{"id":1791,"date":"2023-03-27T22:32:34","date_gmt":"2023-03-27T14:32:34","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1791"},"modified":"2023-04-23T21:14:10","modified_gmt":"2023-04-23T13:14:10","slug":"completefuture-usage-details","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/27\/completefuture-usage-details\/","title":{"rendered":"CompletableFuture \u4f7f\u7528\u8be6\u89e3"},"content":{"rendered":"

runAsync \u548c supplyAsync\u65b9\u6cd5<\/h3>\n

CompletableFuture \u63d0\u4f9b\u4e86\u56db\u4e2a\u9759\u6001\u65b9\u6cd5\u6765\u521b\u5efa\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\u3002<\/p>\n

public static CompletableFuture<Void> runAsync(Runnable runnable)\npublic static CompletableFuture<Void> runAsync(Runnable runnable, Executor executor)\npublic static <U> CompletableFuture<U> supplyAsync(Supplier<U> supplier)\npublic static <U> CompletableFuture<U> supplyAsync(Supplier<U> supplier, Executor executor)<\/code><\/pre>\n
<\/p>\n
\u6ca1\u6709\u6307\u5b9aExecutor\u7684\u65b9\u6cd5\u4f1a\u4f7f\u7528ForkJoinPool.commonPool()<\/code>\u4f5c\u4e3a\u5b83\u7684\u7ebf\u7a0b\u6c60\u6267\u884c\u5f02\u6b65\u4ee3\u7801\u3002\u5982\u679c\u6307\u5b9a\u7ebf\u7a0b\u6c60\uff0c\u5219\u4f7f\u7528\u6307\u5b9a\u7684\u7ebf\u7a0b\u6c60\u8fd0\u884c\u3002\u4ee5\u4e0b\u6240\u6709\u7684\u65b9\u6cd5\u90fd\u7c7b\u540c\u3002<\/p>\n
    \n
  • runAsync<\/code>\u65b9\u6cd5\u4e0d\u652f\u6301\u8fd4\u56de\u503c<\/li>\n
  • supplyAsync<\/code>\u53ef\u4ee5\u652f\u6301\u8fd4\u56de\u503c<\/li>\n<\/ul>\n
    \/\/\u65e0\u8fd4\u56de\u503c\npublic static void runAsync() throws Exception {\n    CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {\n        try {\n            TimeUnit.SECONDS.sleep(1);\n        } catch (InterruptedException e) {\n        }\n        System.out.println("run end ...");\n    });\n\n    future.get();\n}\n\n\/\/\u6709\u8fd4\u56de\u503c\npublic static void supplyAsync() throws Exception {         \n    CompletableFuture<Long> future = CompletableFuture.supplyAsync(() -> {\n        try {\n            TimeUnit.SECONDS.sleep(1);\n        } catch (InterruptedException e) {\n        }\n        System.out.println("run end ...");\n        return System.currentTimeMillis();\n    });\n\n    long time = future.get();\n    System.out.println("time = "+time);\n}<\/code><\/pre>\n
    \u8ba1\u7b97\u7ed3\u679c\u5b8c\u6210\u65f6\u7684\u56de\u8c03\u65b9\u6cd5<\/h3>\n
    \u5f53CompletableFuture\u7684\u8ba1\u7b97\u7ed3\u679c\u5b8c\u6210\uff0c\u6216\u8005\u629b\u51fa\u5f02\u5e38\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u6267\u884c\u7279\u5b9a\u7684Action\u3002\u4e3b\u8981\u662f\u4e0b\u9762\u7684\u65b9\u6cd5\uff1a<\/p>\n
    public CompletableFuture<T> whenComplete(BiConsumer<? super T, ? super Throwable> action)\npublic CompletableFuture<T> whenCompleteAsync(BiConsumer<? super T, ? super Throwable> action)\npublic CompletableFuture<T> whenCompleteAsync(BiConsumer<? super T, ? super Throwable> action, Executor executor)\npublic CompletableFuture<T> exceptionally(Function<Throwable, ? extends T> fn)<\/code><\/pre>\n
    \u53ef\u4ee5\u770b\u5230Action\u7684\u7c7b\u578b\u662fBiConsumer<? super T, ? super Throwable><\/code>\u5b83\u53ef\u4ee5\u5904\u7406\u6b63\u5e38\u7684\u8ba1\u7b97\u7ed3\u679c\uff0c\u6216\u8005\u5f02\u5e38\u60c5\u51b5\u3002<\/p>\n
    whenComplete<\/code>\u548cwhenCompleteAsync<\/code>\u7684\u533a\u522b\uff1a<\/p>\n
      \n
