accumulator, BinaryOperator combiner)<\/p>\nPredicate\u548cBiPredicate\uff1a\u5b83\u8868\u793a\u9488\u5bf9\u6d41\u5143\u7d20\u8fdb\u884c\u6d4b\u8bd5\u7684\u8c13\u8bcd\u3002\u8fd9\u7528\u4e8e\u4ecejava\u6d41\u4e2d\u7b5b\u9009\u5143\u7d20\u3002\u5c31\u50cfFunction\u4e00\u6837\uff0c\u5bf9\u4e8eint\u3001long\u548cdouble\u4e5f\u6709\u7279\u5b9a\u7684\u539f\u59cb\u63a5\u53e3\u3002\u4e00\u4e9b\u4f7f\u7528Predicate\u6216BiPredicate\u7279\u5316\u7684Stream\u65b9\u6cd5\u6709\uff1a<\/p>\n
Stream filter(Predicate predicate)
\nboolean anyMatch(Predicate predicate)
\nboolean allMatch(Predicate predicate)
\nboolean noneMatch(Predicate predicate)<\/p>\nConsumer\u548cBiConsumer\uff1a\u5b83\u8868\u793a\u63a5\u53d7\u4e00\u4e2a\u8f93\u5165\u53c2\u6570\u5e76\u8fd4\u56de\u6ca1\u6709\u7ed3\u679c\u7684\u64cd\u4f5c\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5bf9java\u6d41\u7684\u6240\u6709\u5143\u7d20\u6267\u884c\u67d0\u4e9b\u64cd\u4f5c\u3002\u4e00\u4e9bJava 8 Stream\u65b9\u6cd5\u4f7f\u7528Consumer\u3001BiConsumer\u6216\u5176\u539f\u59cb\u7279\u5316\u63a5\u53e3\u7684\u60c5\u51b5\u6709\uff1a<\/p>\n
Stream peek(Consumer action)
\nvoid forEach(Consumer action)
\nvoid forEachOrdered(Consumer action)<\/p>\nSupplier\uff1aSupplier\u8868\u793a\u901a\u8fc7\u5b83\u53ef\u4ee5\u751f\u6210\u6d41\u4e2d\u7684\u65b0\u503c\u7684\u64cd\u4f5c\u3002\u4e00\u4e9bStream\u4e2d\u91c7\u7528Supplier\u53c2\u6570\u7684\u65b9\u6cd5\u6709\uff1a<\/p>\n
public static Stream generate(Supplier s)
\n R collect(Supplier supplier,BiConsumer accumulator,BiConsumer combiner)<\/ol>\nJava\u4e2d\u7684java.util.Optional\u3002<\/h3>\n
Java Optional\u662f\u4e00\u4e2a\u5bb9\u5668\u5bf9\u8c61\uff0c\u5b83\u53ef\u4ee5\u5305\u542b\u6216\u4e0d\u5305\u542b\u975e\u7a7a\u503c\u3002\u5982\u679c\u5b58\u5728\u4e00\u4e2a\u503c\uff0cisPresent()\u65b9\u6cd5\u5c06\u8fd4\u56detrue\uff0c\u800cget()\u65b9\u6cd5\u5c06\u8fd4\u56de\u8be5\u503c\u3002\u6d41\u7684\u7ec8\u7aef\u64cd\u4f5c\u8fd4\u56deOptional\u5bf9\u8c61\u3002\u5176\u4e2d\u4e00\u4e9b\u65b9\u6cd5\u5305\u62ec\uff1a<\/p>\n
\n- Optional reduce(BinaryOperator accumulator)<\/li>\n
- Optional min(Comparator comparator)<\/li>\n
- Optional max(Comparator comparator)<\/li>\n
- Optional findFirst()<\/li>\n
- Optional findAny()<\/li>\n<\/ul>\n
java.util.Spliterator \u53ef\u4ee5\u88ab\u7ffb\u8bd1\u4e3a “Java\u4e2d\u7684Spliterator\u5de5\u5177\u7c7b”\u3002<\/h3>\n
\u4e3a\u4e86\u652f\u6301Java 8 Stream API\u4e2d\u7684\u5e76\u884c\u6267\u884c\uff0c\u4f7f\u7528\u4e86Spliterator\u63a5\u53e3\u3002Spliterator\u7684trySplit\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u7ba1\u7406\u539f\u59cbSpliterator\u5143\u7d20\u5b50\u96c6\u7684\u65b0Spliterator\u3002<\/p>\n
Java\u6d41\u7684\u4e2d\u95f4\u548c\u7ec8\u7aef\u64cd\u4f5c<\/h3>\n
