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鐩墠锛屽绾跨▼缂栫▼鍙互璇存槸鍦ㄥぇ閮ㄥ垎骞冲彴鍜屽簲鐢ㄤ笂閮介渶瑕佸疄鐜扮殑涓€涓熀鏈渶姹傘€傛湰绯诲垪鏂囩珷灏辨潵瀵?nbsp;Java 骞冲彴涓嬬殑澶氱嚎绋嬬紪绋嬬煡璇?/strong>杩涜璁茶В锛屼粠姒傚康鍏ラ棬銆?span class="mq-4">搴曞眰瀹炵幇鍒?span class="mq-5">涓婂眰搴旂敤閮戒細娑夊強鍒帮紝棰勮涓€鍏变細鏈変簲绡囨枃绔狅紝甯屾湜瀵逛綘鏈夋墍甯姪 馃槑馃槑

鏈瘒鏂囩珷鏄涓€绡囷紝鍏堟潵浠嬬粛涓?Java 澶氱嚎绋嬬殑鍩虹姒傚康浠ュ強闇€瑕侀潰瀵圭殑鎸戞垬锛屾槸鍚庣画鏂囩珷鐨勬暡闂ㄧ爾

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鍋囪瀛樺湪涓変釜浜嬩欢锛堜簨浠禔銆佷簨浠禕銆佷簨浠禖锛夐渶瑕佹垜浠畬鎴愶紝姣忎釜浜嬩欢鍧囧寘鍚竴瀹氱殑鍓嶇疆澶勭悊鏃堕棿鍜岀瓑寰呭畬鎴愭椂闂达紝鍗虫瘡涓簨浠跺潎闇€瑕佸厛澶勭悊涓€瀹氭椂闂达紝澶勭悊瀹屾垚鍚庡啀绛夊緟涓€娈垫椂闂达紝绛夊緟杩囧悗璇ヤ簨浠跺氨绠椾綔宸插畬鎴愪簡銆傞偅涔堬紝鎴戜滑灏卞彲浠ラ噰鐢ㄤ笁绉嶄笉鍚岀殑鏂瑰紡鏉ュ畬鎴愯繖涓変釜浜嬩欢锛?/p>

鈥?/span>涓茶銆傛寜鐓ч『搴忎緷娆℃潵澶勭悊涓変釜浜嬩欢锛屽緟鏌愪釜浜嬩欢澶勭悊涓旂瓑寰呯粨鏉熷悗鍐嶅鐞嗕笅涓€涓簨浠躲€傝繖绉嶆柟寮忛渶瑕佹秷鑰椾竴涓汉鍔?/span>鈥?/span>骞跺彂銆傚厛澶勭悊浜嬩欢 A锛屽綋浜嬩欢 A 鐨勫墠缃鐞嗗畬鎴愬悗锛岃浆鑰屾潵澶勭悊浜嬩欢 B锛屽綋浜嬩欢 B 鐨勫墠缃鐞嗗畬鎴愬悗锛岃浆鑰屾潵澶勭悊浜嬩欢 C锛屾渶鍚庡氨鍙绛夊緟涓変釜浜嬩欢缁撴潫鍗冲彲銆傝繖绉嶆柟寮忛渶瑕佹秷鑰椾竴涓汉鍔?/span>鈥?/span>骞惰銆備笁涓簨浠跺垎鍒浆浜ょ敱涓変釜浜鸿繘琛屽悓鏃跺鐞嗐€傝繖绉嶆柟寮忛渶瑕佹秷鑰椾笁涓汉鍔?/span>

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浠庝互涓婂亣璁剧殑鎯呮櫙鏄犲皠鍒拌蒋浠朵笘鐣?/p>

鈥?/span>骞跺彂灏辨槸鍦ㄤ竴娈垫椂闂村唴浠ヤ氦鏇跨殑鏂瑰紡鏉ュ畬鎴愬涓换鍔★紝浣跨敤澶氫釜绾跨▼鏉ュ垎鍒鐞嗕笉鍚岀殑浠诲姟锛屽嵆浣垮湪鍗曚釜澶勭悊鍣ㄧ殑鎯呭喌涓嬩篃鍙互閫氳繃鏃堕棿鐗囧垏鎹?/strong>鐨勬妧鏈潵瀹炵幇鍦ㄤ竴涓椂闂存鍐呰繍琛屽涓嚎绋嬶紝鍥犳鍗充娇鍙湁涓€涓鐞嗗櫒涔熷彲浠ュ疄鐜板苟鍙?/span>鈥?/span>骞惰灏辨槸浠ュ悓鏃跺鐞嗙殑鏂瑰紡鏉ュ畬鎴愬涓换鍔★紝浣跨敤澶氫釜绾跨▼鏉ュ垎鍒鐞嗕笉鍚岀殑浠诲姟锛岀劧鍚庡皢澶氫釜绾跨▼鍒嗗埆杞氦缁欎笉鍚岀殑澶勭悊鍣ㄨ繘琛岃繍琛岋紝鍥犳骞惰闇€瑕佹湁澶氫釜澶勭悊鍣ㄦ墠鍙互瀹炵幇鈥?/span>鑰屽湪鐜板疄鎯呭喌涓嬶紝绋嬪簭闇€瑕佸悓鏃舵墽琛岀殑绾跨▼鏁伴噺寰€寰€鏄繙澶氫簬澶勭悊鍣ㄧ殑鏁伴噺锛屽苟鍙戞墠鏄垜浠殑涓昏瀹炵幇鐩爣銆傚洜姝わ紝鎴戜滑鍙互杩欎箞鐞嗚В锛?span class="mq-26">瀹炵幇澶氱嚎绋嬬紪绋嬬殑杩囩▼灏辨槸灏嗕换鍔＄殑鎵ц鏂瑰紡鐢变覆琛屾敼涓哄苟鍙戠殑杩囩▼锛屽嵆瀹炵幇骞跺彂鍖栵紝浠ユ鏉ュ敖閲忔彁楂樼▼搴忓拰纭欢鐨勮繍琛屾晥鐜?/strong>

閭ｄ娇鐢ㄥ绾跨▼鏈変粈涔堝ソ澶勫憿锛?/p>

鈥?/span>瀵逛簬璁＄畻鏈烘潵璇达紝鍏跺鐞嗗櫒鐨勮繍绠楅€熷害鐩告瘮瀛樺偍鍜岄€氫俊瀛愮郴缁熻蹇簡鍑犱釜鏁伴噺绾э紝濡傛灉鍙噰鐢ㄥ崟绾跨▼锛岄偅涔堝綋绾跨▼鍦ㄥ鐞嗙鐩?I/O銆佹暟鎹簱璁块棶绛変换鍔℃椂锛屽鐞嗗櫒灏辫闂茬疆鐫€娌℃湁娲诲共浜嗭紝杩欏氨閫犳垚浜嗗緢澶х殑鎬ц兘娴垂銆傛鏃跺氨鍙互閫氳繃閲囩敤澶氱嚎绋嬫潵浣垮鐞嗗櫒灏介噺澶勪簬杩愯浆鐘舵€侊紝灏介噺鍒╃敤鍒板叾杩愮畻鑳藉姏鈥?/span>姝ゅ锛屽浜庝竴涓湇鍔＄锛岃　閲忓叾鎬ц兘楂樹綆濂藉潖鐨勪竴涓噸瑕佹爣鍑嗕箣涓€鏄?span class="mq-33">姣忕浜嬪姟澶勭悊鏁帮紙TPS锛夌殑澶у皬锛屽畠浠ｈ〃鐫€涓€绉掑唴鏈嶅姟绔钩鍧囪兘鍝嶅簲鐨勮姹傛€绘暟銆傛湇鍔＄鍙兘浼氬湪鏋佸皬鐨勬椂闂存鍐呮敹鍒板涓姹傦紝鏈嶅姟绔殑 TPS 灏卞拰绋嬪簭鐨勫苟鍙戣兘鍔涳紙鍗冲悓鏃跺鐞嗗椤逛换鍔＄殑鑳藉姏锛夋湁鐫€瀵嗗垏鍏宠仈鈥?/span>鍐嶆瘮濡傦紝鍦?Android 搴旂敤寮€鍙戜腑锛岀郴缁熻瀹氫簡鍙湁 main 绾跨▼鎵嶅彲浠ヨ繘琛?UI 缁樺埗鍜屽埛鏂帮紝濡傛灉涓嶅皢鑰楁椂鎿嶄綔锛圛O璇诲啓銆佺綉缁滆姹傜瓑锛夋斁鍒板瓙绾跨▼杩涜澶勭悊锛岄偅涔堢敤鎴峰搴旂敤鐨?UI 鎿嶄綔琛屼负锛堢偣鍑诲睆骞曘€佹粦鍔ㄥ垪琛ㄧ瓑锛夊緢澶у彲鑳藉氨浼氱敱浜庢棤娉曞強鏃惰 main 绾跨▼澶勭悊锛屽鑷村簲鐢ㄤ技涔庤鍗′綇浜嗭紝鏈€缁堢敤鎴峰彲鑳藉氨浼氭斁寮冧娇鐢ㄨ搴旂敤浜?/span>