    • whenComplete<\/code>\uff1a\u662f\u6267\u884c\u5f53\u524d\u4efb\u52a1\u7684\u7ebf\u7a0b\u6267\u884c\u7ee7\u7eed\u6267\u884cwhenComplete<\/code>\u7684\u4efb\u52a1<\/li>\n
    • whenCompleteAsync<\/code>\uff1a\u662f\u6267\u884c\u628awhenCompleteAsync<\/code>\u8fd9\u4e2a\u4efb\u52a1\u7ee7\u7eed\u63d0\u4ea4\u7ed9\u7ebf\u7a0b\u6c60\u6765\u8fdb\u884c\u6267\u884c<\/li>\n<\/ul>\n
      public static void whenComplete() throws Exception {\n    CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {\n        try {\n            TimeUnit.SECONDS.sleep(1);\n        } catch (InterruptedException e) {\n        }\n        if(new Random().nextInt()%2 >= 0) {\n            int i = 12\/0;\n        }\n        System.out.println("run end ...");\n    });\n\n    future.whenComplete(new BiConsumer<Void, Throwable>() {\n        @Override\n        public void accept(Void t, Throwable action) {\n            System.out.println("\u6267\u884c\u5b8c\u6210\uff01");\n        }\n\n    });\n    future.exceptionally(new Function<Throwable, Void>() {\n        @Override\n        public Void apply(Throwable t) {\n            System.out.println("\u6267\u884c\u5931\u8d25\uff01" + t.getMessage());\n            return null;\n        }\n    });\n\n    TimeUnit.SECONDS.sleep(2);\n}<\/code><\/pre>\n
      thenApply \u65b9\u6cd5<\/h3>\n
      \u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4f9d\u8d56\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528thenApply<\/code>\u65b9\u6cd5\u6765\u628a\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u4e32\u884c\u5316\u3002<\/p>\n
      public <U> CompletableFuture<U> thenApply(Function<? super T, ? extends U> fn)\npublic <U> CompletableFuture<U> thenApplyAsync(Function<? super T, ? extends U> fn)\npublic <U> CompletableFuture<U> thenApplyAsync(Function<? super T, ? extends U> fn, Executor executor)<\/code><\/pre>\n
      Function<? super T,? extends U><\/code><\/p>\n
        \n
      • T\uff1a\u4e0a\u4e00\u4e2a\u4efb\u52a1\u8fd4\u56de\u7ed3\u679c\u7684\u7c7b\u578b<\/li>\n
      • U\uff1a\u5f53\u524d\u4efb\u52a1\u7684\u8fd4\u56de\u503c\u7c7b\u578b<\/li>\n<\/ul>\n
        private static void thenApply() throws Exception {\n    CompletableFuture<Long> future = CompletableFuture.supplyAsync(new Supplier<Long>() {\n        @Override\n        public Long get() {\n            long result = new Random().nextInt(100);\n            System.out.println("result1=" + result);\n            return result;\n        }\n    }).thenApply(new Function<Long, Long>() {\n        @Override\n        public Long apply(Long t) {\n            long result = t*5;\n            System.out.println("result2=" + result);\n            return result;\n        }\n    });\n\n    long result = future.get();\n    System.out.println(result);\n}<\/code><\/pre>\n
        \u7b2c\u4e8c\u4e2a\u4efb\u52a1\u4f9d\u8d56\u7b2c\u4e00\u4e2a\u4efb\u52a1\u7684\u7ed3\u679c\u3002<\/p>\n
        handle \u65b9\u6cd5<\/h3>\n
          \n
        • handle<\/code>\u662f\u6267\u884c\u4efb\u52a1\u5b8c\u6210\u65f6\u5bf9\u7ed3\u679c\u7684\u5904\u7406<\/li>\n
        • handle<\/code>\u65b9\u6cd5\u548cthenApply<\/code>\u65b9\u6cd5\u5904\u7406\u65b9\u5f0f\u57fa\u672c\u4e00\u6837\u3002\u4e0d\u540c\u7684\u662fhandle<\/code>\u662f\u5728\u4efb\u52a1\u5b8c\u6210\u540e\u518d\u6267\u884c\uff0c\u8fd8\u53ef\u4ee5\u5904\u7406\u5f02\u5e38\u7684\u4efb\u52a1\u3002thenApply<\/code>\u53ea\u53ef\u4ee5\u6267\u884c\u6b63\u5e38\u7684\u4efb\u52a1\uff0c\u4efb\u52a1\u51fa\u73b0\u5f02\u5e38\u5219\u4e0d\u6267\u884cthenApply<\/code>\u65b9\u6cd5<\/li>\n<\/ul>\n