Java Stream API\u64cd\u4f5c\u4e2d\u8fd4\u56de\u65b0Stream\u7684\u64cd\u4f5c\u88ab\u79f0\u4e3a\u4e2d\u95f4\u64cd\u4f5c\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u662f\u60f0\u6027\u7684\uff0c\u6240\u4ee5\u5b83\u4eec\u5f00\u59cb\u751f\u6210\u65b0\u7684\u6d41\u5143\u7d20\u5e76\u5c06\u5176\u53d1\u9001\u5230\u4e0b\u4e00\u4e2a\u64cd\u4f5c\u3002\u4e2d\u95f4\u64cd\u4f5c\u6c38\u8fdc\u4e0d\u662f\u6700\u7ec8\u7684\u7ed3\u679c\u751f\u6210\u64cd\u4f5c\u3002\u5e38\u7528\u7684\u4e2d\u95f4\u64cd\u4f5c\u5305\u62ecfilter\u548cmap\u3002Java 8 Stream API\u64cd\u4f5c\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u6216\u4ea7\u751f\u526f\u4f5c\u7528\u3002\u4e00\u65e6\u5728\u6d41\u4e0a\u8c03\u7528\u4e86\u7ec8\u7aef\u65b9\u6cd5\uff0c\u5b83\u5c31\u4f1a\u6d88\u8017\u8be5\u6d41\uff0c\u4e4b\u540e\u6211\u4eec\u65e0\u6cd5\u518d\u4f7f\u7528\u8be5\u6d41\u3002\u7ec8\u7aef\u64cd\u4f5c\u662f\u6025\u6027\u7684\uff0c\u5373\u5728\u8fd4\u56de\u7ed3\u679c\u4e4b\u524d\u5904\u7406\u6d41\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002\u5e38\u7528\u7684\u7ec8\u7aef\u65b9\u6cd5\u5305\u62ecforEach\u3001toArray\u3001min\u3001max\u3001findFirst\u3001anyMatch\u3001allMatch\u7b49\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u8bc6\u522b\u7ec8\u7aef\u65b9\u6cd5\uff0c\u5b83\u4eec\u6c38\u8fdc\u4e0d\u4f1a\u8fd4\u56de\u4e00\u4e2aStream\u3002<\/p>\n
Java Stream \u77ed\u8def\u64cd\u4f5c<\/h3>\n
\u5982\u679c\u4e00\u4e2a\u4e2d\u95f4\u64cd\u4f5c\u53ef\u80fd\u4e3a\u65e0\u9650\u6d41\u751f\u6210\u6709\u9650\u6d41\uff0c\u5219\u79f0\u5176\u4e3a\u201c\u77ed\u8def\u201d\u3002\u4f8b\u5982\uff0climit()\u548cskip()\u662f\u4e24\u4e2a\u77ed\u8def\u7684\u4e2d\u95f4\u64cd\u4f5c\u3002\u5982\u679c\u4e00\u4e2a\u7ec8\u7aef\u64cd\u4f5c\u53ef\u80fd\u5728\u6709\u9650\u65f6\u95f4\u5185\u7ec8\u6b62\u65e0\u9650\u6d41\uff0c\u5219\u79f0\u5176\u4e3a\u201c\u77ed\u8def\u201d\u3002\u4f8b\u5982\uff0canyMatch\u3001allMatch\u3001noneMatch\u3001findFirst\u548cfindAny\u90fd\u662f\u77ed\u8def\u7684\u7ec8\u7aef\u64cd\u4f5c\u3002<\/p>\n
Java \u6d41\u793a\u4f8b<\/h3>\n
\u6211\u5df2\u7ecf\u6db5\u76d6\u4e86Java 8 Stream API\u7684\u51e0\u4e4e\u6240\u6709\u91cd\u8981\u90e8\u5206\u3002\u4f7f\u7528\u8fd9\u4e2a\u65b0API\u7684\u7279\u6027\u771f\u662f\u4ee4\u4eba\u5174\u594b\uff0c\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e9bJava\u6d41\u793a\u4f8b\u6765\u770b\u5b83\u7684\u5b9e\u9645\u6548\u679c\u3002<\/p>\n
\u521b\u5efaJava\u6d41\u3002<\/h4>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u65b9\u5f0f\u4ece\u6570\u7ec4\u548c\u96c6\u5408\u4e2d\u521b\u5efaJava\u6d41\u3002\u8ba9\u6211\u4eec\u901a\u8fc7\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u4e86\u89e3\u8fd9\u4e9b\u65b9\u5f0f\u3002<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Stream.of()\u4ece\u76f8\u4f3c\u7c7b\u578b\u7684\u6570\u636e\u4e2d\u521b\u5efa\u6d41\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u4e00\u7ec4int\u6216Integer\u5bf9\u8c61\u4e2d\u521b\u5efaJava Stream\u7684\u6574\u6570\u6d41\u3002
