1銆乯ava鍏ラ棬
涓�銆佸瓧绗︿覆绫诲瀷鍙峰瀷鍙蜂负浠�涓嶈繕鏄痜inal鐨勩��
浜屻�丠ash鍦板浘鐨勪唬鐮侊紝瀹炵幇鐞嗚锛屽簳灞傜粨鏋勩��
涓夈�佽璁叉偍鐭ラ亾鐨勫嚑涓�涓�涓猨ava闆嗗悎绫诲瀷鍙峰瀷鍙凤細list銆乻et銆乹ueue銆佸湴鍥惧疄鐜扮被鍨嬪彿鍨嬪彿鍜�傘�傘��
鍥涖�佹弿杩颁竴涓婣rrayList鎴朙inkedList鍚勮嚜瀹炵幇鎴栦笉涓�鏍�
浜斻�乯ava涓殑闃熷垪鍖呮嫭閭ｇ锛屾湁浠�涓嶄笉涓�鏍枫��
鍏�佸弽灏勪腑锛孋lass.forName鎴朿lassloader鐨勪笉涓�鏍�
涓冦�乯ava涓冦�乯ava鍏殑鏂扮壒鎬�(baidu闂殑,濂紹T)
鍏�乯ava鏁板瓧瀛楃粍鎴栭摼涔︿袱绉嶇粨鏋勭殑鎿嶄綔鏁堢泭锛屽瓨鍦ㄩ偅绉嶆儏鍐典笅(鐢辨渶鍒濆紑澶达紝鐢辩粨灞�寮�澶达紝鐢变腑闂村紑澶�)锛岄偅绉嶆搷浣�(鎻掑叆锛屾煡鎵撅紝鍏抽棴)鐨勬晥鐩婇珮
涔濄�乯ava涓瓨娉勫厜鐨勯棶绛旈璋冩煡瀹氫綅锛歫鍦板浘锛宩stack鐨勪娇瑕佺瓑绛�
鍗併�佸瓧绗︿覆銆佸瓧绗︿覆builder銆佸瓧绗︿覆buffer涓嶄竴鏍�
鍗佷竴銆乭ashtable鎴杊ash鍦板浘鐨勪笉涓�鏍�
鍗佷簩銆佷笉姝ｅ父鐨勭粨鏋勶紝杩愯涓笉姝ｅ父鎴栦笉杩愯涓笉姝ｅ父锛屽悇涓句竴涓�涓緥瀛�
鍗佷笁銆佸瓧绗︿覆 a= 鈥渁bc鈥� 瀛楃涓� b = "abc" 瀛楃涓� c = new 瀛楃涓�("abc") 瀛楃涓� d = "ab" + "c" .浠栦滑涔嬮棿瑕� == 姣旇緝鐨勭粨鏋�
鍗佸洓銆佸瓧绗︿覆 绫诲瀷鍙峰瀷鍙风殑甯歌鏂规硶
鍗佷簲銆乯ava 鐨勫紩瑕佺被鍨嬪彿鍨嬪彿鍨嬪彿鏈夊摢鍑犵
鍗佸叚銆佹娊璞＄被鍨嬪彿鍨嬪彿鎴栨帴鍙ｇ殑涓嶄竴鏍�
鍗佷竷銆乯ava鐨勫叆闂ㄧ被鍨嬪彿鍨嬪彿鍨嬪彿鎴栧瓧鑺傚ぇ灏忋��
鍗佸叓銆丠ashtable,Hash鍦板浘,Co鍗楁槍澶уrrentHash鍦板浘 搴曞眰瀹炵幇鐞嗚涓庣嚎绋嬪钩瀹夐棶绛旈锛堝缓璁啛鎮� jdk 浠ｇ爜锛屾墠鑳界敱瀹瑰洖搴旓級
鍗佷節銆佸儚鏋滀笉璁╂偍瑕乯ava Jdk鎻愪緵鐨勫伐鍏凤紝鎮ㄦ�庢牱鏍峰疄鐜颁竴涓�涓�涓湴鍥撅紝鎮ㄦ�庝笉寮勩�傝浜嗗ソ涔咃紝璁蹭簡Hash鍦板浘浠ｇ爜锛屽儚鏋滄垜寮勶紝灏变細鍊熼壌Hash鍦板浘鐨勭悊璁猴紝璁蹭簡涓�閫欻ash鍦板浘瀹炵幇
浜屽崄銆� Hash鍐茬獊鎬庝笉鍔烇紵閭ｇ鍔炴暎鍒楀啿绐佺殑鏂规硶锛�
浜屽崄涓�銆丠ash鍦板浘鍐茬獊寰堝帀瀹筹紝鏈�宸�т环姣旓紝鎮ㄤ細鎬庝笉鍔�?鐢監锛坣锛夊姞寮鸿嚦log锛坣锛夊挴锛岃浜屽弶鎺掑簭鏈ㄧ殑鎬濊矾璁蹭簡涓�閫�
浜屽崄浜屻�乺ehash
浜屽崄涓夈�乭ashCode() 涓� equals() 鍒涘缓璁℃槸鏂规硶銆佹柟娉曟�庝笉閲嶅啓
2銆乯ava 杈撳叆杈撳嚭
涓�銆佽璁茶緭鍏ヨ緭鍑洪噷闈㈢殑甯歌绫诲瀷鍙峰瀷鍙凤紝瀛楄妭娴併�佸瓧绗︽祦銆佹帴鍙ｃ�佸疄鐜扮被鍨嬪彿鍨嬪彿銆佹柟娉曢樆濉炪��
浜屻�佽璁睳杈撳叆杈撳嚭銆�
涓夈�佸瓧绗︿覆 缂栫爜UTF-鍏� 鎴朑BK鐨勪笉涓�鏍�?