          public <U> CompletionStage<U> handle(BiFunction<? super T, Throwable, ? extends U> fn);\npublic <U> CompletionStage<U> handleAsync(BiFunction<? super T, Throwable, ? extends U> fn);\npublic <U> CompletionStage<U> handleAsync(BiFunction<? super T, Throwable, ? extends U> fn,Executor executor);<\/code><\/pre>\n
          public static void handle() throws Exception{\n    CompletableFuture<Integer> future = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n\n        @Override\n        public Integer get() {\n            int i= 10\/0;\n            return new Random().nextInt(10);\n        }\n    }).handle(new BiFunction<Integer, Throwable, Integer>() {\n        @Override\n        public Integer apply(Integer param, Throwable throwable) {\n            int result = -1;\n            if (throwable == null) {\n                result = param * 2;\n            } else {\n                System.out.println(throwable.getMessage());\n            }\n            return result;\n        }\n    });\n    System.out.println(future.get());\n}<\/code><\/pre>\n
          \u4ece\u793a\u4f8b\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5728handle<\/code>\u4e2d\u53ef\u4ee5\u6839\u636e\u4efb\u52a1\u662f\u5426\u6709\u5f02\u5e38\u6765\u8fdb\u884c\u505a\u76f8\u5e94\u7684\u540e\u7eed\u5904\u7406\u64cd\u4f5c\u3002\u800cthenApply<\/code>\u65b9\u6cd5\uff0c\u5982\u679c\u4e0a\u4e2a\u4efb\u52a1\u51fa\u73b0\u9519\u8bef\uff0c\u5219\u4e0d\u4f1a\u6267\u884cthenApply<\/code>\u65b9\u6cd5\u3002<\/p>\n
          thenAccept \u6d88\u8d39\u5904\u7406\u7ed3\u679c<\/h3>\n
          \u63a5\u6536\u4efb\u52a1\u7684\u5904\u7406\u7ed3\u679c\uff0c\u5e76\u6d88\u8d39\u5904\u7406\uff0c\u65e0\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n
          public CompletionStage<Void> thenAccept(Consumer<? super T> action);\npublic CompletionStage<Void> thenAcceptAsync(Consumer<? super T> action);\npublic CompletionStage<Void> thenAcceptAsync(Consumer<? super T> action,Executor executor);<\/code><\/pre>\n
          public static void thenAccept() throws Exception{\n    CompletableFuture<Void> future = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            return new Random().nextInt(10);\n        }\n    }).thenAccept(integer -> {\n        System.out.println(integer);\n    });\n    future.get();\n}<\/code><\/pre>\n
          \u4ece\u793a\u4f8b\u4ee3\u7801\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u8be5\u65b9\u6cd5\u53ea\u662f\u6d88\u8d39\u6267\u884c\u5b8c\u6210\u7684\u4efb\u52a1\uff0c\u5e76\u53ef\u4ee5\u6839\u636e\u4e0a\u9762\u7684\u4efb\u52a1\u8fd4\u56de\u7684\u7ed3\u679c\u8fdb\u884c\u5904\u7406\u3002\u5e76\u6ca1\u6709\u540e\u7eed\u7684\u8f93\u9519\u64cd\u4f5c\u3002<\/p>\n
          thenRun \u65b9\u6cd5<\/h3>\n
          \u8ddfthenAccept<\/code>\u65b9\u6cd5\u4e0d\u4e00\u6837\u7684\u662f\uff0c\u4e0d\u5173\u5fc3\u4efb\u52a1\u7684\u5904\u7406\u7ed3\u679c\u3002\u53ea\u8981\u4e0a\u9762\u7684\u4efb\u52a1\u6267\u884c\u5b8c\u6210\uff0c\u5c31\u5f00\u59cb\u6267\u884cthenRun<\/code>\u3002<\/p>\n
          public CompletionStage<Void> thenRun(Runnable action);\npublic CompletionStage<Void> thenRunAsync(Runnable action);\npublic CompletionStage<Void> thenRunAsync(Runnable action,Executor executor);<\/code><\/pre>\n