\nStream stream = Stream.of(1,2,3,4);<\/p>\n\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Stream.of()\u548c\u4e00\u4e2a\u5bf9\u8c61\u6570\u7ec4\u6765\u8fd4\u56de\u6d41\u3002\u8bf7\u6ce8\u610f\uff0c\u5b83\u4e0d\u652f\u6301\u81ea\u52a8\u88c5\u7bb1\uff0c\u6240\u4ee5\u6211\u4eec\u4e0d\u80fd\u4f20\u9012\u57fa\u672c\u7c7b\u578b\u7684\u6570\u7ec4\u3002
\nStream stream = Stream.of(new Integer[]{1,2,3,4}); \/\/\u8fd0\u884c\u6b63\u5e38<\/p>\nStream stream1 = Stream.of(new int[]{1,2,3,4}); \/\/\u7f16\u8bd1\u65f6\u9519\u8bef\uff0c\u7c7b\u578b\u4e0d\u5339\u914d\uff1a\u65e0\u6cd5\u5c06Stream\u8f6c\u6362\u4e3aStream<\/p>\n\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Collection\u7684stream()\u65b9\u6cd5\u521b\u5efa\u987a\u5e8f\u6d41\uff0c\u7528parallelStream()\u65b9\u6cd5\u521b\u5efa\u5e76\u884c\u6d41\u3002
\nList myList = new ArrayList<>();
\nfor(int i=0; i<100; i++) myList.add(i);\n\t\t\n\/\/\u987a\u5e8f\u6d41\nStream sequentialStream = myList.stream();<\/p>\n\/\/\u5e76\u884c\u6d41
\nStream parallelStream = myList.parallelStream();<\/p>\n\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Stream.generate()\u548cStream.iterate()\u65b9\u6cd5\u521b\u5efa\u6d41\u3002
\nStream stream1 = Stream.generate(() -> {return “abc”;});
\nStream stream2 = Stream.iterate(“abc”, (i) -> i);<\/p>\n\u4f7f\u7528Arrays.stream()\u548cString.chars()\u65b9\u6cd5\u3002
\nLongStream is = Arrays.stream(new long[]{1,2,3,4});
\nIntStream is2 = “abc”.chars();<\/ol>\n
\u5c06Java\u6d41\u8f6c\u6362\u4e3a\u96c6\u5408\u6216\u6570\u7ec4<\/h4>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u65b9\u5f0f\u4eceJava Stream\u4e2d\u83b7\u53d6Collection\u6216Array\u3002<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Java Stream\u7684collect()\u65b9\u6cd5\u4ece\u6d41\u4e2d\u83b7\u53d6List\u3001Map\u6216Set\u3002
\nStream intStream = Stream.of(1,2,3,4);
\nList intList = intStream.collect(Collectors.toList());
\nSystem.out.println(intList); \/\/\u6253\u5370\u7ed3\u679c\u4e3a [1, 2, 3, 4]<\/p>\nintStream = Stream.of(1,2,3,4); \/\/\u6d41\u5df2\u5173\u95ed\uff0c\u6240\u4ee5\u9700\u8981\u91cd\u65b0\u521b\u5efa
\nMap intMap = intStream.collect(Collectors.toMap(i -> i, i -> i+10));
\nSystem.out.println(intMap); \/\/\u6253\u5370\u7ed3\u679c\u4e3a {1=11, 2=12, 3=13, 4=14}<\/p>\n\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528stream\u7684toArray()\u65b9\u6cd5\u4ece\u6d41\u4e2d\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u3002
\nStream intStream = Stream.of(1,2,3,4);
\nInteger[] intArray = intStream.toArray(Integer[]::new);
\nSystem.out.println(Arrays.toString(intArray)); \/\/\u6253\u5370\u7ed3\u679c\u4e3a [1, 2, 3, 4]<\/ol>\nJava \u6d41\u7684\u4e2d\u95f4\u64cd\u4f5c<\/h3>\n
\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5e38\u7528\u7684Java\u6d41\u4e2d\u95f4\u64cd\u4f5c\u793a\u4f8b\u3002<\/p>\n
stream filter()\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528filter()\u65b9\u6cd5\u6765\u6d4b\u8bd5\u6d41\u5143\u7d20\u662f\u5426\u6ee1\u8db3\u6761\u4ef6\uff0c\u5e76\u751f\u6210\u4e00\u4e2a\u8fc7\u6ee4\u540e\u7684\u5217\u8868\u3002