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澶氱嚎绋嬬紪绋嬫槸涓€绉嶄互绾跨▼涓哄熀鏈娊璞″崟浣嶇殑缂栫▼鑼冨紡锛圥raadigm锛夈€傜幇浠ｈ绠楁満鎿嶄綔绯荤粺鍑犱箮閮芥敮鎸佸浠诲姟澶勭悊锛屽浠诲姟澶勭悊鏈変袱绉嶄笉鍚岀殑绫诲瀷锛?span class="mq-53">鍩轰簬杩涚▼鐨勫浠诲姟澶勭悊鍜?span class="mq-54">鍩轰簬绾跨▼鐨勫浠诲姟澶勭悊

鍩轰簬杩涚▼鐨勫浠诲姟澶勭悊鏄敱鎿嶄綔绯荤粺鏉ュ疄鐜板苟绠＄悊鐨勶紝涓€鑸殑绋嬪簭寮€鍙戞帴瑙︿笉鍒拌繖涓眰闈€傝€屽熀浜庣嚎绋嬬殑澶氫换鍔″鐞嗗垯鍙互鐢辩▼搴忓紑鍙戣€呰嚜宸辨潵瀹炵幇骞惰繘琛岀鐞嗐€傚彲浠ヨ锛屽绾跨▼缂栫▼鐨勪竴涓洰鐨勫氨鏄负浜嗗疄鐜?span class="mq-56">鍩轰簬绾跨▼鐨勫浠诲姟澶勭悊

Java 瀵瑰绾跨▼鎻愪緵浜嗗唴缃敮鎸併€侸ava 鏍囧噯绫诲簱涓殑 java.lang.Thread 绫诲氨鏄绾跨▼杩欎釜姒傚康鐨勬娊璞″疄鐜帮紝鎻愪緵浜嗗湪涓嶅悓鐨勭‖浠跺拰鎿嶄綔绯荤粺骞冲彴涓婂绾跨▼鎿嶄綔鐨勭粺涓€澶勭悊锛屽睆钄戒簡涓嶅悓鐨勭‖浠跺拰鎿嶄綔绯荤粺鐨勫樊寮傛€?/p>

Java 鏈韩鏄竴涓绾跨▼鐨勫钩鍙帮紝鍗充娇寮€鍙戣€呮病鏈変富鍔ㄥ垱寤虹嚎绋嬶紝姝ゆ椂杩涚▼鍐呰繕鏄娇鐢ㄥ埌浜嗗涓嚎绋嬶紙渚嬪锛岃繕瀛樺湪 GC 绾跨▼锛夈€傛墍璋撶殑鍗曠嚎绋嬬紪绋嬪線寰€鎸囩殑鏄湪绋嬪簭涓紑鍙戣€呮病鏈変富鍔ㄥ垱寤虹嚎绋?/p>

涓夈€乀hread

Java 鏍囧噯绫诲簱 java.lang.Thread 鏄?Java 骞冲彴瀵圭嚎绋嬭繖涓蹇电殑鎶借薄瀹炵幇锛孴hread 绫绘垨鑰呭叾瀛愮被鐨勪竴涓疄渚嬪氨鏄竴涓嚎绋?/p>

1銆佺嚎绋嬬殑灞炴€?/h4>
灞炴€?/td> 鍚箟
缂栧彿锛圛D锛?/td> long銆傜敤浜庢爣璇嗕笉鍚岀殑绾跨▼锛屼笉鍚岀殑绾跨▼鎷ユ湁涓嶅悓鐨勭紪鍙凤紝鍦?Java 铏氭嫙鏈虹殑鍗曟鐢熷懡鍛ㄦ湡鍐呭叿鏈夊敮涓€鎬?/td>
鍚嶇О锛圢ame锛?/td> String銆傜敤浜庡尯鍒嗕笉鍚岀殑绾跨▼锛屾柟渚垮紑鍙戝拰璋冭瘯鏃跺畾浣嶉棶棰橈紝鍦?Java 铏氭嫙鏈虹殑鍗曟鐢熷懡鍛ㄦ湡鍐呭彲浠ラ噸澶?/td>
绫诲埆锛圖aemon锛?/td> boolean銆傚€间负 true 琛ㄧず璇ョ嚎绋嬩负瀹堟姢绾跨▼锛屽惁鍒欎负鐢ㄦ埛绾跨▼
浼樺厛绾э紙Priority锛?/td> int銆侸ava 瀹氫箟浜?1~10 鐨?10 涓紭鍏堢骇锛岄粯璁ゅ€间负 5

鎸夌収绾跨▼鏄惁浼氶樆姝?Java 铏氭嫙鏈烘甯稿仠姝紝Java 涓殑绾跨▼鍒嗕负鐢ㄦ埛绾跨▼鍜?span class="mq-84">瀹堟姢绾跨▼銆傜敤鎴风嚎绋嬩細闃绘 Java 铏氭嫙鏈虹殑姝ｅ父鍋滄锛屽嵆涓€涓?Java 铏氭嫙鏈哄彧鏈夊湪鍏舵墍鏈夌敤鎴风嚎绋嬮兘杩愯缁撴潫鐨勬儏鍐典笅鎵嶈兘姝ｅ父鍋滄銆傝€屽畧鎶ょ嚎绋嬩笉浼氬奖鍝?Java 铏氭嫙鏈虹殑姝ｅ父鍋滄锛屽嵆浣垮簲鐢ㄧ▼搴忎腑杩樻湁瀹堟姢绾跨▼鍦ㄨ繍琛屼篃涓嶅奖鍝?Java 铏氭嫙鏈虹殑姝ｅ父鍋滄銆傚洜姝わ紝瀹堟姢绾跨▼閫傚悎鐢ㄤ簬鎵ц涓€浜涢噸瑕佹€т笉鏄緢楂樼殑浠诲姟銆備絾濡傛灉 Java 铏氭嫙鏈烘槸琚己鍒跺仠姝㈡垨鑰呯敱浜庡紓甯歌鍋滄鐨勮瘽锛岀敤鎴风嚎绋嬩篃鏃犳硶闃绘 Java 铏氭嫙鏈虹殑鍋滄

Java 绾跨▼鐨勪紭鍏堢骇灞炴€ф湰璐ㄤ笂鍙槸涓€涓粰绾跨▼璋冨害鍣ㄧ殑鎻愮ず淇℃伅锛屼互渚夸簬绾跨▼璋冨害鍣ㄥ喅瀹氫紭鍏堣皟搴﹀摢浜涚嚎绋嬭繍琛岋紝浼樺厛绾ч珮鐨勭嚎绋嬬悊璁轰笂浼氳幏寰楁洿澶氱殑澶勭悊鍣ㄤ娇鐢ㄦ椂闂达紝浣嗙嚎绋嬭皟搴﹀櫒骞朵笉淇濊瘉涓€瀹氭寜鐓х嚎绋嬩紭鍏堢骇鐨勯珮浣庢潵璋冨害绾跨▼銆傛澶栵紝 JVM 鎵€鍦ㄧ殑鎿嶄綔绯荤粺鍙兘浼氬拷鐣ョ敋鑷充富鍔ㄦ潵淇敼鎴戜滑瀵圭嚎绋嬬殑浼樺厛绾ч厤缃紝涓斿鏋滅嚎绋嬬殑浼樺厛绾ц缃笉褰擄紝鐢氳嚦鏈夊彲鑳藉鑷寸嚎绋嬫案杩滄棤娉曞緱鍒拌繍琛岋紝鍗充骇鐢熺嚎绋嬮ゥ楗?/p>

