如何从线程池获取线程ID？

Question

我有一个固定的线程池，我可以将任务提交给该线程池（限制为 5个 线程）。如何找出这 5个 线程中的哪一个执行我的任务（例如“第3 个
线程中的第3 个 线程正在执行此任务”）？

ExecutorService taskExecutor = Executors.newFixedThreadPool(5);

//in infinite loop:
taskExecutor.execute(new MyTask());
....

private class MyTask implements Runnable {
    public void run() {
        logger.debug("Thread # XXX is doing this task");//how to get thread id?
    }
}

Answer 1

使用Thread.currentThread()：

private class MyTask implements Runnable {
    public void run() {
        long threadId = Thread.currentThread().getId();
        logger.debug("Thread # " + threadId + " is doing this task");
    }
}