\nList myList = new ArrayList<>();
\nfor(int i=0; i<100; i++) myList.add(i);\nStream sequentialStream = myList.stream();<\/p>\nStream highNums = sequentialStream.filter(p -> p > 90); \/\/\u8fc7\u6ee4\u5927\u4e8e90\u7684\u6570\u5b57
\nSystem.out.print(“\u9ad8\u4e8e90\u7684\u6570\u5b57=”);
\nhighNums.forEach(p -> System.out.print(p+” “));
\n\/\/\u8f93\u51fa “\u9ad8\u4e8e90\u7684\u6570\u5b57=91 92 93 94 95 96 97 98 99 ”<\/p>\nStream map()\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528map()\u65b9\u6cd5\u5c06\u51fd\u6570\u5e94\u7528\u4e8e\u6d41\u3002\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u5c06\u5176\u5e94\u7528\u4e8e\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\u6765\u8fdb\u884c\u5927\u5199\u8f6c\u6362\u3002
\nStream names = Stream.of(“aBc”, “d”, “ef”);
\nSystem.out.println(names.map(s -> {
\n\t\treturn s.toUpperCase();
\n\t}).collect(Collectors.toList()));
\n\/\/\u8f93\u51fa [ABC, D, EF]<\/p>\nStream sorted()\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528sorted()\u65b9\u6cd5\u901a\u8fc7\u4f20\u9012Comparator\u53c2\u6570\u6765\u5bf9\u6d41\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002
\nStream names2 = Stream.of(“aBc”, “d”, “ef”, “123456”);
\nList reverseSorted = names2.sorted(Comparator.reverseOrder()).collect(Collectors.toList());
\nSystem.out.println(reverseSorted); \/\/ \u8f93\u51fa [ef, d, aBc, 123456]<\/p>\nStream names3 = Stream.of(“aBc”, “d”, “ef”, “123456”);
\nList naturalSorted = names3.sorted().collect(Collectors.toList());
\nSystem.out.println(naturalSorted); \/\/\u8f93\u51fa [123456, aBc, d, ef]<\/p>\nStream flatMap()\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528flatMap()\u65b9\u6cd5\u4ece\u5217\u8868\u6d41\u4e2d\u521b\u5efa\u4e00\u4e2a\u6d41\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u6765\u6d88\u9664\u8fd9\u79cd\u7591\u60d1\u3002
\nStream> namesOriginalList = Stream.of(
\n\tArrays.asList(“Pankaj”),
\n\tArrays.asList(“David”, “Lisa”),
\n\tArrays.asList(“Amit”));
\n\/\/\u5c06\u6d41\u4eceList\u8f6c\u6362\u4e3aString\u6d41
\nStream flatStream = namesOriginalList
\n\t.flatMap(strList -> strList.stream());<\/p>\nflatStream.forEach(System.out::println);<\/ol>\n
Java Stream \u7ec8\u7aef\u64cd\u4f5c<\/h3>\n
\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e9bJava\u6d41\u7ec8\u7aef\u64cd\u4f5c\u7684\u793a\u4f8b\u3002<\/p>\n
\u6d41reduce\uff08\uff09\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528reduce\uff08\uff09\u5bf9\u6d41\u7684\u5143\u7d20\u6267\u884c\u7ea6\u7b80\u64cd\u4f5c\uff0c\u4f7f\u7528\u53ef\u5173\u8054\u7684\u7d2f\u79ef\u51fd\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2aOptional\u3002\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u4f7f\u7528\u5b83\u6765\u5bf9\u6d41\u4e2d\u7684\u6574\u6570\u8fdb\u884c\u4e58\u6cd5\u8fd0\u7b97\u3002
\nStream numbers = Stream.of\uff081,2,3,4,5\uff09;
