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 1. ͬʱֻÓÐ1¸öÉú²úÕߺÍ1¸öÏû·ÑÕß
 2. ²»ÓöÓÁУ¬Í¬Ê±Ö»ÓÐÒ»¸ö²úÆ·
 3. Éú²úÕßÿ´ÎÉú²ú1¸ö0µ½100Ö®¼äµÄËæ»úÊý£¬Ïû·ÑÕßÔò°Ñ¸ÃËæ»úÊý´òÓ¡³öÀ´¡£Èç¹û²úÉúµÄËæ»úÊýΪ0£¬ÔòÉú²úÕß¡¢Ïû·ÑÕß¾ùÍ˳öÔËÐÐ
import java.util.Random;
public class ProducerConsumer
{
    public static void main(String[] args)
    {
        Product product = new Product();
        Producer producer = new Producer(product);
        Consumer consumer = new Consumer(product);
        producer.start();
        consumer.start();
    }
    private static class Product
    {
        public int value = -1;
    }
    private static class Producer extends Thread
    {
        private Product product = null;
        public Producer(Product product)
        {
            this.product = product;
        }
        public void run()
        {
            Random rand = new Random();
            while (true)
            {
                try
                {
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