿鏈塚isible椋庢牸銆?nbsp;
闈炴ā鎬佸璇濇瀵硅薄鏄敤new鎿嶄綔絎﹀湪鍫嗕腑鍔ㄦ佸垱寤虹殑錛岃屼笉鏄互鎴愬憳鍙橀噺鐨勫艦寮忓祵鍏ュ埌鍒?nbsp;
鐨勫璞′腑鎴栦互灞閮ㄥ彉閲忕殑褰㈠紡鏋勫緩鍦ㄥ爢鏍堜笂銆傞氬父搴斿湪瀵硅瘽妗嗙殑鎷ユ湁鑰呯獥鍙g被鍐呭0鏄庝竴 
涓寚鍚戝璇濇綾葷殑鎸囬拡鎴愬憳鍙橀噺錛岄氳繃璇ユ寚閽堝彲璁塊棶瀵硅瘽妗嗗璞°?nbsp;
閫氳繃璋冪敤CDialog::Create鍑芥暟鏉ュ惎鍔ㄥ璇濇錛岃屼笉鏄疌Dialog::DoModal錛岃繖鏄ā鎬佸璇?nbsp;
妗嗙殑鍏抽敭鎵鍦ㄣ傜敱浜嶤reate鍑芥暟涓嶄細鍚姩鏂扮殑娑堟伅寰幆錛屽璇濇涓庡簲鐢ㄧ▼搴忓叡鐢ㄥ悓涓涓?nbsp;
娑堟伅寰幆錛岃繖鏍峰璇濇灝變笉浼氬瀯鏂敤鎴風殑杈撳叆銆侰reate鍦ㄦ樉紺轟簡瀵硅瘽妗嗗悗灝辯珛鍗寵繑鍥烇紝 
鑰孌oModal鏄湪瀵硅瘽妗嗚鍏抽棴鍚庢墠榪斿洖鐨勩備紬鎵鍛ㄧ煡錛屽湪MFC紼嬪簭涓紝紿楀彛瀵硅薄鐨勭敓瀛樻湡 
搴旈暱浜庡搴旂殑紿楀彛錛屼篃灝辨槸璇達紝涓嶈兘鍦ㄦ湭鍏抽棴灞忓箷涓婄獥鍙g殑鎯呭喌涓嬪厛鎶婂搴旂殑紿楀彛瀵硅薄 
鍒犻櫎鎺夈傜敱浜庡湪Create榪斿洖鍚庯紝涓嶈兘紜畾瀵硅瘽妗嗘槸鍚﹀凡鍏抽棴錛岃繖鏍蜂篃灝辨棤娉曠‘瀹氬璇濇 
瀵硅薄鐨勭敓瀛樻湡錛屽洜姝ゅ彧濂藉湪鍫嗕腑鏋勫緩瀵硅瘽妗嗗璞★紝鑰屼笉鑳戒互灞閮ㄥ彉閲忕殑褰㈠紡鏉ユ瀯寤轟箣銆?nbsp;
 
蹇呴』璋冪敤CWnd::DestroyWindow鑰屼笉鏄疌Dialog::EndDialog鏉ュ叧闂潪妯℃佸璇濇銆傝皟鐢– 
Wnd::DestroyWindow鏄洿鎺ュ垹闄ょ獥鍙g殑涓鑸柟娉曘傜敱浜庣己鐪佺殑CDialog::OnOK鍜孋Dialog 
:OnCancel鍑芥暟鍧囪皟鐢‥ndDialog錛屾晠紼嬪簭鍛樺繀欏葷紪鍐欒嚜宸辯殑OnOK鍜孫nCancel鍑芥暟騫朵笖鍦?nbsp;
鍑芥暟涓皟鐢―estroyWindow鏉ュ叧闂璇濇銆?nbsp;
鍥犱負鏄敤new鎿嶄綔絎︽瀯寤洪潪妯℃佸璇濇瀵硅薄錛屽洜姝ゅ繀欏誨湪瀵硅瘽妗嗗叧闂悗錛岀敤delete鎿嶄綔絎?nbsp;
鍒犻櫎瀵硅瘽妗嗗璞°傚湪灞忓箷涓婁竴涓獥鍙h鍒犻櫎鍚庯紝妗嗘灦浼氳皟鐢–Wnd::PostNcDestroy錛岃繖鏄?nbsp;
涓涓櫄鎷熷嚱鏁幫紝紼嬪簭鍙互鍦ㄨ鍑芥暟涓畬鎴愬垹闄ょ獥鍙e璞$殑宸ヤ綔錛屽叿浣撲唬鐮佸涓?nbsp;
void CModelessDialog::PostNcDestroy 