\nOptional intOptional = numbers.reduce\uff08\uff08i\uff0cj\uff09 – > {return i * j;}\uff09;
\nif\uff08intOptional.isPresent\uff08\uff09\uff09System.out.println\uff08”\u4e58\u6cd5 =” + intOptional.get\uff08\uff09\uff09; \/\/120<\/p>\n\u6d41\u8ba1\u6570\uff08\uff09\u793a\u4f8b\uff1a\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u7ec8\u7aef\u64cd\u4f5c\u6765\u8ba1\u7b97\u6d41\u4e2d\u7684\u9879\u76ee\u6570\u3002
\nStream numbers1 = Stream.of\uff081,2,3,4,5\uff09;
\nSystem.out.println\uff08”\u6d41\u4e2d\u7684\u5143\u7d20\u6570=” + numbers1.count\uff08\uff09\uff09; \/\/5<\/p>\n\u6d41forEach\uff08\uff09\u793a\u4f8b\uff1a\u8fd9\u53ef\u4ee5\u7528\u4e8e\u8fed\u4ee3\u6d41\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u7528\u4e8e\u6253\u5370\u6d41\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n
Stream numbers2 = Stream.of\uff081,2,3,4,5\uff09;
\nnumbers2.forEach\uff08i – > System.out.print\uff08i +\u201c\uff0c\u201d\uff09\uff09; \/\/1,2,3,4,5\uff0c<\/p>\n\u6d41\u5339\u914d\uff08\uff09\u793a\u4f8b\uff1a\u8ba9\u6211\u4eec\u770b\u4e00\u4e9bStream API\u4e2d\u5339\u914d\u65b9\u6cd5\u7684\u793a\u4f8b\u3002<\/p>\n
Stream numbers3 = Stream.of\uff081,2,3,4,5\uff09;
\nSystem.out.println\uff08”\u6d41\u4e2d\u5305\u542b4\u5417\uff1f”+ numbers3.anyMatch\uff08i – > i == 4\uff09\uff09;
\n\/\/\u6d41\u4e2d\u5305\u542b4\u5417\uff1f \u771f\u7684<\/p>\nStream numbers4 = Stream.of\uff081,2,3,4,5\uff09;
\nSystem.out.println\uff08”\u6d41\u4e2d\u5305\u542b\u6240\u6709\u5c0f\u4e8e10\u7684\u5143\u7d20\u5417\uff1f”+ numbers4.allMatch\uff08i – > i <10\uff09\uff09;\n\/\/\u6d41\u4e2d\u5305\u542b\u6240\u6709\u5c0f\u4e8e10\u7684\u5143\u7d20\u5417\uff1f\u771f\u7684\n\nStream numbers5 = Stream.of\uff081,2,3,4,5\uff09;
\nSystem.out.println\uff08”\u6d41\u4e2d\u4e0d\u5305\u542b10\u5417\uff1f”+ numbers5.noneMatch\uff08i – > i == 10\uff09\uff09\uff1b
\n\/\/\u6d41\u4e0d\u5305\u542b10\u5417\uff1f\u771f\u7684<\/p>\nfindFirst\uff08\uff09\u793a\u4f8b\uff1a\u8fd9\u662f\u4e00\u4e2a\u77ed\u8def\u7ec8\u7aef\u64cd\u4f5c\uff0c\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u4f7f\u7528\u5b83\u4ece\u4ee5D\u5f00\u5934\u7684\u6d41\u4e2d\u627e\u5230\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n
Stream names4 = Stream.of\uff08”Pankaj”\uff0c\u201cAmit\u201d\uff0c\u201cDavid\u201d\uff0c\u201cLisa\u201d\uff09;
\nOptional firstNameWithD = names4.filter\uff08i – > i.startsWith\uff08\u201cD\u201d\uff09\uff09\u3002findFirst\uff08\uff09;
\nif\uff08firstNameWithD.isPresent\uff08\uff09\uff09{
\n\tSystem.out.println\uff08”\u4ee5D\u5f00\u5934\u7684\u540d\u5b57=”+ firstNameWithD.get\uff08\uff09\uff09; \/\/\u5927\u536b
\n}<\/ol>\nJava 8 \u6d41API\u7684\u9650\u5236<\/h3>\n
Java 8 Stream API \u5e26\u6765\u4e86\u8bb8\u591a\u65b0\u7684\u529f\u80fd\uff0c\u53ef\u7528\u4e8e\u5904\u7406\u5217\u8868\u548c\u6570\u7ec4\uff0c\u4f46\u5b83\u4e5f\u6709\u4e00\u4e9b\u9650\u5236\u3002<\/p>\n