濡傛灉鍦ㄧ嚎绋?A 涓垱寤轰簡绾跨▼ B锛岄偅涔堢嚎绋?B 灏辩О涓虹嚎绋?A 鐨勫瓙绾跨▼锛岀嚎绋?A 灏辩О涓虹嚎绋?B 鐨勭埗绾跨▼銆傜敱浜?Java 铏氭嫙鏈哄垱寤虹殑 main 绾跨▼锛堜富绾跨▼锛夎礋璐ｆ墽琛?Java 绋嬪簭鐨勫叆鍙ｆ柟娉?nbsp;main() 鏂规硶锛屽洜姝?main 鏂规硶涓垱寤虹殑绾跨▼閮芥槸 main 绾跨▼鐨勫瓙绾跨▼鎴栭棿鎺ュ瓙绾跨▼銆傛澶栵紝涓€涓嚎绋嬫槸鍚︽槸瀹堟姢绾跨▼榛樿涓庡叾鐖剁嚎绋嬬浉鍚岋紝绾跨▼浼樺厛绾х殑榛樿鍊间篃涓庡叾鐖剁嚎绋嬬殑浼樺厛绾х浉鍚屻€傞渶瑕佹敞鎰忕殑鏄紝铏界劧绾跨▼闂村叿鏈夎繖绫荤埗瀛愬叧绯伙紝浣嗘槸瀹冧滑骞朵笉浼氱浉浜掑奖鍝嶅鏂圭殑鐢熷懡鍛ㄦ湡锛屼竴鏂圭嚎绋嬬敓鍛藉懆鏈熺殑缁撴潫锛堜笉绠℃槸姝ｅ父缁撴潫杩樻槸寮傚父鍋滄锛夊苟涓嶅奖鍝嶅彟涓€涓嚎绋嬬户缁繍琛?/p>

2銆佺嚎绋嬬殑鏂规硶

鏂规硶 璇存槑
static Thread currentThread() 杩斿洖褰撳墠鐨勬墽琛岀嚎绋嬪璞?/td>
static void yield() 浣垮綋鍓嶇嚎绋嬩富鍔ㄦ斁寮冨叾澶勭悊鍣ㄧ殑鍗犵敤锛屼絾涓嶄竴瀹氫細浣垮綋鍓嶇嚎绋嬫殏鍋?/td>
static void sleep(long) 浣垮綋鍓嶇嚎绋嬩紤鐪犳寚瀹氭椂闂?/td>
void start() 鍚姩绾跨▼
void join() 鑻ョ嚎绋?A 璋冪敤绾跨▼ B 鐨?join() 鏂规硶锛屽垯绾跨▼ A 浼氭殏鍋滆繍琛岋紝鐩村埌绾跨▼ B 杩愯缁撴潫
void suspend() 鏆傚仠绾跨▼锛岃繘鍏ョ潯鐪犵姸鎬侊紙宸插簾寮冿級
void resume() 鍞ら啋绾跨▼锛屽拰 suspend() 鎴愬浣跨敤锛堝凡搴熷純锛?/td>
void stop() 鍋滄绾跨▼锛堝凡搴熷純锛?/td>

Thread.suspend() 鍜?nbsp;Thread.resume() 鏄?Thread 绫绘彁渚涚殑鐢ㄤ簬鏆傚仠鍜屽敜閱掔嚎绋嬬殑鏂规硶锛岀敤浜庡湪鏌愪簺杩愯鏉′欢涓嶆弧瓒崇殑鏃跺€欐殏鍋滄墽琛屼换鍔★紝鍚庣画鍦ㄨ繍琛屾潯浠舵弧瓒崇殑鏃跺€欏敜閱掔嚎绋嬬户缁墽琛屼换鍔★紝浣嗙幇鍦ㄥ潎宸插簾寮?/p>

3銆佺嚎绋嬬殑鐘舵€?/h4>

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鍊?/td> 鐘舵€?/td>
NEW 绾跨▼澶勪簬鏂板缓鐘舵€侊紝杩樻病鏈夎皟鐢?start() 鏂规硶
RUNNABLE 绾跨▼瑕佷箞褰撳墠姝ｅ湪鎵ц锛岃涔堝湪鑾峰緱澶勭悊鍣ㄦ椂闂寸墖涔嬪悗灏卞彲浠ユ墽琛?/td>
BLOCKED 绾跨▼鍥犱负鍙戣捣浜嗛樆濉炲紡鎿嶄綔锛屾垨鑰呮鍦ㄧ瓑寰呴渶瑕佺殑璧勬簮鏃惰鎸傝捣
WAITING 绾跨▼鍥犱负绛夊緟鏌愪簺鍔ㄤ綔鑰屾寕璧锋墽琛屻€備緥濡傦紝鍥犱负璋冪敤浜?wait() 鎴?join() 鏂规硶鎵€浠ュ浜庤繖绉嶇姸鎬侊紝杩欑鐘舵€佷笅鐨勭嚎绋嬮渶瑕佺敱澶栭儴鍏跺畠绾跨▼鏉ュ敜閱掕嚜韬?/td>
TIMED_WAITING 绾跨▼鎸傝捣涓€娈垫寚瀹氱殑鏃堕棿锛屽綋杈惧埌鎸囧畾鐨勬椂闂村埌杈惧悗锛岀嚎绋嬪氨浼氳浆涓?RUNNABLE 鐘舵€併€備緥濡傚綋璋冪敤 sleep(long) 銆亀ait(long) 銆?join(long) 绛夋柟娉曟椂灏变細澶勪簬杩欑鐘舵€?/td>
TERMINATED 宸茬粡杩愯缁撴潫鐨勭嚎绋嬪氨澶勪簬姝ょ姸鎬?/td>

