Java使用ForkJoin框架來并行執(zhí)行任務(wù)課件

1、現(xiàn)代的計(jì)算機(jī)已經(jīng)向多CPU方向發(fā)展，即使是普通的PC，甚至現(xiàn)在的智能手機(jī)、多核處理器已被廣泛應(yīng)用。在未來，處理器的核心數(shù)將會發(fā)展的越來越多。雖然硬件上的多核CPU已經(jīng)十分成熟，但是很多應(yīng)用程序并未這種多核CPU做好準(zhǔn)備，因此并不能很好地利用多核CPU的性能優(yōu)勢。為了充分利用多CPU、多核CPU的性能優(yōu)勢，級軟基軟件系統(tǒng)應(yīng)該可以充分“挖掘”每個(gè)CPU的計(jì)算能力，決不能讓某個(gè)CPU處于“空閑”狀態(tài)。為此，可以考慮把一個(gè)任務(wù)拆分成多個(gè)“小任務(wù)”,把多個(gè)小任務(wù)放到多個(gè)處理器核心上并行執(zhí)行。當(dāng)多個(gè)“小任務(wù)”執(zhí)行完成之后，再將這些執(zhí)行結(jié)果合并起來即可。如下面的示意圖所示：第一步分割任務(wù)。首先我們需要有一個(gè)

2、fork類來把大任務(wù)分割成子任務(wù)，有可能子任務(wù)還是很大，所以還需要不停的分割，直到分割出的子任務(wù)足夠小。第二步執(zhí)行任務(wù)并合并結(jié)果。分割的子任務(wù)分別放在雙端隊(duì)列里，然后幾個(gè)啟動(dòng)線程分別從雙端隊(duì)列里獲取任務(wù)執(zhí)行。子任務(wù)執(zhí)行完的結(jié)果都統(tǒng)一放在一個(gè)隊(duì)列里，啟動(dòng)一個(gè)線程從隊(duì)列里拿數(shù)據(jù)，然后合并這些數(shù)據(jù)。Java提供了ForkJoinPool來支持將一個(gè)任務(wù)拆分成多個(gè)“小任務(wù)”并行計(jì)算，再把多個(gè)“小任務(wù)”的結(jié)果合成總的計(jì)算結(jié)果。ForkJoinPool是ExecutorService的實(shí)現(xiàn)類，因此是一種特殊的線程池。ForkJoinPool提供了如下兩個(gè)常用的構(gòu)造器。 public ForkJoinPoo

3、l(int parallelism)：創(chuàng)建一個(gè)包含parallelism個(gè)并行線程的ForkJoinPool public ForkJoinPool() ：以Runtime.getRuntime().availableProcessors()的返回值作為parallelism來創(chuàng)建ForkJoinPool創(chuàng)建ForkJoinPool實(shí)例后，可以釣魚ForkJoinPool的submit(ForkJoinTask task)或者invoke(ForkJoinTask task)來執(zhí)行指定任務(wù)。其中ForkJoinTask代表一個(gè)可以并行、合并的任務(wù)。ForkJoinTask是一個(gè)抽象類，它有兩個(gè)

4、抽象子類：RecursiveAction和RecursiveTask。 RecursiveTask代表有返回值的任務(wù) RecursiveAction代表沒有返回值的任務(wù)。一、RecursiveAction下面以一個(gè)沒有返回值的大任務(wù)為例，介紹一下RecursiveAction的用法。大任務(wù)是：打印0-200的數(shù)值。小任務(wù)是：每次只能打印50個(gè)數(shù)值。java view plaincopyprint?1. importjava.util.concurrent.ForkJoinPool;2. importjava.util.concurrent.RecursiveAction;3. importja

5、va.util.concurrent.TimeUnit;4. 5. /RecursiveAction為ForkJoinTask的抽象子類，沒有返回值的任務(wù) 6. classPrintTaskextendsRecursiveAction7. /每個(gè)小任務(wù)最多只打印50個(gè)數(shù) 8. privatestaticfinalintMAX=50;9. 10. privateintstart;11. privateintend;12. 13. PrintTask(intstart,intend)14. this.start=start;15. this.end=end;16. 17. 18. Override

