求教，线程池运行的问题

Question

我最近也在研究这个   goldenhua(深深地爱上了你) 说的应该是对的 线程是一直在run的
清单 1. 具有线程池的工作队列 
public class WorkQueue
{
    private final int nThreads;
    private final PoolWorker[] threads;
    private final LinkedList queue;    public WorkQueue(int nThreads)
    {
        this.nThreads = nThreads;
        queue = new LinkedList();
        threads = new PoolWorker[nThreads];        for (int i=0; i<nThreads; i++) {
            threads[i] = new PoolWorker();
            threads[i].start();
        }
    }    public void execute(Runnable r) {
        synchronized(queue) {
            queue.addLast(r);
            queue.notify();
        }
    }    private class PoolWorker extends Thread {
        public void run() {
            Runnable r;            while (true) {
                synchronized(queue) {
                    while (queue.isEmpty()) {
                        try
                        {
                            queue.wait();
                        }
                        catch (InterruptedException ignored)
                        {
                        }
                    }                    r = (Runnable) queue.removeFirst();
                }                // If we don't catch RuntimeException, 
                // the pool could leak threads
                try {
                    r.run();
                }
                catch (RuntimeException e) {
                    // You might want to log something here
                }
            }
        }
    }
}