生产者/消费者那篇文章，最后的多生产/多消费代码实现有点问题吧

[chapter007]

原文是使用reentrantLock和condition来实现多生产，多消费模式，但是再开启多个线程的时候传入的是同一个condition，并不能控制多个线程

public static void main(String[] args) throws InterruptedException {
        ReentrantLock lock = new ReentrantLock();
        Condition newCondition = lock.newCondition();
        Product product = new Product(lock,newCondition);
        Consumer consumer = new Consumer(lock,newCondition);
        for(int i=0;i<3;i++){
            ThreadProduct pThread = new ThreadProduct(product);
            ThreadConsumer cThread = new ThreadConsumer(consumer);
            pThread.start();
            cThread.start();
        }

    }

这样运行的结果也有问题，会有两个线程get不到val
修改为

public static void main(String[] args){
        ReentrantLock lock = new ReentrantLock();
        for (int i=0;i<3;i++){   
            Condition condition = lock.newCondition();
            Producer producer = new Producer(lock,condition);
            Consumer consumer = new Consumer(lock,condition);
            ProducerThread producerThread = new ProducerThread(producer);
            ConsumerThread consumerThread = new ConsumerThread(consumer);
            producerThread.start();
            consumerThread.start();
        }
    }

就是每个线程里有一个condition，一个reentrantlock可以有多个condition。
结果正常