鍙互鐢ㄦ洿鍔犻€氫織鐨勮瑷€鏉ユ弿杩扮嚎绋嬬殑鐢熷懡鍛ㄦ湡锛?/p>

1.鏂板缓鐘舵€?NEW浣跨敤 new 鍏抽敭瀛楀缓绔嬩竴涓嚎绋嬪璞″悗锛岀嚎绋嬪氨澶勪簬鏂板缓鐘舵€侊紝涓€涓凡鍒涘缓浣嗚繕鏈惎鍔ㄧ殑绾跨▼灏卞浜庢鐘舵€併€傜嚎绋嬩細淇濇寔杩欎釜鐘舵€佺洿鍒拌璋冪敤 Thread.start() 鏂规硶2.灏辩华鐘舵€?RUNNABLE褰撶嚎绋嬪璞¤皟鐢ㄤ簡 start() 鏂规硶涔嬪悗锛岀嚎绋嬪氨浼氳繘鍏ュ氨缁姸鎬併€傝鐘舵€佸彲浠ョ湅鎴愪竴涓鍚堢姸鎬侊紝瀹冨寘鍚袱涓瓙鐘舵€侊細READY 鍜?nbsp;RUNNING銆傚墠鑰呰〃绀虹嚎绋嬪浜庡氨缁槦鍒椾腑锛屽綋琚嚎绋嬭皟搴﹀櫒閫変腑璋冨害鍚庡氨鍙互姝ｅ紡杩愯锛屽彉涓?RUNNING 鐘舵€併€傚悗鑰呰〃绀虹嚎绋嬫澶勪簬杩愯涓紝鍏?nbsp;run() 鏂规硶瀵瑰簲鐨勬寚浠ゆ鍦ㄧ敱澶勭悊鍣ㄦ墽琛屻€傚綋鎵ц绾跨▼鐨?nbsp;yiedId() 鏂规硶鏃讹紝鍏剁姸鎬佸彲鑳戒細鐢?RUNNING 鍒囨崲涓?READY3.闃诲鐘舵€?BLOCKED褰撶嚎绋嬪彂璧蜂竴涓樆濉炲紡鐨?IO 鎿嶄綔鎴栬€呮槸鍦ㄧ敵璇蜂竴涓敱鍏跺畠绾跨▼鎸佹湁鐨勭嫭鍗犺祫婧愭椂锛岃绾跨▼灏变細澶勪簬姝ょ姸鎬併€傚鐞?BLOCKED 鐘舵€佺殑绾跨▼涓嶄細鍗犵敤 CPU 璧勬簮銆傚綋鍏剁洰鏍囪涓烘垨鑰呮槸鐩爣璧勬簮琚弧瓒冲悗锛屽氨鍙互鍒囨崲涓?RUNNABLE 鐘舵€?/span>4.鏃犻檺鏈熺瓑寰呯姸鎬?WAITING褰撶嚎绋嬬殑杩愯闇€瑕佹弧瓒虫煇浜涙墽琛屾潯浠惰€屽綋鍓嶅苟涓嶆弧瓒虫椂锛岄€氬父灏变細閫氳繃璁╄绾跨▼涓诲姩璋冪敤 Object.wait()銆?code class="mq-166">Thread.join() 绛夌被浼兼柟娉曞皢绾跨▼鍒囨崲涓?WAITING 鐘舵€併€傚綋鍓嶇姸鎬佹槸 WAITING 鐨勭嚎绋嬪浜庢殏鍋滆繍琛岀殑鐘舵€侊紝闇€瑕佸閮ㄥ叾瀹冪嚎绋嬮€氳繃 Object.notify() 绛夋柟娉曟潵涓诲姩鍞ら啋璇ョ嚎绋?/span>5.闄愭湡绛夊緟鐘舵€?TIMED_WAITINGTIMED_WAITING 鐘舵€佸拰 WAITING 鐘舵€佺被浼笺€傚尯鍒湪浜?TIMED_WAITING 鐘舵€佸苟闈炴槸绾跨▼鏈韩瀹屽叏鏃犻檺鍒跺湴杩涜绛夊緟锛屽叾绛夊緟琛屼负甯︽湁鎸囧畾鏃堕棿鑼冨洿鐨勯檺鍒讹紝褰撳湪鎸囧畾鏃堕棿鍐呮病鏈夊畬鎴愯绾跨▼鎵€鏈熸湜鐨勭壒瀹氭搷浣滄椂锛岃绾跨▼灏变細杞负 RUNNABLE 鐘舵€併€傚彲浠ラ€氳繃 Object.wait(long) 鏂规硶鏉ヤ娇绾跨▼鍒囨崲涓?TIMED_WAITING 鐘舵€?/span>6.缁堟鐘舵€?TERMINATED褰撲竴涓嚎绋嬪畬鎴愯嚜韬换鍔℃垨鑰呯敱浜庡叾瀹冨師鍥犺杩粓姝㈡椂锛岀嚎绋嬪氨浼氬垏鎹㈠埌缁堟鐘舵€侊紝鑷虫绾跨▼鐨勬暣涓敓鍛藉懆鏈熷氨缁撴潫浜?/span>

鐢变簬涓€涓嚎绋嬪湪鍏舵暣涓敓鍛藉懆鏈熷唴鍙兘琚惎鍔ㄤ竴娆★紝鎵€浠ョ嚎绋嬩篃鍙細澶勪簬涓€娆?nbsp;NEW 鐘舵€佸拰涓€娆?nbsp;TERMINATED 鐘舵€併€傚浜庝竴涓绾跨▼绯荤粺鏉ヨ锛屾渶鐞嗘兂鐨勬儏鍐靛氨鏄墍鏈夊凡鍚姩涓旀湭缁撴潫鐨勭嚎绋嬭兘涓€鐩村浜?RUNNING 鐘舵€侊紝浣嗚繖鏄笉鍙兘瀹炵幇鐨勩€傚湪鐜板疄鍦烘櫙涓嬬嚎绋嬩細鍦ㄥ涓姸鎬侀棿鏉ュ洖鍒囨崲锛屼笖绾跨▼浠?RUNNABLE 鐘舵€佽浆鎹负 BLOCKED銆乄AITING 鍜?TIMED_WAITING 杩欏嚑涓姸鎬佷腑鐨勪换浣曚竴涓椂閮芥剰鍛崇潃鍙戠敓浜嗙嚎绋嬩笂涓嬫枃鍒囨崲



4銆乀hreadGroup

绾跨▼缁勶紙ThreadGroup锛夌敤鏉ヨ〃绀轰竴缁勭浉鍏宠仈鐨勭嚎绋嬶紝瀹冩槸 Thread 绫诲寘鍚殑涓€涓唴閮ㄥ睘鎬э紝鍙互閫氳繃 Thread.getThreadGroup()鏉ヨ幏鍙栬鍊笺€傜嚎绋嬩笌绾跨▼缁勪箣闂寸殑鍏崇郴绫讳技浜庢枃浠剁郴缁熶腑鏂囦欢涓庢枃浠跺す涔嬮棿鐨勫叧绯伙紝涓€涓嚎绋嬬粍鍙互鍖呭惈澶氫釜绾跨▼浠ュ強鍏跺畠绾跨▼缁?/p>

濡傛灉鍦ㄥ垱寤虹嚎绋嬫椂娌℃湁鏄剧ず鎸囧畾绾跨▼鎵€灞炵殑绾跨▼缁勭殑璇濓紝鍦ㄩ粯璁ゆ儏鍐典笅绾跨▼灏辫褰掔被浜庡叾鐖剁嚎绋嬫墍灞炵殑绾跨▼缁勪笅銆備粠 Thread 绫荤殑浠ヤ笅鏂规硶灏卞彲浠ョ湅鍑烘潵锛?/p> 

 private void init(ThreadGroup g, Runnable target, String name, long stackSize, AccessControlContext acc, boolean inheritThreadLocals) { 路路路路
 Thread parent = currentThread(); SecurityManager security = System.getSecurityManager(); if (g == null) { /* Determine if it's an applet or not */
 /* If there is a security manager, ask the security manager what to do. */ if (security != null) { //榛樿涔熸槸杩斿洖 Thread.currentThread().getThreadGroup() g = security.getThreadGroup(); }
 /* If the security doesn't have a strong opinion of the matter use the parent thread group. */ if (g == null) { g = parent.getThreadGroup(); } } 路路路路
 }

Java 铏氭嫙鏈哄湪鍒涘缓 main 绾跨▼锛堟墍鏈夌嚎绋嬬殑鐖剁嚎绋嬶級鐨勬椂鍊欎細涓哄叾鑷姩鎸囧畾涓€涓嚎绋嬬粍锛屽洜姝や换浣曚竴涓嚎绋嬮兘鏈変竴涓嚎绋嬬粍涓庝箣鐩稿叧鑱斻€備笖涓€涓嚎绋嬬粍鐨勭埗绾跨▼缁勯粯璁ゆ槸鍦ㄥ０鏄庤绾跨▼缁勬椂鎵€鍦ㄧ嚎绋嬬殑绾跨▼缁勶紝浣嗗苟闈炴墍鏈夌嚎绋嬬粍鍧囨湁鐖剁嚎绋嬬粍锛屾渶椤跺眰绾跨▼缁勫氨涓嶅寘鍚埗绾跨▼缁?/p> 