6、19. protectedvoidcompute()20. /當(dāng)end-start的值小于MAX時(shí)候，開始打印 21. if(end-start)MAX)22. for(inti=start;iend;i+)23. System.out.println(Thread.currentThread().getName()+的i值:24. +i);25. 26. else27. /將大任務(wù)分解成兩個(gè)小任務(wù) 28. intmiddle=(start+end)/2;29. PrintTaskleft=newPrintTask(start,middle);30. PrintTaskright=newPri

7、ntTask(middle,end);31. /并行執(zhí)行兩個(gè)小任務(wù) 32. left.fork();33. right.fork();34. 35. 36. 37. 38. publicclassForkJoinPoolTest39. /*40. *paramargs41. *throwsException42. */43. publicstaticvoidmain(Stringargs)throwsException44. /創(chuàng)建包含Runtime.getRuntime().availableProcessors()返回值作為個(gè)數(shù)的并行線程的ForkJoinPool 45. ForkJoin

8、PoolforkJoinPool=newForkJoinPool();46. /提交可分解的PrintTask任務(wù) 47. forkJoinPool.submit(newPrintTask(0,200);48. forkJoinPool.awaitTermination(2,TimeUnit.SECONDS);/阻塞當(dāng)前線程直到ForkJoinPool中所有的任務(wù)都執(zhí)行結(jié)束 49. /關(guān)閉線程池 50. forkJoinPool.shutdown();51. 52. 53. import java.util.concurrent.ForkJoinPool;import java.util.co

9、ncurrent.RecursiveAction;import java.util.concurrent.TimeUnit;/RecursiveAction為ForkJoinTask的抽象子類，沒有返回值的任務(wù)class PrintTask extends RecursiveAction / 每個(gè)小任務(wù)最多只打印50個(gè)數(shù)private static final int MAX = 50;private int start;private int end;PrintTask(int start, int end) this.start = start;this.end = end;Overrid

10、eprotected void compute() / 當(dāng)end-start的值小于MAX時(shí)候，開始打印if (end - start) MAX) for (int i = start; i end; i+) System.out.println(Thread.currentThread().getName() + 的i值:+ i); else / 將大任務(wù)分解成兩個(gè)小任務(wù)int middle = (start + end) / 2;PrintTask left = new PrintTask(start, middle);PrintTask right = new PrintTask(mid

11、dle, end);/ 并行執(zhí)行兩個(gè)小任務(wù)left.fork();right.fork();public class ForkJoinPoolTest /* * param args * throws Exception */public static void main(String args) throws Exception / 創(chuàng)建包含Runtime.getRuntime().availableProcessors()返回值作為個(gè)數(shù)的并行線程的ForkJoinPoolForkJoinPool forkJoinPool = new ForkJoinPool();/ 提交可分解的Print

12、Task任務(wù)forkJoinPool.submit(new PrintTask(0, 200);forkJoinPool.awaitTermination(2, TimeUnit.SECONDS);/阻塞當(dāng)前線程直到 ForkJoinPool 中所有的任務(wù)都執(zhí)行結(jié)束/ 關(guān)閉線程池forkJoinPool.shutdown();運(yùn)行結(jié)果如下：java view plaincopyprint?1. ForkJoinPool-1-worker-2的i值:752. ForkJoinPool-1-worker-2的i值:763. ForkJoinPool-1-worker-2的i值:774. ForkJ

13、oinPool-1-worker-2的i值:785. ForkJoinPool-1-worker-2的i值:796. ForkJoinPool-1-worker-2的i值:807. ForkJoinPool-1-worker-2的i值:818. ForkJoinPool-1-worker-2的i值:829. ForkJoinPool-1-worker-2的i值:8310. ForkJoinPool-1-worker-2的i值:8411. ForkJoinPool-1-worker-2的i值:8512. ForkJoinPool-1-worker-2的i值:8613. ForkJoinPool-