          public static void thenRun() throws Exception{\n    CompletableFuture<Void> future = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            return new Random().nextInt(10);\n        }\n    }).thenRun(() -> {\n        System.out.println("thenRun ...");\n    });\n    future.get();\n}<\/code><\/pre>\n
          \u8be5\u65b9\u6cd5\u540cthenAccept<\/code>\u65b9\u6cd5\u7c7b\u4f3c\u3002\u4e0d\u540c\u7684\u662f\u4e0a\u4e2a\u4efb\u52a1\u5904\u7406\u5b8c\u6210\u540e\uff0c\u5e76\u4e0d\u4f1a\u628a\u8ba1\u7b97\u7684\u7ed3\u679c\u4f20\u7ed9thenRun<\/code>\u65b9\u6cd5\u3002\u53ea\u662f\u5904\u7406\u73a9\u4efb\u52a1\u540e\uff0c\u6267\u884cthenAccept<\/code>\u7684\u540e\u7eed\u64cd\u4f5c\u3002<\/p>\n
          thenCombine \u5408\u5e76\u4efb\u52a1<\/h3>\n
          thenCombine<\/code>\u4f1a\u628a\u4e24\u4e2aCompletionStage<\/code>\u7684\u4efb\u52a1\u90fd\u6267\u884c\u5b8c\u6210\u540e\uff0c\u628a\u4e24\u4e2a\u4efb\u52a1\u7684\u7ed3\u679c\u4e00\u5757\u4ea4\u7ed9thenCombine<\/code>\u6765\u5904\u7406\u3002<\/p>\n
          public <U,V> CompletionStage<V> thenCombine(CompletionStage<? extends U> other, BiFunction<? super T, ? super U, ? extends V> fn);\npublic <U,V> CompletionStage<V> thenCombineAsync(CompletionStage<? extends U> other, BiFunction<? super T, ? super U, ? extends V> fn);\npublic <U,V> CompletionStage<V> thenCombineAsync(CompletionStage<? extends U> other, BiFunction<? super T, ? super U, ? extends V> fn, Executor executor);<\/code><\/pre>\n
          private static void thenCombine() throws Exception {\n    CompletableFuture<String> future1 = CompletableFuture.supplyAsync(new Supplier<String>() {\n        @Override\n        public String get() {\n            return "hello";\n        }\n    });\n    CompletableFuture<String> future2 = CompletableFuture.supplyAsync(new Supplier<String>() {\n        @Override\n        public String get() {\n            return "hello";\n        }\n    });\n    CompletableFuture<String> result = future1.thenCombine(future2, new BiFunction<String, String, String>() {\n        @Override\n        public String apply(String t, String u) {\n            return t + " " + u;\n        }\n    });\n    System.out.println(result.get());\n}<\/code><\/pre>\n
          thenAcceptBoth<\/h3>\n
          \u5f53\u4e24\u4e2aCompletionStage\u90fd\u6267\u884c\u5b8c\u6210\u540e\uff0c\u628a\u7ed3\u679c\u4e00\u5757\u4ea4\u7ed9thenAcceptBoth<\/code>\u6765\u8fdb\u884c\u6d88\u8017<\/p>\n
          public <U> CompletionStage<Void> thenAcceptBoth(CompletionStage<? extends U> other, BiConsumer<? super T, ? super U> action);\npublic <U> CompletionStage<Void> thenAcceptBothAsync(CompletionStage<? extends U> other, BiConsumer<? super T, ? super U> action);\npublic <U> CompletionStage<Void> thenAcceptBothAsync(CompletionStage<? extends U> other, BiConsumer<? super T, ? super U> action, Executor executor);<\/code><\/pre>\n
          private static void thenAcceptBoth() throws Exception {\n    CompletableFuture<Integer> f1 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f1=" + t);\n            return t;\n        }\n    });\n\n    CompletableFuture<Integer> f2 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f2=" + t);\n            return t;\n        }\n    });\n    f1.thenAcceptBoth(f2, new BiConsumer<Integer, Integer>() {\n        @Override\n        public void accept(Integer t, Integer u) {\n            System.out.println("f1=" + t + "; f2=" + u + ";");\n        }\n    });\n}<\/code><\/pre>\n
          applyToEither \u65b9\u6cd5<\/h3>\n
