线程与线程池，实例比较。

线程池：

int count = 200000;    long startTime = System.currentTimeMillis();    final List<Integer> l = new LinkedList<Integer>();    ThreadPoolExecutor tp = new ThreadPoolExecutor(1, 1, 60, TimeUnit.SECONDS, new LinkedBlockingDeque<Runnable>(count));    final Random random = new Random();    for (int i = 0; i < count; i++) {      tp.execute(new Runnable() {                @Override        public void run() {          l.add(random.nextInt());        }      });    }    tp.shutdown();    try {      tp.awaitTermination(1, TimeUnit.DAYS);    } catch (InterruptedException e) {      e.printStackTrace();    }    System.out.println(System.currentTimeMillis() - startTime);    System.out.println(l.size());

输出结果：

1 1722 200000

线程：

int count = 200000;    long startTime = System.currentTimeMillis();    final List<Integer> l = new LinkedList<Integer>();    final Random random = new Random();    for (int i = 0; i < count; i++) {      Thread thread = new Thread(){        @Override        public void run(){          l.add(random.nextInt());        }      };      thread.start();      try {        thread.join();      } catch (InterruptedException e) {        e.printStackTrace();      }    }    System.out.println(System.currentTimeMillis() - startTime);    System.out.println(l.size());

输出结果：