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

public static ExecutorService newCachedThreadPool() {
    return new ThreadPoolExecutor(0, Integer.MAX_VALUE,
                                    60L, TimeUnit.SECONDS,
                                    new SynchronousQueue<Runnable>());
}

ThreadFactory nameThreadFactory = new ThreadFactoryBuilder().setNameFormat(“demo-pool-%d”).build();

/**
 * 各參數(shù)含義
 * corePoolSize    : 線程池中常駐的線程數(shù)量。核心線程數(shù)，默認情況下核心線程會一直存活，即使處于閑置狀態(tài)也不會 
 *                   受存活時間 keepAliveTime 的限制，除非將 allowCoreThreadTimeOut 設置為 true。
 * maximumPoolSize : 線程池所能容納的最大線程數(shù)。超過這個數(shù)的線程將被阻塞。當任務隊列為沒有設置大小的
 *                         LinkedBlockingQueue時，這個值無效。
 * keepAliveTime   : 當線程數(shù)量多于 corePoolSize 時，空閑線程的存活時長，超過這個時間就會被回收
 * unit            : keepAliveTime 的時間單位
 * workQueue       : 存放待處理任務的隊列
 * threadFactory   : 線程工廠
 * handler         : 拒絕策略，拒絕無法接收添加的任務
 */

ExecutorService pool1 = new ThreadPoolExecutor(
5, 200, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(1024));

ExecutorService pool2 = new ThreadPoolExecutor(
5, 200 ,0L, TimeUnit.MILLISECONDS, 
new LinkedBlockingQueue<Runnable>(1024), namedThreadFactory, 
new ThreadPoolExecutor.AbortPolicy());