经典笔试题：基于阻塞队列实现的简单生产者消费者模式

基于阻塞队列实现的简单生产者消费者模式，代码如下：

public class BlockingQueue_Test {
    private static final int MAX_CAPACITY = 10;
    private static ArrayBlockingQueue<Object> goods = new ArrayBlockingQueue<Object>(MAX_CAPACITY);

    public static void main(String[] args) {
        (new ProducerThread()).start();
        (new ConsumerThread()).start();
    }

    static class ProducerThread extends Thread {
        public void run() {
            while (true) {
                // 每隔 1000 毫秒生产一个商品
                try {
                    Thread.sleep(1000);

                    goods.put(new Object());
                    System.out.println("Produce goods, total: " + goods.size());
                } catch (InterruptedException e) {
                }
            }
        }
    }

    static class ConsumerThread extends Thread {
        public void run() {
            while (true) {
                // 每隔 5000 毫秒消费一个商品
                try {
                    Thread.sleep(5000);

                    goods.take();
                    System.out.println("Consume goods, total: " + goods.size());
                } catch (InterruptedException e) {
                }
            }
        }
    }
}

运行结果如下：

Produce goods, total: 1
Produce goods, total: 2
Produce goods, total: 3
Produce goods, total: 4
Consume goods, total: 3
Produce goods, total: 4
Produce goods, total: 5
Produce goods, total: 6
Produce goods, total: 7
Produce goods, total: 8
Consume goods, total: 7
Produce goods, total: 8
Produce goods, total: 9
Produce goods, total: 10
Consume goods, total: 9
Produce goods, total: 10
Consume goods, total: 9
Produce goods, total: 10