试图围绕 Java 并发进行思考，并且很难理解线程池、线程和它们正在执行的可运行“任务”之间的关系。
如果我创建一个具有 10 个线程的线程池，那么我是否必须将相同的任务传递给池中的每个线程，或者池中的线程实际上只是与任务无关的“工作无人机”可用于执行任何任务？
无论哪种方式，Executor/ExecutorService 如何将正确的任务分配给正确的线程？
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通常，线程池是用一个生产者-消费者队列实现的，所有池线程都在等待任务。Executor 不必分配任务，它所要做的就是将它们推送到队列中。一些线程，一个“与任务无关的工作无人机”，将弹出任务，执行它的“run()”方法，完成后，循环循环以再次在队列中等待更多工作。
于 2012-04-30T01:07:52.190 回答
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If I create a thread pool with, say, 10 threads, then do I have to pass the same task to each thread in the pool, or are the pooled threads literally just task-agnostic "worker drones" available to execute any task?
More or less the latter. Any given task gets assigned to the next available thread.
Either way, how does an Executor/ExecutorService assign the right task to the right thread?
There is no such thing as the "right" thread. The task (i.e. the Runnable) needs to be designed so that it doesn't matter which thread runs it. This is not normally an issue ... assuming that your application properly synchronizes access / updates to data that is potentially used by more than one threads.
于 2012-04-30T04:58:50.887 回答