/** * 浣滆€咃細leavesC * 鏃堕棿锛?/span>2020/8/12 22:10 * 鎻忚堪锛?/span> * GitHub锛?/span>https://github.com/leavesC */fun main() { val mainThreadGroup = Thread.currentThread().threadGroup println(mainThreadGroup) println("mainThreadGroup.parent: " + mainThreadGroup.parent) println("mainThreadGroup.parent.parent: " + mainThreadGroup.parent.parent) val thread = Thread() println(thread.threadGroup) val thread2 = Thread(ThreadGroup("otherThreadGroup"), "thread") println(thread2.threadGroup)// java.lang.ThreadGroup[name=main,maxpri=10]// mainThreadGroup.parent: java.lang.ThreadGroup[name=system,maxpri=10]// mainThreadGroup.parent.parent: null// java.lang.ThreadGroup[name=main,maxpri=10]// java.lang.ThreadGroup[name=otherThreadGroup,maxpri=10]}

ThreadGroup 鏈韩瀛樺湪璁捐缂洪櫡闂锛岀洰鍓嶇殑浣跨敤鍦烘櫙鏈夐檺锛屾棩甯稿紑鍙戜腑鍙互鏃犻渶鐞嗕細

5銆佺嚎绋嬪紓甯告崟鑾?/h4>

鍦ㄥ緢澶氭椂鍊欙紝鎴戜滑浼氶€氳繃鍒涘缓涓€涓嚎绋嬫睜鏉ユ墽琛屼换鍔★紝鑰屽綋鏌愪釜浠诲姟鐢变簬鎶涘嚭寮傚父瀵艰嚧鍏舵墽琛岀嚎绋嬪紓甯哥粓姝㈡椂锛屾垜浠氨闇€瑕佸杩欑寮傚父鎯呭喌杩涜涓婃姤浠ヤ究鍚庣画鍒嗘瀽銆傝瀹炵幇杩欎釜鏁堟灉锛屽氨闇€瑕佽兘澶熸敹鍒扮嚎绋嬭寮傚父缁堟鏃剁殑浜嬩欢閫氱煡锛岃繖灏遍渶瑕佺敤鍒?nbsp;Thread.setUncaughtExceptionHandler(UncaughtExceptionHandler) 鏂规硶

閫氳繃璇ユ柟娉曟垜浠彲浠ュ湪寮傚父鍙戠敓鏃朵笖绾跨▼琚仠姝㈠墠鑾峰彇鍒扮浉搴旂殑 Thread 瀵硅薄鍜?Throwable 瀹炰緥

/** * 浣滆€咃細leavesC * 鏃堕棿锛?/span>2020/8/12 22:14 * 鎻忚堪锛?/span> * GitHub锛?/span>https://github.com/leavesC */fun main() { val runnable = Runnable { for (i in 4 downTo 0) { println(100 % i) Thread.sleep(100) } } val thread = Thread(runnable, "otherName") thread.setUncaughtExceptionHandler { t, e -> println("threadName: " + t.name) println("exc: $e") } thread.start()}
0142400100threadName: otherNameexc: java.lang.ArithmeticException: / by zero

ThreadGroup 鏈韩涔熷疄鐜颁簡 UncaughtExceptionHandler 鎺ュ彛锛屾墍浠ュ鏋?Thread 瀵硅薄涓嶅寘鍚叧鑱旂殑 UncaughtExceptionHandler 瀹炰緥鐨勮瘽锛屽垯浼氬皢寮傚父浜ょ敱 ThreadGroup 鏉ヨ繘琛屽鐞?/p>

浠?Thread 绫荤殑浠ヤ笅閫昏緫灏卞彲浠ョ湅鍑烘潵

public class Thread implements Runnable {
 private ThreadGroup group;
 private volatile UncaughtExceptionHandler uncaughtExceptionHandler;
 private void dispatchUncaughtException(Throwable e) { getUncaughtExceptionHandler().uncaughtException(this, e); }
 public UncaughtExceptionHandler getUncaughtExceptionHandler() { return uncaughtExceptionHandler != null ? uncaughtExceptionHandler : group; }
}

ThreadGroup 榛樿鎯呭喌涓嬩細灏嗗紓甯镐氦鐢卞叾鐖剁嚎绋嬬粍杩涜澶勭悊锛岃€屽浜庝笉鍖呭惈鐖剁嚎绋嬬粍鐨勭嚎绋嬬粍瀵硅薄锛堥《灞傜嚎绋嬬粍锛夛紝鍒欎細灏嗗紓甯镐氦鐢?Thread 绫荤殑 defaultUncaughtExceptionHandler 杩涜澶勭悊銆傛墍浠ワ紝鎴戜滑鍙互閫氳繃 Thread 鐨勯潤鎬佹柟娉?nbsp;setDefaultUncaughtExceptionHandler 鏂规硶鏉ヤ负绋嬪簭璁剧疆涓€涓叏灞€鐨勯粯璁ゅ紓甯稿鐞嗗櫒

public class ThreadGroup implements Thread.UncaughtExceptionHandler {
 public void uncaughtException(Thread t, Throwable e) { if (parent != null) { //褰撴湁鐖剁嚎绋嬬粍鏃讹紝鍒欏皢寮傚父浜ょ敱鐖剁嚎绋嬬粍鏉ュ鐞?/span> parent.uncaughtException(t, e); } else { //褰撶埗绾跨▼缁勪笉瀛樺湪鏃讹紝鍒欏皾璇曞皢寮傚父浜ょ敱 DefaultUncaughtExceptionHandler 鏉ュ鐞?/span> Thread.UncaughtExceptionHandler ueh = Thread.getDefaultUncaughtExceptionHandler(); if (ueh != null) { ueh.uncaughtException(t, e); } else if (!(e instanceof ThreadDeath)) { System.err.print("Exception in thread \"" + t.getName() + "\" "); e.printStackTrace(System.err); } } }
}
public class Thread implements Runnable {
 private static volatile UncaughtExceptionHandler defaultUncaughtExceptionHandler;
 public static UncaughtExceptionHandler getDefaultUncaughtExceptionHandler(){ return defaultUncaughtExceptionHandler; }
 //璁剧疆鍏ㄥ眬榛樿鐨勫紓甯稿鐞嗗櫒 public static void setDefaultUncaughtExceptionHandler(UncaughtExceptionHandler eh) { SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkPermission( new RuntimePermission("setDefaultUncaughtExceptionHandler") ); }
 defaultUncaughtExceptionHandler = eh; }
}

鎵€浠ワ紝褰撶嚎绋嬬敱浜庡紓甯歌€岀粓姝㈡椂锛孶ncaughtExceptionHandler 瀹炰緥鐨勯€夋嫨浼樺厛绾т粠楂樺埌浣庡垎鍒槸锛?/p>

1.Thread.uncaughtExceptionHandler2.ThreadGroup.uncaughtExceptionHandler3.Thread.defaultUncaughtExceptionHandler

6銆乀hreadFactory

鍦ㄩ」鐩腑鍏堝悗闇€瑕佷娇鐢ㄥ埌澶氫釜绾跨▼鏄竴涓櫘閬嶇殑闇€姹傦紝鑰屽鏋滄瘡娆″潎绠€鍗曠殑閫氳繃 new Thread() 鏉ュ垱寤虹嚎绋嬬殑璇濓紝鍦ㄥ嚭鐜伴棶棰樻椂灏卞緢闅惧畾浣嶉棶棰樻墍鍦ㄣ€傛墍浠?Java 鏍囧噯搴撲篃鎻愪緵浜嗗垱寤虹嚎绋嬬殑宸ュ巶鏂规硶锛屽嵆 ThreadFactory 鎺ュ彛

public interface ThreadFactory {
 Thread newThread(Runnable r);
}

ThreadFactory 鎻愪緵浜嗗皢瑕佹墽琛岀殑浠诲姟 Runnable 涓庤鍒涘缓鐨?Thread 鐩稿叧鑱旂殑鏂规硶锛屽嵆鎴戜滑鍙互閫氳繃 ThreadFactory 鏉ユ爣鏄?Thread 瑕佹墽琛岀殑鍏蜂綋浠诲姟銆佷负 Thread 璁剧疆涓€涓湁鍏蜂綋鍚箟鐨勫悕瀛椼€佽缃?Thread 鐨勮繍琛屼紭鍏堢骇绛?/p>