14、1-worker-2的i值:8714. ForkJoinPool-1-worker-2的i值:8815. ForkJoinPool-1-worker-2的i值:8916. ForkJoinPool-1-worker-2的i值:9017. ForkJoinPool-1-worker-2的i值:9118. ForkJoinPool-1-worker-2的i值:9219. ForkJoinPool-1-worker-2的i值:9320. ForkJoinPool-1-worker-2的i值:9421. ForkJoinPool-1-worker-2的i值:9522. ForkJoinPool-1-w

15、orker-2的i值:9623. ForkJoinPool-1-worker-2的i值:9724. ForkJoinPool-1-worker-2的i值:9825. ForkJoinPool-1-worker-2的i值:9926. ForkJoinPool-1-worker-2的i值:5027. ForkJoinPool-1-worker-2的i值:5128. ForkJoinPool-1-worker-2的i值:5229. ForkJoinPool-1-worker-2的i值:5330. ForkJoinPool-1-worker-2的i值:5431. ForkJoinPool-1-work

16、er-2的i值:5532. ForkJoinPool-1-worker-2的i值:5633. ForkJoinPool-1-worker-2的i值:5734. ForkJoinPool-1-worker-2的i值:5835. ForkJoinPool-1-worker-2的i值:5936. ForkJoinPool-1-worker-2的i值:6037. ForkJoinPool-1-worker-2的i值:6138. ForkJoinPool-1-worker-2的i值:6239. ForkJoinPool-1-worker-2的i值:6340. ForkJoinPool-1-worker-

17、2的i值:6441. ForkJoinPool-1-worker-2的i值:6542. ForkJoinPool-1-worker-2的i值:6643. ForkJoinPool-1-worker-2的i值:6744. ForkJoinPool-1-worker-2的i值:6845. ForkJoinPool-1-worker-2的i值:6946. ForkJoinPool-1-worker-1的i值:17547. ForkJoinPool-1-worker-1的i值:17648. ForkJoinPool-1-worker-1的i值:17749. ForkJoinPool-1-worker-

18、1的i值:17850. ForkJoinPool-1-worker-1的i值:17951. ForkJoinPool-1-worker-1的i值:18052. ForkJoinPool-1-worker-1的i值:18153. ForkJoinPool-1-worker-1的i值:18254. ForkJoinPool-1-worker-1的i值:18355. ForkJoinPool-1-worker-1的i值:18456. ForkJoinPool-1-worker-1的i值:18557. ForkJoinPool-1-worker-1的i值:18658. ForkJoinPool-1-w

19、orker-1的i值:18759. ForkJoinPool-1-worker-1的i值:18860. ForkJoinPool-1-worker-1的i值:18961. ForkJoinPool-1-worker-1的i值:19062. ForkJoinPool-1-worker-1的i值:19163. ForkJoinPool-1-worker-1的i值:19264. ForkJoinPool-1-worker-1的i值:19365. ForkJoinPool-1-worker-1的i值:19466. ForkJoinPool-1-worker-1的i值:19567. ForkJoinPo

20、ol-1-worker-1的i值:19668. ForkJoinPool-1-worker-1的i值:19769. ForkJoinPool-1-worker-1的i值:19870. ForkJoinPool-1-worker-1的i值:19971. ForkJoinPool-1-worker-1的i值:15072. ForkJoinPool-1-worker-1的i值:15173. ForkJoinPool-1-worker-1的i值:15274. ForkJoinPool-1-worker-1的i值:15375. ForkJoinPool-1-worker-1的i值:15476. Fork

21、JoinPool-1-worker-1的i值:15577. ForkJoinPool-1-worker-1的i值:15678. ForkJoinPool-1-worker-1的i值:15779. ForkJoinPool-1-worker-1的i值:15880. ForkJoinPool-1-worker-1的i值:15981. ForkJoinPool-1-worker-1的i值:16082. ForkJoinPool-1-worker-1的i值:16183. ForkJoinPool-1-worker-1的i值:16284. ForkJoinPool-1-worker-1的i值:16385

