Java系列-线程-为什么不能使用Executors创建线程池

1.newFixedThreadPool

    public static ExecutorService newFixedThreadPool(int nThreads) {
        return new ThreadPoolExecutor(nThreads, nThreads,
                                      0L, TimeUnit.MILLISECONDS,
                                      new LinkedBlockingQueue());
    }

缺点：任务列表会无限大

    public LinkedBlockingQueue() {
        this(Integer.MAX_VALUE);
    }

 

2.newSingleThreadExecutor

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

缺点：任务列表会无限大 

3.newCachedThreadPool

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

缺点：线程数会无限大

最大线程数为Integer.MAX_VALUE