delete this; //鍒犻櫎瀵硅薄鏈韓 

榪欐牱錛屽湪鍒犻櫎灞忓箷涓婄殑瀵硅瘽妗嗗悗錛屽璇濇瀵硅薄灝嗚鑷姩鍒犻櫎銆傛嫢鏈夎呭璞″氨涓嶅繀鏄懼紡鐨?nbsp;
璋冪敤delete鏉ュ垹闄ゅ璇濇瀵硅薄浜嗐?nbsp;
蹇呴』鏈変竴涓爣蹇楄〃鏄庨潪妯℃佸璇濇鏄惁鏄墦寮鐨勩傝繖鏍峰仛鐨勫師鍥犳槸鐢ㄦ埛鏈夊彲鑳藉湪鎵撳紑涓 
涓ā鎬佸璇濇鐨勬儏鍐典笅錛屽張涓嬈¢夋嫨鎵撳紑鍛戒護銆傜▼搴忔牴鎹爣蹇楁潵鍐沖畾鏄墦寮涓涓柊鐨勫 
璇濇錛岃繕鏄粎浠呮妸鍘熸潵鎵撳紑鐨勫璇濇嬋媧匯傞氬父鍙互鐢ㄦ嫢鏈夎呯獥鍙d腑鐨勬寚鍚戝璇濇瀵硅薄 
鐨勬寚閽堜綔涓鴻繖縐嶆爣蹇楋紝褰撳璇濇鍏抽棴鏃訛紝緇欒鎸囬拡璧婲ULL鍊鹼紝浠ヨ〃鏄庡璇濇瀵硅薄宸蹭笉瀛?nbsp;
鍦ㄤ簡銆?


杞誨竼鍚戝崡 2010-04-07 20:25 鍙戣〃璇勮
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錛堣漿錛変粠File綾誨紑濮媕ava IO 緋葷粺浠嬬粛http://m.tkk7.com/dongond/archive/2010/03/30/316883.html杞誨竼鍚戝崡杞誨竼鍚戝崡Mon, 29 Mar 2010 17:03:00 GMThttp://m.tkk7.com/dongond/archive/2010/03/30/316883.htmlhttp://m.tkk7.com/dongond/comments/316883.htmlhttp://m.tkk7.com/dongond/archive/2010/03/30/316883.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/316883.htmlhttp://m.tkk7.com/dongond/services/trackbacks/316883.html闃呰鍏ㄦ枃

杞誨竼鍚戝崡 2010-03-30 01:03 鍙戣〃璇勮
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鍒嗕韓涓涓狫Tree瀹炵幇璧勬簮綆$悊鍣ㄧ殑紼嬪簭浠g爜http://m.tkk7.com/dongond/archive/2010/03/30/316882.html杞誨竼鍚戝崡杞誨竼鍚戝崡Mon, 29 Mar 2010 16:58:00 GMThttp://m.tkk7.com/dongond/archive/2010/03/30/316882.htmlhttp://m.tkk7.com/dongond/comments/316882.htmlhttp://m.tkk7.com/dongond/archive/2010/03/30/316882.html#Feedback0http://m.tkk7.com/dongond/comments/commentRss/316882.htmlhttp://m.tkk7.com/dongond/services/trackbacks/316882.html闃呰鍏ㄦ枃

杞誨竼鍚戝崡 2010-03-30 00:58 鍙戣〃璇勮
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