渚嬪锛孍xecutors 鍐呴儴灏卞寘鍚簡涓€涓?nbsp;DefaultThreadFactory锛岄€氳繃 threadNumber 鑷鐨勬柟寮忎负姣忎竴涓垱寤虹殑绾跨▼璁剧疆浜嗙壒瀹氱殑绾跨▼鍚嶃€佺‘淇濈嚎绋嬫槸鐢ㄦ埛绾跨▼銆佺‘淇濈嚎绋嬬殑浼樺厛绾т负姝ｅ父绾у埆

static class DefaultThreadFactory implements ThreadFactory { private static final AtomicInteger poolNumber = new AtomicInteger(1); private final ThreadGroup group; private final AtomicInteger threadNumber = new AtomicInteger(1); private final String namePrefix;
 DefaultThreadFactory() { SecurityManager s = System.getSecurityManager(); group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup(); namePrefix = "pool-" + poolNumber.getAndIncrement() + "-thread-"; }
 public Thread newThread(Runnable r) { Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0); if (t.isDaemon()) t.setDaemon(false); if (t.getPriority() != Thread.NORM_PRIORITY) t.setPriority(Thread.NORM_PRIORITY); return t; } }

鑰屽浜庢垜浠」鐩嚜宸卞畾涔夌殑绾跨▼姹狅紝浣跨敤 ThreadFactory 鐨勪竴涓瘮杈冩湁鎰忎箟鐨勭敤澶勬槸锛氫负绾跨▼璁剧疆鍏宠仈鐨?UncaughtExceptionHandler锛岃繖鍦ㄦ彁楂樼郴缁熺殑鍋ュ．鎬ф柟闈㈡槸寰堟湁濂藉鐨?/p>

7銆佺嚎绋嬬殑鎵ц鏃舵満

鎴戜滑鍙互绠€鍗曞湴鐞嗚В涓鸿繍琛屼竴涓嚎绋嬪氨鏄姹?Java 铏氭嫙鏈烘潵璋冪敤 Runnable 瀵硅薄鐨?nbsp;run() 鏂规硶锛屼粠鑰屼娇寰楃嚎绋嬬殑浠诲姟澶勭悊閫昏緫寰椾互琚墽琛屻€備絾鎴戜滑閫氳繃 Thread.start() 鍚姩涓€涓嚎绋嬪苟涓嶆剰鍛崇潃绾跨▼灏辫兘澶熼┈涓婅鎵ц锛岀嚎绋嬬殑鍏蜂綋鎵ц鏃舵満鐢?span class="mq-1238">绾跨▼璋冨害鍣?/strong>鏉ュ喅瀹氾紝鎵ц鏃舵満鍏锋湁涓嶇‘瀹氭€э紝鐢氳嚦鍙兘浼氱敱浜庣嚎绋嬫椿鎬ф晠闅滆€屾案杩滄棤娉曡繍琛屻€傛澶栵紝鐢变簬 run() 鏂规硶鏄?nbsp;public 鐨勶紝鎵€浠ュ畠涔熷彲浠ョ敱澶栭儴涓诲姩鏉ヨ皟鐢ㄦ墽琛岋紝浣嗘鏃跺叾浠诲姟灏辨槸鐢卞綋鍓嶇殑杩愯绾跨▼鏉ユ墽琛岋紝杩欏湪澶у鏁版椂鍊欓兘鏄病鏈夊疄闄呮剰涔夌殑

鑰屼笉绠℃槸閫氳繃浠€涔堟柟寮忔潵鍒涘缓绾跨▼锛屽綋绾跨▼鐨?nbsp;run() 鏂规硶鎵ц缁撴潫鏃讹紙涓嶇鏄甯哥粨鏉熻繕鏄敱浜庡紓甯歌€屼腑鏂繍琛岋級锛岀嚎绋嬬殑鐢熷懡鍛ㄦ湡涔熷氨璧板埌鏈熬浜嗭紝鍏跺崰鐢ㄧ殑璧勬簮浼氬湪鍚庣画琚?Java 铏氭嫙鏈哄瀮鍦惧洖鏀躲€傝€屼笖锛岀嚎绋嬫槸涓€娆℃€ц祫婧愶紝鎴戜滑鏃犳硶閫氳繃鍐嶆璋冪敤 start() 鏂规硶鏉ラ噸鏂板惎鍔ㄧ嚎绋嬶紝褰撳娆¤皟鐢ㄨ鏂规硶鏃朵細鎶涘嚭 IllegalThreadStateException

鍥涖€佸绾跨▼瀹夊叏

瀹炵幇澶氱嚎绋嬬紪绋嬩笉鏄畝鍗曞湴澹版槑澶氫釜 Thread 瀵硅薄骞跺惎鍔ㄥ氨鍙互鐨勪簡锛屽湪鐜板疄鍦烘櫙涓紝澶氫釜绾跨▼闂村線寰€鏄渶瑕佸畬鎴愭暟鎹氦鎹㈠拰琛屼负浜や簰绛夊悇绉嶅鏉傛搷浣滅殑锛岃€屼笉鏄畝鍗曞湴鈥滃悇琛屽叾鏄€濄€傜浉姣斿崟绾跨▼锛?span class="mq-1247">浣跨敤澶氱嚎绋嬩細甯︽潵璁稿鍦ㄥ崟绾跨▼涓嬩笉瀛樺湪鎴栬€呮牴鏈笉鐢ㄨ€冭檻鐨勯棶棰?/strong>

1銆佺珵鎬?/h4>

鍏堟潵鐪嬩竴涓畝鍗曠殑渚嬪瓙銆傚亣璁惧瓨鍦ㄤ竴涓晢搴?Shop锛屽叾鍒濆鍟嗗簵鏁伴噺涓洪浂銆傚瓨鍦ㄥ洓鍗佷釜鐢熶骇鑰?Producer 涓哄叾鐢熶骇鍟嗗搧锛屾瘡涓?Producer 浼氬悇鑷负鍟嗗簵鎻愪緵涓€涓晢鍝併€傞偅涔堬紝鐞嗚涓婂綋鎵€鏈?Producer 鐢熶骇瀹屾瘯鍚庯紝Shop 鐨勫晢鍝佹暟閲?goodsCount 搴旇鏄洓鍗?/p>

鍙槸锛岃繍琛屼互涓嬩唬鐮佸悗浣犱細鍙戠幇瀹為檯鏁伴噺澶ф鐜囨槸浼氬皯浜庡洓鍗?/p> 

/** * 浣滆€咃細leavesC * 鏃堕棿锛?/span>2020/8/3 22:18 * 鎻忚堪锛?/span> * GitHub锛?/span>https://github.com/leavesC */class Shop(var goodsCount: Int) {
 fun produce() { goodsCount++ }
}
class Producer(private val shop: Shop) : Thread() {
 override fun run() { sleep(100) if (shop.goodsCount < 40) { shop.produce() } println("over") }
}
fun main() { val shop = Shop(0) val threads = mutableListOf<Thread>() for (i in 1..40) { threads.add(Producer(shop)) } threads.forEach { it.start() } //淇濊瘉鎵€鏈?Producer Thread 閮芥墽琛屽畬姣曚細鍐嶆墽琛屼箣鍚庣殑璇彞 threads.forEach { it.join() } println("shop.goodsCount: " + shop.goodsCount)}