\u65e0\u72b6\u6001\u7684lambda\u8868\u8fbe\u5f0f\uff1a\u5982\u679c\u4f60\u6b63\u5728\u4f7f\u7528\u5e76\u884c\u6d41\uff0c\u800clambda\u8868\u8fbe\u5f0f\u662f\u6709\u72b6\u6001\u7684\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u968f\u673a\u7684\u54cd\u5e94\u3002\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u3002StatefulParallelStream.java<\/p>\n“`
\npackage com.Olivia.java8.stream;<\/p>\n
import java.util.ArrayList;
\nimport java.util.Arrays;
\nimport java.util.List;
\nimport java.util.stream.Stream;<\/p>\n
public class StatefulParallelStream {<\/p>\n
\tpublic static void main(String[] args) {<\/p>\n
\t\tList ss = Arrays.asList(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
\n\t\tList result = new ArrayList();<\/p>\n\t\tStream stream = ss.parallelStream();<\/p>\n\t\tstream.map(s -> {
\n\t\t synchronized (result) {
\n\t\t if (result.size() < 10) {\n\t\t result.add(s);\n\t\t }\n\t\t }\n\t\t\t\treturn s;\n\t\t }).forEach( e -> {});
\n\t\t System.out.println(result);
\n\t}
\n}<\/p>\n
“`<\/p>\n
\u5982\u679c\u6211\u4eec\u8fd0\u884c\u4e0a\u8ff0\u7a0b\u5e8f\uff0c\u4f1a\u5f97\u5230\u4e0d\u540c\u7684\u7ed3\u679c\uff0c\u56e0\u4e3a\u5b83\u53d6\u51b3\u4e8e\u6d41\u7684\u8fed\u4ee3\u65b9\u5f0f\uff0c\u5e76\u4e14\u5bf9\u4e8e\u5e76\u884c\u5904\u7406\uff0c\u6211\u4eec\u6ca1\u6709\u5b9a\u4e49\u4efb\u4f55\u987a\u5e8f\u3002\u5982\u679c\u6211\u4eec\u4f7f\u7528\u987a\u5e8f\u6d41\uff0c\u5219\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
\u4e00\u65e6\u6d41\u88ab\u6d88\u8017\uff0c\u5c31\u4e0d\u80fd\u518d\u6b21\u4f7f\u7528\u3002\u5982\u60a8\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\u770b\u5230\u7684\uff0c\u6bcf\u6b21\u6211\u90fd\u5728\u521b\u5efa\u4e00\u4e2a\u6d41\u3002<\/p>\n
\u5728Stream API\u4e2d\u6709\u5f88\u591a\u65b9\u6cd5\uff0c\u6700\u4ee4\u4eba\u56f0\u60d1\u7684\u90e8\u5206\u662f\u65b9\u6cd5\u7684\u91cd\u8f7d\u3002\u8fd9\u4f7f\u5f97\u5b66\u4e60\u66f2\u7ebf\u53d8\u5f97\u5f88\u6f2b\u957f\u3002<\/ol>\n
\u8fd9\u5c31\u662f\u5173\u4e8eJava 8 Stream\u793a\u4f8b\u6559\u7a0b\u7684\u5168\u90e8\u5185\u5bb9\u3002\u6211\u671f\u5f85\u7740\u4f7f\u7528\u8fd9\u4e2a\u7279\u6027\uff0c\u5e76\u901a\u8fc7\u5e76\u884c\u5904\u7406\u4f7f\u4ee3\u7801\u53d8\u5f97\u66f4\u6613\u8bfb\u4e14\u6027\u80fd\u66f4\u597d\u3002\u53c2\u8003\u8d44\u6599\uff1aJava Stream API\u6587\u6863\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6b22\u8fce\u6765\u5230Java 8 Stream API\u6559\u7a0b\u3002\u5728\u8fc7\u53bb\u7684\u51e0\u7bc7Java 8\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86Java 8\u63a5\u53e3\u7684\u53d8 […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50724","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n
