盘点java线程池中的设计模式

public static ExecutorService newSingleThreadExecutor(ThreadFactory threadFactory) {
    return new FinalizableDelegatedExecutorService (new 
    ThreadPoolExecutor(1, 1,0L, TimeUnit.MILLISECONDS, new 
   LinkedBlockingQueue<Runnable>(), threadFactory));
 }

 static class DelegatedExecutorService extends AbstractExecutorService {
        private final ExecutorService e;
//间接调用该实现 为了屏蔽setXXX方法
        DelegatedExecutorService(ExecutorService executor) { e = executor; }
//...
        public void execute(Runnable command) { e.execute(command); }
        }