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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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