浠ヤ笂浠ｇ爜灏变娇鐢ㄥ埌浜嗗涓嚎绋嬶紝鍗曚釜 Producer 绾跨▼鐨勮涓洪€昏緫鏄嫭绔嬬殑锛岃€屽涓?Producer 绾跨▼鐨勮涓洪€昏緫瀵逛簬 Shop 鏉ヨ鏄簰鐩镐氦閿欎笖鍏堝悗椤哄簭涓嶇‘瀹氱殑锛岃繖灏辨湁鍙兘瀵艰嚧涓€绉嶆儏鍐碉細涓や釜 Producer 鍚屾椂鍒ゆ柇鍒板綋鍓嶅晢鍝佹暟閲忔槸鍗侊紝鐒跺悗鍚屾椂涓哄晢搴楃敓浜х鍗佷竴浠跺晢鍝侊紙shop.goodsCount++锛夛紝鏈€缁堝氨瀵艰嚧鏌愪釜 Producer 鐢熶骇鐨勭鍗佷竴鍙峰晢鍝佽鍙︿竴涓?Producer 瑕嗙洊浜嗭紝涓や釜 Producer 鍙敓浜т簡涓€浠跺晢鍝侊紝鍗虫暟鎹?span class="mq-1508">鏇存柊鏃犳晥/鏇存柊涓㈠け

shop.goodsCount++ 杩欐潯璇彞铏界劧鐪嬭捣鏉ュ儚鏄竴涓笉鍙垎鍓茬殑鎿嶄綔锛堝師瀛愭搷浣滐級锛屼絾瀹冨疄闄呬笂鐩稿綋浜庡涓嬩吉浠ｇ爜鎵€琛ㄧず鐨勪笁涓寚浠ょ殑缁勫悎锛?/p> 

load(shop.goodsCount , r1) //鎸囦护1锛屽皢鍙橀噺 shop.goodsCount 鐨勫€间粠鍐呭瓨璇诲埌瀵勫瓨鍣?r1increment(r1) //鎸囦护2锛屽皢瀵勫瓨鍣?r1 鐨勫€煎姞1store(shop.goodsCount , r1) //鎸囦护3锛屽皢瀵勫瓨鍣?r1 鐨勫唴瀹瑰啓鍏ュ彉閲?shop.goodsCount 鎵€瀵瑰簲鐨勫唴瀛樼┖闂?/span>

澶氫釜 Producer 绾跨▼鍙兘浼氬悓鏃跺悇鑷墽琛屼笂杩版寚浠ゃ€備緥濡傦紝鍋囪褰撳墠 goodsCount 鏄崄锛孭roducer1 鍜?Producer2 鍚屾椂鎵ц鍒版寚浠?锛屼袱涓嚎绋嬪皢 goodsCount 璇诲埌鍚勮嚜澶勭悊鍣ㄧ殑瀵勫瓨鍣ㄤ笂锛屽嵆姣忎釜绾跨▼浼氬悇鑷嫢鏈変竴浠藉壇鏈暟鎹紝鐒跺悗瀵瑰悇鑷瘎瀛樺櫒鐨勫€艰繘琛岃嚜澧炲姞涓€鐨勬搷浣滐紝褰撴墽琛屽埌鎸囦护涓夋椂锛岀敱浜?goodsCount 鎵€鍦ㄧ殑鍐呭瓨绌洪棿鏄壒瀹氱殑锛屾墍浠ヤ袱涓?Producer 绾跨▼瀵瑰唴瀛樼┖闂翠笂 goodsCount 鐨勫€肩殑鍥炰紶浼氬瓨鍦ㄧ浉浜掕鐩栫殑鎯呭喌銆傚嵆鍘熸湰鏈€缁堢粨鏋滃簲璇ユ槸閫掑鍔犱簩鐨勮涓烘渶缁堝嵈鍙湁閫掑鍔犱竴

浠ヤ笂鏄绾跨▼缂栫▼涓粡甯镐細閬囧埌鐨勪竴涓幇璞★紝鍗崇珵鎬併€傜珵鎬佹槸鎸囪绠楃殑姝ｇ‘鎬т緷璧栦簬鐩稿鏃堕棿椤哄簭鎴栬€呯嚎绋嬬殑浜ら敊銆傜珵鎬佸苟涓嶄竴瀹氬氨浼氬鑷磋绠楃粨鏋滀笉姝ｇ‘锛屽畠鍙槸涓嶆帓闄よ绠楃粨鏋滄椂鑰屾纭椂鑰岄敊璇殑鍙兘

浠庝笂杩颁唬鐮佷腑鍙互鎬荤粨鍑虹珵鎬佺殑涓ょ妯″紡锛?span class="mq-1549">read-modify-write锛堣-鏀?鍐欙級銆?span class="mq-1550">check-then-act锛堟娴嬪悗琛屽姩锛?/strong>

read-modify-write 鐨勬楠ゅ嵆锛氳鍙栦竴涓叡浜彉閲忕殑鍊硷紝鐒跺悗鏍规嵁璇ュ€艰繘琛屼竴浜涜绠椼€佹帴鐫€鏍规嵁璁＄畻缁撴灉鏇存柊鍏变韩鍙橀噺鐨勫€笺€備緥濡傦紝涓婅堪浠ｇ爜涓殑 goodsCount++ 灏辨槸杩欑妯″紡锛岀浉褰撲簬濡備笅浼唬鐮佹墍琛ㄧず鐨勪笁涓寚浠ょ殑缁勫悎

load(shop.goodsCount , r1) //鎸囦护1锛屽皢鍙橀噺 shop.goodsCount 鐨勫€间粠鍐呭瓨璇诲埌瀵勫瓨鍣?r1increment(r1) //鎸囦护2锛屽皢瀵勫瓨鍣?r1 鐨勫€煎姞1store(shop.goodsCount , r1) //鎸囦护3锛屽皢瀵勫瓨鍣?r1 鐨勫唴瀹瑰啓鍏ュ彉閲?shop.goodsCount 鎵€瀵瑰簲鐨勫唴瀛樼┖闂?/span>

绾跨▼ A 鍦ㄦ墽琛屽畬鎸囦护1锛屽紑濮嬫墽琛屾垨鑰呮鍦ㄦ墽琛屾寚浠?鏃讹紝绾跨▼ B 鍙兘宸茬粡鎵ц瀹屼簡鎸囦护3锛岃繖浣垮緱绾跨▼ A 褰撳墠鎸佹湁鐨勫叡浜彉閲?shop.goodsCount 鏄棫鍊硷紝褰撶嚎绋?A 鎵ц瀹屾寚浠?鏃讹紝杩欏氨浣垮緱绾跨▼ B 瀵瑰叡浜彉閲忕殑鏇存柊琚鐩栦簡锛屽嵆閫犳垚浜嗘洿鏂颁涪澶?/p>

check-then-act 鐨勬楠ゅ嵆锛氳鍙栦竴涓叡浜彉閲忕殑鍊硷紝鏍规嵁璇ュ彉閲忕殑鍊煎喅瀹氫笅涓€姝ョ殑鍔ㄤ綔鏄粈涔堛€備緥濡傦紝浠ヤ笅浠ｇ爜灏辨槸杩欑妯″紡

if (shop.goodsCount < 40) { //鎿嶄綔1 shop.produce() //鎿嶄綔2}

绾跨▼ A 鍦ㄦ墽琛屽畬鎿嶄綔1锛屽紑濮嬫墽琛屾搷浣?涔嬪墠锛岀嚎绋?B 鍙兘宸茬粡鏇存柊浜嗗叡浜彉閲?nbsp;shop.goodsCount 鐨勫€煎鑷?if 璇彞涓殑鏉′欢鍙樹负涓嶆垚绔嬶紝鍙鏃剁嚎绋?A 渚濈劧浼氭墽琛屾搷浣?锛岃繖鏄洜涓虹嚎绋?A 姝ゆ椂骞朵笉鐭ラ亾鍏变韩鍙橀噺宸茬粡琚洿鏂颁笖瀵艰嚧杩愯鏉′欢涓嶆垚绔嬩簡

浠庝笂杩板垎鏋愪腑鎴戜滑鍙互鎬荤粨鍑虹珵鎬佷骇鐢熺殑涓€鑸潯浠躲€傝 Q1 鍜?Q2 鏄苟鍙戣闂叡浜彉閲?V 鐨勪袱涓搷浣滐紝杩欎袱涓搷浣滃苟闈為兘鏄鎿嶄綔銆傚鏋滀竴涓嚎绋嬪湪鎵ц Q1 鏈熼棿鍙﹀涓€涓嚎绋嬪悓鏃舵墽琛?Q2锛岄偅涔堟棤璁?Q2 鏄鎿嶄綔杩樻槸鍐欐搷浣滈兘浼氬鑷寸珵鎬併€備粠杩欎釜瑙掑害鏉ョ湅锛岀珵鎬佸彲浠ョ湅鍋氭槸鐢变簬璁块棶锛堣鍙栥€佹洿鏂帮級鍚屼竴缁勫叡浜彉閲忕殑澶氫釜绾跨▼鎵€鎵ц鐨勬搷浣滆鐩镐簰浜ら敊鑰屽鑷寸殑銆傝€屼笂杩颁唬鐮佷腑閬囧埌鐨?span class="mq-1619">鏇存柊涓㈠け鍜?span class="mq-1620">璇诲埌鑴忔暟鎹?/strong>闂灏辨槸鐢变簬绔炴€佺殑瀛樺湪鑰屽鑷寸殑