22、. ForkJoinPool-1-worker-1的i值:16486. ForkJoinPool-1-worker-1的i值:16587. ForkJoinPool-1-worker-1的i值:16688. ForkJoinPool-1-worker-1的i值:16789. ForkJoinPool-1-worker-1的i值:16890. ForkJoinPool-1-worker-1的i值:16991. ForkJoinPool-1-worker-1的i值:17092. ForkJoinPool-1-worker-1的i值:17193. ForkJoinPool-1-worker-1的i值

23、:17294. ForkJoinPool-1-worker-1的i值:17395. ForkJoinPool-1-worker-1的i值:17496. ForkJoinPool-1-worker-1的i值:12597. ForkJoinPool-1-worker-1的i值:12698. ForkJoinPool-1-worker-1的i值:12799. ForkJoinPool-1-worker-1的i值:128100. ForkJoinPool-1-worker-1的i值:129101. ForkJoinPool-1-worker-1的i值:130102. ForkJoinPool-1-wo

24、rker-1的i值:131103. ForkJoinPool-1-worker-1的i值:132104. ForkJoinPool-1-worker-1的i值:133105. ForkJoinPool-1-worker-1的i值:134106. ForkJoinPool-1-worker-1的i值:135107. ForkJoinPool-1-worker-1的i值:136108. ForkJoinPool-1-worker-1的i值:137109. ForkJoinPool-1-worker-1的i值:138110. ForkJoinPool-1-worker-1的i值:139111. Fo

25、rkJoinPool-1-worker-1的i值:140112. ForkJoinPool-1-worker-1的i值:141113. ForkJoinPool-1-worker-1的i值:142114. ForkJoinPool-1-worker-1的i值:143115. ForkJoinPool-1-worker-1的i值:144116. ForkJoinPool-1-worker-1的i值:145117. ForkJoinPool-1-worker-1的i值:146118. ForkJoinPool-1-worker-1的i值:147119. ForkJoinPool-1-worker-

26、1的i值:148120. ForkJoinPool-1-worker-1的i值:149121. ForkJoinPool-1-worker-1的i值:100122. ForkJoinPool-1-worker-1的i值:101123. ForkJoinPool-1-worker-1的i值:102124. ForkJoinPool-1-worker-1的i值:103125. ForkJoinPool-1-worker-1的i值:104126. ForkJoinPool-1-worker-1的i值:105127. ForkJoinPool-1-worker-1的i值:106128. ForkJoi

27、nPool-1-worker-1的i值:107129. ForkJoinPool-1-worker-1的i值:108130. ForkJoinPool-1-worker-1的i值:109131. ForkJoinPool-1-worker-1的i值:110132. ForkJoinPool-1-worker-1的i值:111133. ForkJoinPool-1-worker-1的i值:112134. ForkJoinPool-1-worker-1的i值:113135. ForkJoinPool-1-worker-1的i值:114136. ForkJoinPool-1-worker-1的i值:

28、115137. ForkJoinPool-1-worker-1的i值:116138. ForkJoinPool-1-worker-1的i值:117139. ForkJoinPool-1-worker-1的i值:118140. ForkJoinPool-1-worker-1的i值:119141. ForkJoinPool-1-worker-1的i值:120142. ForkJoinPool-1-worker-1的i值:121143. ForkJoinPool-1-worker-1的i值:122144. ForkJoinPool-1-worker-1的i值:123145. ForkJoinPool

29、-1-worker-1的i值:124146. ForkJoinPool-1-worker-1的i值:25147. ForkJoinPool-1-worker-1的i值:26148. ForkJoinPool-1-worker-1的i值:27149. ForkJoinPool-1-worker-1的i值:28150. ForkJoinPool-1-worker-1的i值:29151. ForkJoinPool-1-worker-1的i值:30152. ForkJoinPool-1-worker-1的i值:31153. ForkJoinPool-1-worker-1的i值:32154. ForkJ