          \u4e24\u4e2aCompletionStage\uff0c\u8c01\u6267\u884c\u8fd4\u56de\u7684\u7ed3\u679c\u5feb\uff0c\u5c31\u7528\u90a3\u4e2aCompletionStage\u7684\u7ed3\u679c\u8fdb\u884c\u4e0b\u4e00\u6b65\u7684\u8f6c\u5316\u64cd\u4f5c\u3002<\/p>\n
          public <U> CompletionStage<U> applyToEither(CompletionStage<? extends T> other, Function<? super T, U> fn);\npublic <U> CompletionStage<U> applyToEitherAsync(CompletionStage<? extends T> other, Function<? super T, U> fn);\npublic <U> CompletionStage<U> applyToEitherAsync(CompletionStage<? extends T> other, Function<? super T, U> fn, Executor executor);<\/code><\/pre>\n
          private static void applyToEither() throws Exception {\n    CompletableFuture<Integer> f1 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f1="+t);\n            return t;\n        }\n    });\n    CompletableFuture<Integer> f2 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f2="+t);\n            return t;\n        }\n    });\n\n    CompletableFuture<Integer> result = f1.applyToEither(f2, new Function<Integer, Integer>() {\n        @Override\n        public Integer apply(Integer t) {\n            System.out.println(t);\n            return t * 2;\n        }\n    });\n\n    System.out.println(result.get());\n}<\/code><\/pre>\n
          acceptEither \u65b9\u6cd5<\/h3>\n
          \u4e24\u4e2aCompletionStage\uff0c\u8c01\u6267\u884c\u8fd4\u56de\u7684\u7ed3\u679c\u5feb\uff0c\u5c31\u7528\u90a3\u4e2aCompletionStage\u7684\u7ed3\u679c\u8fdb\u884c\u4e0b\u4e00\u6b65\u7684\u6d88\u8017\u64cd\u4f5c\u3002<\/p>\n
          public CompletionStage<Void> acceptEither(CompletionStage<? extends T> other, Consumer<? super T> action);\npublic CompletionStage<Void> acceptEitherAsync(CompletionStage<? extends T> other, Consumer<? super T> action);\npublic CompletionStage<Void> acceptEitherAsync(CompletionStage<? extends T> other, Consumer<? super T> action, Executor executor);<\/code><\/pre>\n
          private static void acceptEither() throws Exception {\n    CompletableFuture<Integer> f1 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f1="+t);\n            return t;\n        }\n    });\n\n    CompletableFuture<Integer> f2 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f2="+t);\n            return t;\n        }\n    });\n    f1.acceptEither(f2, new Consumer<Integer>() {\n        @Override\n        public void accept(Integer t) {\n            System.out.println(t);\n        }\n    });\n}<\/code><\/pre>\n
          runAfterEither \u65b9\u6cd5<\/h3>\n
          \u4e24\u4e2aCompletionStage\uff0c\u4efb\u4f55\u4e00\u4e2a\u5b8c\u6210\u4e86\u90fd\u4f1a\u6267\u884c\u4e0b\u4e00\u6b65\u7684\u64cd\u4f5c\uff08Runnable\uff09<\/p>\n
          public CompletionStage<Void> runAfterEither(CompletionStage<?> other, Runnable action);\npublic CompletionStage<Void> runAfterEitherAsync(CompletionStage<?> other, Runnable action);\npublic CompletionStage<Void> runAfterEitherAsync(CompletionStage<?> other, Runnable action, Executor executor);<\/code><\/pre>\n
          private static void runAfterEither() throws Exception {\n    CompletableFuture<Integer> f1 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f1=" + t);\n            return t;\n        }\n    });\n\n    CompletableFuture<Integer> f2 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f2=" + t);\n            return t;\n        }\n    });\n    f1.runAfterEither(f2, new Runnable() {\n        @Override\n        public void run() {\n            System.out.println("\u4e0a\u9762\u6709\u4e00\u4e2a\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002");\n        }\n    });\n}<\/code><\/pre>\n