闇€瑕佹敞鎰忕殑鏄紝绔炴€佺殑浜х敓鍓嶆彁鏄秹鍙婂埌浜嗗涓嚎绋嬪拰鍏变韩鍙橀噺銆傚鏋滅郴缁熶粎鍖呭惈鍗曚釜绾跨▼锛屾垨鑰呬笉娑夊強鍏变韩鍙橀噺锛岄偅涔堝氨涓嶄細浜х敓绔炴€併€傚浜庡眬閮ㄥ彉閲忥紙鍖呮嫭褰㈠紡鍙傛暟鍜屾柟娉曚綋鍐呭畾涔夌殑鍙橀噺锛夛紝鐢变簬涓嶅悓鐨勭嚎绋嬭闂殑鏄悇鑷殑閭ｄ竴浠藉眬閮ㄥ彉閲忥紝鍥犳灞€閮ㄥ彉閲忕殑浣跨敤涓嶄細瀵艰嚧绔炴€?/p>

2銆佺嚎绋嬪畨鍏ㄦ€?/h4>

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濡傛灉涓€涓被涓嶆槸绾跨▼瀹夊叏鐨勶紝鎴戜滑灏辫瀹冨湪澶氱嚎绋嬬幆澧冧笅瀛樺湪澶氱嚎绋嬪畨鍏ㄩ棶棰樸€備互涓婂畾涔変篃閫傜敤浜庡涓嚎绋嬮棿鐨勫叡浜暟鎹?/p>

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class Shop(var goodsCount: Int, var clerk: Int) {
 fun update() { goodsCount++ //璇彞1 clerk++ //璇彞2 }
}

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闈炲叕骞崇殑璧勬簮璋冨害绛栫暐鍒欏厑璁告彃闃熺幇璞°€傛柊鍒版潵鐨勭嚎绋嬩細鐩存帴灏濊瘯鐢宠璧勬簮锛屽彧鏈夊綋鐢宠澶辫触鏃舵墠浼氬皢绾跨▼鎻掑叆绛夊緟闃熷垪鐨勯槦灏俱€傚亣璁句袱绉嶅涓嚎绋嬩竴璧风珵浜夊悓涓€涓帓浠栨€ц祫婧愮殑鍦烘櫙锛?/p>

1.褰撹祫婧愯閲婃斁鏃讹紝濡傛灉鍒氬ソ鏈変竴涓椿璺冪嚎绋嬫潵鐢宠璧勬簮锛岃绾跨▼灏卞彲浠ョ洿鎺ユ姠鍗犲埌璧勬簮锛岃€屾棤闇€鍘诲敜閱掔瓑寰呴槦鍒椾腑鐨勭嚎绋嬨€傝繖绉嶅満鏅浉瀵瑰叕骞宠皟搴︾瓥鐣ュ氨灏戜簡灏嗘柊鍒版潵鐨勭嚎绋嬫殏鍋?/strong>鍜?span class="mq-2109">灏嗙瓑寰呴槦鍒楅槦澶寸殑绾跨▼鍞ら啋鐨勪袱涓搷浣滐紝鑰岃祫婧愪篃涓€鏍锋湁琚緱鍒颁娇鐢?/span>2.鍗充娇绛夊緟闃熷垪涓殑鏌愪釜绾跨▼宸茬粡琚敜閱掓潵璇曞浘鎶㈠崰璧勬簮鐨勭嫭鍗犳潈锛屽鏋滄柊鍒版潵鐨勬椿璺冪嚎绋嬪崰鐢ㄨ祫婧愮殑鏃堕棿涓嶉暱鐨勮瘽锛岄偅涔堝氨鏈夊彲鑳藉湪琚敜閱掔殑绾跨▼寮€濮嬬敵璇疯祫婧愪箣鍓嶏紝鏂板埌鏉ョ殑娲昏穬绾跨▼宸茬粡閲婃斁浜嗗璧勬簮鐨勭嫭鍗犳潈锛屼粠鑰屼笉濡ㄧ琚敜閱掔殑绾跨▼鐢宠璧勬簮銆傝繖绉嶅満鏅篃涓€鏍烽伩鍏嶄簡灏嗘柊鍒版潵鐨勭嚎绋嬫殏鍋?/strong>杩欎箞涓€涓搷浣?/span>

鍥犳锛岄潪鍏钩璋冨害绛栫暐鐨勪紭鐐逛富瑕佹湁涓ょ偣锛?/p>

1.鍚炲悙鐜囦竴鑸潵璇翠細姣斿叕骞宠皟搴︾瓥鐣ラ珮锛屽嵆鍗曚綅鏃堕棿鍐呭畠鍙互涓烘洿澶氱殑鐢宠鑰呰皟閰嶈祫婧?/span>2.闄嶄綆浜嗗彂鐢熶笂涓嬫枃鍒囨崲鐨勬鐜?/span>

闈炲叕骞宠皟搴︾瓥鐣ョ殑缂虹偣涓昏鏈変袱鐐癸細

1.鐢变簬鍏佽鎻掗槦鐜拌薄锛屾瀬绔儏鍐典笅鍙兘瀵艰嚧绛夊緟闃熷垪涓殑绾跨▼姘歌繙涔熸棤娉曡幏寰楀叾鎵€闇€鐨勮祫婧愶紝鍗冲嚭鐜?span class="mq-2123">绾跨▼楗ラタ鐨勬椿鎬ф晠闅滅幇璞?/span>2.姣忎釜璧勬簮鐢宠鑰呬粠寮€濮嬬敵璇疯祫婧愬埌鑾峰緱鐩稿簲璧勬簮鐨勭嫭鍗犳潈鎵€闇€鏃堕棿鐨勫亸宸彲鑳借緝澶э紝鍗虫湁鐨勭嚎绋嬪彲鑳藉緢蹇氨鑳界敵璇峰埌璧勬簮锛岃€屾湁鐨勭嚎绋嬪垯瑕佺粡鍘嗚嫢骞叉鏆傚仠涓庡敜閱掓墠鑳芥垚鍔熺敵璇峰埌璧勬簮

缁间笂鎵€璇夛紝鍏钩璋冨害绛栫暐閫傜敤浜庤祫婧愯鎸佹湁鐨勬椂闂磋緝闀挎垨鑰呯嚎绋嬬敵璇疯祫婧愮殑骞冲潎鏃堕棿闂撮殧杈冮暱鐨勬儏褰紝鎴栬€呰姹傜敵璇疯祫婧愭墍闇€鐨勬椂闂村亸宸緝灏忕殑鎯呭喌銆傛€荤殑鏉ヨ锛屼娇鐢ㄥ叕骞宠皟搴︾瓥鐣ョ殑寮€閿€浼氭瘮浣跨敤闈炲叕骞宠皟搴︾瓥鐣ョ殑寮€閿€瑕佸ぇ锛屽洜姝ゅ湪娌℃湁鐗瑰埆闇€姹傜殑鎯呭喌涓嬶紝搴旇榛樿浣跨敤闈炲叕骞宠皟搴︾瓥鐣?/p>

涓冦€佸弬鑰冪殑涔︾睄

銆奐ava 澶氱嚎绋嬬紪绋嬪疄鎴樻寚鍗楋紙鏍稿績绡囷級銆?/p>

銆婃繁鍏ョ悊瑙?Java 铏氭嫙鏈恒€?/p>

銆奐ava 骞跺彂缂栫▼鐨勮壓鏈€?/p>

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