java - 如何动态创建线程？

Question

我想在程序中创建一定数量的线程，其中要创建的线程数量由用户在运行时提供。有什么建议吗？？

Answer 1

有多种方法可以做到这一点。 for 循环是最简单的:

Thread[] threads = new Thread[numThreadsToCreate];
for (int i = 0; i < threads.length; i++) {
    threads[i] = new Thread(yourRunnable);
    threads[i].start();
}

您的Runnable可能是这样的:

private class MyRunnable implements Runnable {
    public void run() {
        // your code to run in the thread goes here
    }
}

您还可以使用线程池:

ExecutorService threadPool = Executors.newCachedThreadPool();
for (int i = 0; i < NUM_THREADS; i++) {
    threadPool.submit(yourRunnable);
}
// shutdown the pool once we submit the last job, they will continue to run
threadPool.shutdown();