鍥涖�佷粈涓嶄腑鍊欎娇瑕佸瓧鑺傛祦銆佷粈涓嶄腑鍊欎娇瑕佸瓧绗︽祦?
浜斻�侀�掑綊瀛︿範鍙栨枃浠跺す涓嬬殑鏂囦欢锛屼唬鐮佹�庝笉瀹炵幇
3銆乯ava Web
涓�銆乻ess杈撳叆杈撳嚭n鎴朿ookie鐨勪笉涓�鏍锋垨鑱旂郴锛宻ess杈撳叆杈撳嚭n鐨勭敓鍛藉懆鏈燂紝澶氫竴涓�涓湇浜嬮儴缃蹭腑sess杈撳叆杈撳嚭n绠＄悊銆�
浜屻�乻ervlet鐨勪竴浜涘叧浜庨棶绛旈
涓夈�亀ebservi鍐呭瓨淇敼鍣ㄥ叧浜庨棶绛旈
鍥涖�乯dbc閾撅紝forname鏂规鐨勬祦绋嬶紝鎬庝笉澹版槑浣胯涓�涓�涓�涓簨浜嬨�備妇渚嬪苟璇︾粏浠ｇ爜
浜斻�佹湭妗嗘灦涓嬮厤缃畐eb.xml鐨勪富瑕侀厤缃腑瀹�
鍏�乯sp鎴杝ervlet鐨勪笉涓�鏍�
4銆丣VM
涓�銆乯ava鐨勪腑瀛樻ā鍨嬪彿浠ヤ笌GC璁℃槸鏂规硶
浜屻�乯vm鎬т环姣旇皟浼橀兘寮勪簡浠�涓�
涓夈�佷粙缁岼VM涓竷涓�涓�涓幓鍩燂紝涔嬪悗灏嗘瘡涓�涓�涓幓鍩熷彲鑳介�犳垚涓瓨鐨勬孩鍑虹殑鎯呭喌璁叉槑
鍥涖�佷粙缁岹C 鎴朑C Root涓嶆甯稿紩瑕併��
浜斻�佹�庢牱鏍风敱classload 鍔犺浇鏂规锛屽姞杞藉埗搴﹁寮�鍘伙紝鐢卞簲鐢ㄧ▼搴忚繍琛屼腑鏁板瓧瀛楁嵁鍘伙紝璁茶嚦涓瓨鍒嗛厤锛岃鑷冲瓧绗︿覆甯搁噺姹狅紝璁茶嚦JVM鍨冨溇鍥炴敹鍒跺害锛岃鏄柟娉曪紝hotspot銆傚弽姝ｈ繕鏄悇绉嶅欢闀�
鍏�乯vm 鍍忎綍鍒嗛厤鐩存帴涓瓨锛� new 鐩爣鍍忎綍涓嶅垎閰嶅瓨鍦ㄥ爢鑰岃繕鏄爤涓婏紝甯搁噺姹犲垎鏋�
涓冦�佹暟瀛楀瓧缁勫澶ф斁瀛樺湪 JVM 鑰佸勾浠ｏ紙涓嶅彧杩樻槸璁剧疆 PretenureSizeThreshold 锛岄棶閫氬父澶氬ぇ锛屾病鏈夊紕杩囦竴闂究鐭ワ級
鍏�佽�佸勾浠ｄ腑鏁板瓧瀛楃粍鐨勮闂柟妗�
涔濄�丟C 璁℃槸鏂规硶锛屾案鎭掍唬鐩爣鍍忎綍 GC 锛� GC 鏈夌幆鎬庝笉鍔�
鍗併�佽皝浼氫负 GC 锛屼粈涓嶄腑鍊� GC
鍗佷竴銆佸儚鏋滈渶瑕佷笉涓� GC 鎬庝笉鍔�
鍗佷簩銆佸儚鏋滈渶瑕佸瓨鍦� GC 涓敓瀛� 涓� 娆℃�庝笉鍔�
5銆佸紑婧愭鏋�
涓�銆乭ibernate鎴杋batis鐨勪笉涓�鏍�
浜屻�佽璁瞞ybatis鐨勯摼姹犮��
涓夈�乻pring妗嗘灦涓渶瑕佸紩瑕侀偅绉峧ar鍖咃紝浠ヤ笌杩欎簺jar鍖呯殑瑕侀��
鍥�. springMVC鐨勭悊璁�
浜斻�乻pringMVC娉ㄨВ鐨勬剰鎬�
鍏�乻pring涓璪eanFactory鎴朅pplicat杈撳叆杈撳嚭nContext鐨勮仈绯绘垨涓嶄竴鏍�
涓冦�乻pring娉ㄥ叆鐨勫嚑绉嶆柟妗堬紙寰幆娉ㄥ叆锛�
鍏�乻pring鍍忎綍瀹炵幇浜嬬墿绠＄悊鐨�
涔濄�乻pring杈撳叆杈撳嚭C
鍗併�乻pring AOP鐨勭悊璁�
鍗佷竴銆乭ibernate涓殑涓�绾ф垨浜岀骇缂撳瓨鐨勪娇瑕佹柟妗堜互涓庝笉涓�鏍风悊璁猴紙Lazy-Load鐨勭悊瑙ｏ級
鍗佷簩銆丠ibernate鐨勭悊璁轰綋绯绘灦鏋勶紝浜斿ぇ鏍稿績鎺ュ彛锛孒ibernate鐩爣鐨�3绉嶇姸鎬佸彉鎴愶紝浜嬩簨绠＄悊銆�
6銆佸绾跨▼
涓�銆乯ava鍒涘缓寤虹嚎绋嬩互鍚庯紝鐩存帴璋冭start()鏂规硶鎴杛un()鐨勪笉涓�鏍�
浜屻�佸父瑕佺殑绾跨▼姹犳ā寮忎互涓庝笉涓�鏍风嚎绋嬫睜鐨勪娇瑕佸満鏅�
涓夈�乶ewFixedThreadPool姝ょ绾跨▼姹犲儚鏋滅嚎绋嬫暟瀛楀瓧杈捐嚦鏈�澶у�煎悗浼氭�庝笉鍔烇紝搴曞眰鐞嗚銆�
鍥涖�佸绾跨▼涔嬮棿閫氫俊鐨勫悓姝ラ棶绛旈锛宻ynchronized閿佸畾鐨勮繕鏄洰鏍囷紝琛嶄几鎴杝ynchronized鍏充簬澶氱殑璇︾粏闂瓟棰橈紝渚嬪儚鍚屼竴涓�涓�涓被鍨嬪彿鍨嬪彿涓嶄竴鏍锋柟娉曞寘鎷瑂ynchronized閿佸畾锛屼竴涓�涓�涓洰鏍囪繕鏄惁鍙互鍚屼腑璁块棶銆傛垨鑰呬竴涓�涓�涓被鍨嬪彿鍨嬪彿鐨剆tatic鏋勯�犳柟娉曞姞涓妔ynchronized浠ュ悗鐨勯攣瀹氱殑褰卞搷銆�
浜斻�佷簡瑙ｅ彲閲嶅叆閿佸畾鐨勫惈涔夛紝浠ヤ笌Reentrant閿� 鎴杝ynchronized鐨勪笉涓�鏍�
鍏�佸悓姝ョ殑鏁板瓧瀛楁嵁缁撴瀯锛屼緥鍍廲o鍗楁槍澶уrrentHash鍦板浘鐨勪唬鐮佺悊瑙ｄ互涓庝腑閮ㄥ疄鐜扮悊璁猴紝涓轰粈涓嶄粬杩樻槸鍚屾鐨勪笖鏁堢泭楂�
涓冦�乤tomicinteger鎴杤olatile绛夌嚎绋嬪钩瀹夋搷浣滅殑鍏抽敭瀛楃殑鐞嗚В鎴栦娇瑕�
鍏�佺嚎绋嬮棿閫氫俊锛寃ait鎴杗otify
涔濄�佸畾涓嚎绋嬬殑浣胯
鍗併�佸満鏅細瀛樺湪涓�涓�涓�涓富绾跨▼涓紝瑕佹眰鏈夊ぇ閲�(澶氬)瀛愮嚎绋嬭繍琛屽畬鎴愪互鍚庯紝涓荤嚎绋嬫墠杩愯瀹屾垚鎴愩�傚绉嶆柟妗堬紝鑰冭檻鏁堢泭銆�
鍗佷竴銆佽繘绋嬫垨绾跨▼鐨勪笉涓�鏍�
鍗佷簩銆佷粈涓嶅彨绾跨▼骞冲畨锛熶妇渚嬭鏄�
鍗佷笁銆佺嚎绋嬬殑鍑犵鐘舵��
鍗佸洓銆佸苟鍙戙�佸悓姝ョ殑鎺ュ彛鎴栨柟娉�
鍗佷簲銆丠ash鍦板浘 杩樻槸鍚︾嚎绋嬪钩瀹夛紝涓哄暐涓嶅钩瀹夈�� Co鍗楁槍澶уrrentHash鍦板浘锛岀嚎绋嬪钩瀹夛紝涓哄暐骞冲畨銆傚簳灞傚疄鐜拌繕鏄�庝笉鏍风殑銆�
鍗佸叚銆丣.U.C涓嬬殑甯歌绫诲瀷鍙峰瀷鍙风殑浣胯銆� ThreadPool鐨勬繁鍏ヨ闂紱 B閿乮ngQueue鐨勪娇瑕併�傦紙take锛宲oll鐨勪笉涓�鏍凤紝put锛宱ffer鐨勪笉涓�鏍凤級锛涚瀛愮被鍨嬪彿鍨嬪彿鐨勫疄鐜般��
鍗佷竷銆佺畝鍗曚粙缁嶄笅澶氱嚎绋嬬殑鎯呭喌锛岀敱鍒涘缓涓�涓�涓�涓嚎绋嬪紑澶淬�備箣鍚庢�庝笉鎺у埗鍚屾绋嬪簭锛屽绾跨▼甯歌鐨勬柟娉曟垨缁撴瀯
鍗佸叓銆乿olatile鐨勭悊瑙�
鍗佷節銆佸疄鐜板绾跨▼鏈夊嚑绉嶆柟妗堬紝澶氱嚎绋嬪悓姝ユ�庝笉寮勶紝璁茶鍑犱竴涓�涓嚎绋嬮噷甯歌鐨勬柟娉�
7銆佺綉缁滈�氫俊
涓�銆乭ttp杩樻槸鏈姸鎬侀�氫俊锛宧ttp鐨勭敵璇锋柟妗堟湁閭ｇ锛屽彲浠ユ�庢牱鏍峰畾涔夋柊鐨勭敵璇锋柟妗堜笉銆�
浜屻�乻ocket閫氫俊锛屼互涓庨暱閾撅紝鍒嗗寘锛岄摼涓嶆甯告柇寮�鐨勫姙銆�
涓夈�乻ocket閫氫俊妯″瀷鍙风殑浣胯锛屼竴浣撴満鎴朜杈撳叆杈撳嚭銆�
鍥涖�乻ocket妗嗘灦netty鐨勪娇瑕侊紝浠ヤ笌N杈撳叆杈撳嚭鐨勫疄鐜扮悊璁猴紝涓轰粈涓嶈繕鏄紓姝ヤ笉闃诲銆�
浜斻�佸悓姝ユ垨寮傛锛岄樆濉炴垨涓嶉樆濉炪��
鍏�丱SI涓冨眰妯″瀷鍙凤紝鍖呮嫭TCP,IP鐨勪竴浜涘熀鏈煡璇�
涓冦�乭ttp涓紝get post鐨勪笉涓�鏍�
鍏�佽璁瞙ttp,tcp,udp涔嬮棿鍏崇郴鎴栦笉涓�鏍枫��
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鍗併�丠TTP鍗忚銆� HTTPS鍗忚锛孲SL鍗忚涓庡畬鎴愭暣浜や簰绋嬪簭锛�
鍗佷竴銆乼cp鐨勬嫢濉烇紝蹇洖浼狅紝ip鐨勬姤鏂囦涪寮�
鍗佷簩銆乭ttps鍔炵殑涓�涓�涓�涓▼搴忥紝瀵圭О鍔犲瘑鎴栦笉瀵圭О鍔犲瘑
鍗佷笁銆乭ead鍚勪竴涓�涓壒寰佹垨涓嶄竴鏍�
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8銆佹暟瀛楀瓧鎹ぇ鍏∕ySql
涓�銆丮ySql鐨勫瓨鍌ㄥ紩鎿庣殑涓嶄竴鏍�
浜屻�佸崟涓�涓�涓储寮曘�佽仈鍚堢储寮曘�佷富閿储寮�
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