ExecutorService

最新推荐文章于 2024-09-19 08:46:32 发布

原创最新推荐文章于 2024-09-19 08:46:32 发布 · 302 阅读

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本文通过一个具体的Java代码示例介绍了如何使用ExecutorService创建固定大小的线程池，并展示了如何通过submit方法提交Callable任务获取返回结果。

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线程执行器

public class ExecutorServiceClient {

    public static void main(String[] args) throws ExecutionException, InterruptedException {

        ExecutorService executorService = Executors.newFixedThreadPool(5);
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        Future future = executorService.submit(() -> System.out.println(Thread.currentThread().getName()));
        System.out.println("future------" + future.get());
        future = executorService.submit(() -> {
            System.out.println(Thread.currentThread().getName());
            return "我也是Callable";
        });
        System.out.println("future------" + future.get());
        future = executorService.submit(() -> {
            System.out.println(Thread.currentThread().getName());
            return "我是Callable";
        });
        System.out.println("future------" + future.get());
        executorService.submit(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.execute(() -> System.out.println(Thread.currentThread().getName()));
        executorService.shutdown();
    }
}

pool-1-thread-1
pool-1-thread-2
pool-1-thread-3
future------null
pool-1-thread-4
future------我也是Callable
pool-1-thread-5
future------我是Callable
pool-1-thread-1
pool-1-thread-2
pool-1-thread-3
pool-1-thread-4
pool-1-thread-5
pool-1-thread-1
pool-1-thread-2