java线程池模拟并发

public class CountDownLatchTest1 implements Runnable{  
    final AtomicInteger number = new AtomicInteger();  
    volatile boolean bol = false;  
  
    @Override  
    public void run() {  
        System.out.println(number.getAndIncrement());  
        synchronized (this) {  
            try {  
                if (!bol) {  
                    System.out.println(bol);  
                    bol = true;  
                    Thread.sleep(10000);  
                }  
            } catch (InterruptedException e) {  
                e.printStackTrace();  
            }  
            System.out.println("并发数量为" + number.intValue());  
        }  
  
    }  
  
    public static void main(String[] args) {  
        ExecutorService pool = Executors. newCachedThreadPool();  
        CountDownLatchTest1 test = new CountDownLatchTest1();  
        for (int i=0;i<10;i++) {  
            pool.execute(test);  
        }  
    }  
}