          runAfterBoth<\/h3>\n
          \u4e24\u4e2aCompletionStage\uff0c\u90fd\u5b8c\u6210\u4e86\u8ba1\u7b97\u624d\u4f1a\u6267\u884c\u4e0b\u4e00\u6b65\u7684\u64cd\u4f5c\uff08Runnable\uff09<\/p>\n
          public CompletionStage<Void> runAfterBoth(CompletionStage<?> other, Runnable action);\npublic CompletionStage<Void> runAfterBothAsync(CompletionStage<?> other, Runnable action);\npublic CompletionStage<Void> runAfterBothAsync(CompletionStage<?> other, Runnable action, Executor executor);<\/code><\/pre>\n
          private static void runAfterBoth() throws Exception {\n    CompletableFuture<Integer> f1 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f1="+t);\n            return t;\n        }\n    });\n\n    CompletableFuture<Integer> f2 = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            try {\n                TimeUnit.SECONDS.sleep(t);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n            System.out.println("f2="+t);\n            return t;\n        }\n    });\n    f1.runAfterBoth(f2, new Runnable() {\n        @Override\n        public void run() {\n            System.out.println("\u4e0a\u9762\u4e24\u4e2a\u4efb\u52a1\u90fd\u6267\u884c\u5b8c\u6210\u4e86\u3002");\n        }\n    });\n}<\/code><\/pre>\n
          thenCompose \u65b9\u6cd5<\/h3>\n
          thenCompose<\/code>\u65b9\u6cd5\u5141\u8bb8\u5bf9\u4e24\u4e2a CompletionStage \u8fdb\u884c\u6d41\u6c34\u7ebf\u64cd\u4f5c\uff0c\u7b2c\u4e00\u4e2a\u64cd\u4f5c\u5b8c\u6210\u65f6\uff0c\u5c06\u5176\u7ed3\u679c\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u7b2c\u4e8c\u4e2a\u64cd\u4f5c\u3002<\/p>\n
          public <U> CompletableFuture<U> thenCompose(Function<? super T, ? extends CompletionStage<U>> fn);\npublic <U> CompletableFuture<U> thenComposeAsync(Function<? super T, ? extends CompletionStage<U>> fn) ;\npublic <U> CompletableFuture<U> thenComposeAsync(Function<? super T, ? extends CompletionStage<U>> fn, Executor executor) ;<\/code><\/pre>\n
          private static void thenCompose() throws Exception {\n    CompletableFuture<Integer> f = CompletableFuture.supplyAsync(new Supplier<Integer>() {\n        @Override\n        public Integer get() {\n            int t = new Random().nextInt(3);\n            System.out.println("t1=" + t);\n            return t;\n        }\n    }).thenCompose(new Function<Integer, CompletionStage<Integer>>() {\n        @Override\n        public CompletionStage<Integer> apply(Integer param) {\n            return CompletableFuture.supplyAsync(new Supplier<Integer>() {\n                @Override\n                public Integer get() {\n                    int t = param *2;\n                    System.out.println("t2=" + t);\n                    return t;\n                }\n            });\n        }\n    });\n    System.out.println("thenCompose result : " + f.get());\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
          runAsync \u548c supplyAsync\u65b9\u6cd5 CompletableFuture \u63d0\u4f9b\u4e86\u56db\u4e2a\u9759\u6001\u65b9\u6cd5\u6765\u521b\u5efa […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[455],"class_list":["post-1791","post","type-post","status-publish","format-standard","hentry","category-java-basic","tag-future"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1791"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1791\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}