30、oinPool-1-worker-1的i值:33155. ForkJoinPool-1-worker-1的i值:34156. ForkJoinPool-1-worker-1的i值:35157. ForkJoinPool-1-worker-1的i值:36158. ForkJoinPool-1-worker-1的i值:37159. ForkJoinPool-1-worker-1的i值:38160. ForkJoinPool-1-worker-1的i值:39161. ForkJoinPool-1-worker-1的i值:40162. ForkJoinPool-1-worker-1的i值:41163.

31、 ForkJoinPool-1-worker-1的i值:42164. ForkJoinPool-1-worker-1的i值:43165. ForkJoinPool-1-worker-1的i值:44166. ForkJoinPool-1-worker-1的i值:45167. ForkJoinPool-1-worker-1的i值:46168. ForkJoinPool-1-worker-1的i值:47169. ForkJoinPool-1-worker-1的i值:48170. ForkJoinPool-1-worker-1的i值:49171. ForkJoinPool-1-worker-1的i值:

32、0172. ForkJoinPool-1-worker-1的i值:1173. ForkJoinPool-1-worker-1的i值:2174. ForkJoinPool-1-worker-1的i值:3175. ForkJoinPool-1-worker-1的i值:4176. ForkJoinPool-1-worker-1的i值:5177. ForkJoinPool-1-worker-1的i值:6178. ForkJoinPool-1-worker-1的i值:7179. ForkJoinPool-1-worker-1的i值:8180. ForkJoinPool-1-worker-1的i值:918

33、1. ForkJoinPool-1-worker-1的i值:10182. ForkJoinPool-1-worker-1的i值:11183. ForkJoinPool-1-worker-1的i值:12184. ForkJoinPool-1-worker-1的i值:13185. ForkJoinPool-1-worker-1的i值:14186. ForkJoinPool-1-worker-1的i值:15187. ForkJoinPool-1-worker-1的i值:16188. ForkJoinPool-1-worker-1的i值:17189. ForkJoinPool-1-worker-1的i

34、值:18190. ForkJoinPool-1-worker-1的i值:19191. ForkJoinPool-1-worker-1的i值:20192. ForkJoinPool-1-worker-1的i值:21193. ForkJoinPool-1-worker-1的i值:22194. ForkJoinPool-1-worker-1的i值:23195. ForkJoinPool-1-worker-1的i值:24196. ForkJoinPool-1-worker-2的i值:70197. ForkJoinPool-1-worker-2的i值:71198. ForkJoinPool-1-work

35、er-2的i值:72199. ForkJoinPool-1-worker-2的i值:73200. ForkJoinPool-1-worker-2的i值:74ForkJoinPool-1-worker-2的i值:75ForkJoinPool-1-worker-2的i值:76ForkJoinPool-1-worker-2的i值:77ForkJoinPool-1-worker-2的i值:78ForkJoinPool-1-worker-2的i值:79ForkJoinPool-1-worker-2的i值:80ForkJoinPool-1-worker-2的i值:81ForkJoinPool-1-work

36、er-2的i值:82ForkJoinPool-1-worker-2的i值:83ForkJoinPool-1-worker-2的i值:84ForkJoinPool-1-worker-2的i值:85ForkJoinPool-1-worker-2的i值:86ForkJoinPool-1-worker-2的i值:87ForkJoinPool-1-worker-2的i值:88ForkJoinPool-1-worker-2的i值:89ForkJoinPool-1-worker-2的i值:90ForkJoinPool-1-worker-2的i值:91ForkJoinPool-1-worker-2的i值:92

37、ForkJoinPool-1-worker-2的i值:93ForkJoinPool-1-worker-2的i值:94ForkJoinPool-1-worker-2的i值:95ForkJoinPool-1-worker-2的i值:96ForkJoinPool-1-worker-2的i值:97ForkJoinPool-1-worker-2的i值:98ForkJoinPool-1-worker-2的i值:99ForkJoinPool-1-worker-2的i值:50ForkJoinPool-1-worker-2的i值:51ForkJoinPool-1-worker-2的i值:52ForkJoinPo

