java 用阻塞队列实现生产者消费者

package com.lb;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

public class ProductConsumer {
	private BlockingQueue<String> queue = null;
	private boolean flag = true;

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new ProductConsumer().test();

	}

	public void test() {
		Product product = new Product(queue);
		Consumer consumer = new Consumer(queue);
		Thread p = new Thread(product);
		Thread c = new Thread(consumer);
		p.start();
		c.start();
	}

	public ProductConsumer() {
		queue = new ArrayBlockingQueue<>(1);
	}

	class Product implements Runnable {
		private BlockingQueue<String> queue = null;

		public Product(BlockingQueue<String> queue) {
			// TODO Auto-generated constructor stub
			this.queue = queue;
		}

		@Override
		public void run() {
			// TODO Auto-generated method stub
			while (flag) {
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				String n = String.valueOf((int) (Math.random() * 10));
				try {
					queue.put(n);
					System.out.println("生产了     " + n);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}

	}

	class Consumer implements Runnable {
		private BlockingQueue<String> queue = null;

		public Consumer(BlockingQueue<String> queue) {
			// TODO Auto-generated constructor stub
			this.queue = queue;
		}

		@Override
		public void run() {
			// TODO Auto-generated method stub
			while (flag) {
				try {
					Thread.sleep(4000);
					System.out.println("消费了 " + queue.take());
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}

	}
}