Java 8 \u6d41 - Java \u6d41 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-\u6d41-java-\u6d41\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java 8 \u6d41 - Java \u6d41\" \/>\n<meta property=\"og:description\" content=\"\u6b22\u8fce\u6765\u5230Java 8 Stream API\u6559\u7a0b\u3002\u5728\u8fc7\u53bb\u7684\u51e0\u7bc7Java 8\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86Java 8\u63a5\u53e3\u7684\u53d8 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-\u6d41-java-\u6d41\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-23T02:31:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-23T07:35:12+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5b87, \u534e\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/\",\"name\":\"Java 8 \u6d41 - Java \u6d41 - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-12-23T02:31:39+00:00\",\"dateModified\":\"2023-12-23T07:35:12+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java 8 \u6d41 – Java \u6d41\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458\",\"name\":\"\u5b87, \u534e\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g\",\"caption\":\"\u5b87, \u534e\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yuhua\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Java 8 \u6d41 - Java \u6d41 - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-\u6d41-java-\u6d41\/","og_locale":"zh_CN","og_type":"article","og_title":"Java 8 \u6d41 - Java \u6d41","og_description":"\u6b22\u8fce\u6765\u5230Java 8 Stream API\u6559\u7a0b\u3002\u5728\u8fc7\u53bb\u7684\u51e0\u7bc7Java 8\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86Java 8\u63a5\u53e3\u7684\u53d8 […]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-\u6d41-java-\u6d41\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-12-23T02:31:39+00:00","article_modified_time":"2023-12-23T07:35:12+00:00","author":"\u5b87, \u534e","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u5b87, \u534e","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"3 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/","name":"Java 8 \u6d41 - Java \u6d41 - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-12-23T02:31:39+00:00","dateModified":"2023-12-23T07:35:12+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458"},"breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"Java 8 \u6d41 – Java \u6d41"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458","name":"\u5b87, \u534e","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g","caption":"\u5b87, \u534e"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/yuhua\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java-8-%e6%b5%81-java-%e6%b5%81\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/50724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=50724"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/50724\/revisions"}],"predecessor-version":[{"id":50807,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/50724\/revisions\/50807"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=50724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=50724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=50724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}