38、ol-1-worker-2的i值:53ForkJoinPool-1-worker-2的i值:54ForkJoinPool-1-worker-2的i值:55ForkJoinPool-1-worker-2的i值:56ForkJoinPool-1-worker-2的i值:57ForkJoinPool-1-worker-2的i值:58ForkJoinPool-1-worker-2的i值:59ForkJoinPool-1-worker-2的i值:60ForkJoinPool-1-worker-2的i值:61ForkJoinPool-1-worker-2的i值:62ForkJoinPool-1-worke

39、r-2的i值:63ForkJoinPool-1-worker-2的i值:64ForkJoinPool-1-worker-2的i值:65ForkJoinPool-1-worker-2的i值:66ForkJoinPool-1-worker-2的i值:67ForkJoinPool-1-worker-2的i值:68ForkJoinPool-1-worker-2的i值:69ForkJoinPool-1-worker-1的i值:175ForkJoinPool-1-worker-1的i值:176ForkJoinPool-1-worker-1的i值:177ForkJoinPool-1-worker-1的i值:

40、178ForkJoinPool-1-worker-1的i值:179ForkJoinPool-1-worker-1的i值:180ForkJoinPool-1-worker-1的i值:181ForkJoinPool-1-worker-1的i值:182ForkJoinPool-1-worker-1的i值:183ForkJoinPool-1-worker-1的i值:184ForkJoinPool-1-worker-1的i值:185ForkJoinPool-1-worker-1的i值:186ForkJoinPool-1-worker-1的i值:187ForkJoinPool-1-worker-1的i值:

41、188ForkJoinPool-1-worker-1的i值:189ForkJoinPool-1-worker-1的i值:190ForkJoinPool-1-worker-1的i值:191ForkJoinPool-1-worker-1的i值:192ForkJoinPool-1-worker-1的i值:193ForkJoinPool-1-worker-1的i值:194ForkJoinPool-1-worker-1的i值:195ForkJoinPool-1-worker-1的i值:196ForkJoinPool-1-worker-1的i值:197ForkJoinPool-1-worker-1的i值:

42、198ForkJoinPool-1-worker-1的i值:199ForkJoinPool-1-worker-1的i值:150ForkJoinPool-1-worker-1的i值:151ForkJoinPool-1-worker-1的i值:152ForkJoinPool-1-worker-1的i值:153ForkJoinPool-1-worker-1的i值:154ForkJoinPool-1-worker-1的i值:155ForkJoinPool-1-worker-1的i值:156ForkJoinPool-1-worker-1的i值:157ForkJoinPool-1-worker-1的i值:

43、158ForkJoinPool-1-worker-1的i值:159ForkJoinPool-1-worker-1的i值:160ForkJoinPool-1-worker-1的i值:161ForkJoinPool-1-worker-1的i值:162ForkJoinPool-1-worker-1的i值:163ForkJoinPool-1-worker-1的i值:164ForkJoinPool-1-worker-1的i值:165ForkJoinPool-1-worker-1的i值:166ForkJoinPool-1-worker-1的i值:167ForkJoinPool-1-worker-1的i值:

44、168ForkJoinPool-1-worker-1的i值:169ForkJoinPool-1-worker-1的i值:170ForkJoinPool-1-worker-1的i值:171ForkJoinPool-1-worker-1的i值:172ForkJoinPool-1-worker-1的i值:173ForkJoinPool-1-worker-1的i值:174ForkJoinPool-1-worker-1的i值:125ForkJoinPool-1-worker-1的i值:126ForkJoinPool-1-worker-1的i值:127ForkJoinPool-1-worker-1的i值:

45、128ForkJoinPool-1-worker-1的i值:129ForkJoinPool-1-worker-1的i值:130ForkJoinPool-1-worker-1的i值:131ForkJoinPool-1-worker-1的i值:132ForkJoinPool-1-worker-1的i值:133ForkJoinPool-1-worker-1的i值:134ForkJoinPool-1-worker-1的i值:135ForkJoinPool-1-worker-1的i值:136ForkJoinPool-1-worker-1的i值:137ForkJoinPool-1-worker-1的i值:

46、138ForkJoinPool-1-worker-1的i值:139ForkJoinPool-1-worker-1的i值:140ForkJoinPool-1-worker-1的i值:141ForkJoinPool-1-worker-1的i值:142ForkJoinPool-1-worker-1的i值:143ForkJoinPool-1-worker-1的i值:144ForkJoinPool-1-worker-1的i值:145ForkJoinPool-1-worker-1的i值:146ForkJoinPool-1-worker-1的i值:147ForkJoinPool-1-worker-1的i值:

47、148ForkJoinPool-1-worker-1的i值:149ForkJoinPool-1-worker-1的i值:100ForkJoinPool-1-worker-1的i值:101ForkJoinPool-1-worker-1的i值:102ForkJoinPool-1-worker-1的i值:103ForkJoinPool-1-worker-1的i值:104ForkJoinPool-1-worker-1的i值:105ForkJoinPool-1-worker-1的i值:106ForkJoinPool-1-worker-1的i值:107ForkJoinPool-1-worker-1的i值:

48、108ForkJoinPool-1-worker-1的i值:109ForkJoinPool-1-worker-1的i值:110ForkJoinPool-1-worker-1的i值:111ForkJoinPool-1-worker-1的i值:112ForkJoinPool-1-worker-1的i值:113ForkJoinPool-1-worker-1的i值:114ForkJoinPool-1-worker-1的i值:115ForkJoinPool-1-worker-1的i值:116ForkJoinPool-1-worker-1的i值:117ForkJoinPool-1-worker-1的i值:

49、118ForkJoinPool-1-worker-1的i值:119ForkJoinPool-1-worker-1的i值:120ForkJoinPool-1-worker-1的i值:121ForkJoinPool-1-worker-1的i值:122ForkJoinPool-1-worker-1的i值:123ForkJoinPool-1-worker-1的i值:124ForkJoinPool-1-worker-1的i值:25ForkJoinPool-1-worker-1的i值:26ForkJoinPool-1-worker-1的i值:27ForkJoinPool-1-worker-1的i值:28F

50、orkJoinPool-1-worker-1的i值:29ForkJoinPool-1-worker-1的i值:30ForkJoinPool-1-worker-1的i值:31ForkJoinPool-1-worker-1的i值:32ForkJoinPool-1-worker-1的i值:33ForkJoinPool-1-worker-1的i值:34ForkJoinPool-1-worker-1的i值:35ForkJoinPool-1-worker-1的i值:36ForkJoinPool-1-worker-1的i值:37ForkJoinPool-1-worker-1的i值:38ForkJoinPoo

51、l-1-worker-1的i值:39ForkJoinPool-1-worker-1的i值:40ForkJoinPool-1-worker-1的i值:41ForkJoinPool-1-worker-1的i值:42ForkJoinPool-1-worker-1的i值:43ForkJoinPool-1-worker-1的i值:44ForkJoinPool-1-worker-1的i值:45ForkJoinPool-1-worker-1的i值:46ForkJoinPool-1-worker-1的i值:47ForkJoinPool-1-worker-1的i值:48ForkJoinPool-1-worker-1的i值:49ForkJoinPool-1-worker-1的i值:0ForkJoinPool-1-worker-1的i值:1ForkJoinPool-1-worker-1的i值:2ForkJoinPool-1-worker-1的i值:3ForkJoinPool-1-worker-1的i值:4ForkJoinPool-1-worker-1的i值:5ForkJoinPool-1-worker-1的i值:6ForkJoinPool-1-worker-1的i值:7ForkJoinPool-1-worker-1的i值