PC.java

class PC
{
    public static void main(String args[])
    {
        Q q = new Q();
        Producer p = new Producer(q);
        Consumer c = new Consumer(q);
        System.out.println("Press Control-C to stop.");
    }
}
class Q
{
    int n;
    boolean valueSet = false;
    synchronized int get()
    {
        if(!valueSet)
            try
            {
                    wait();
            }
            catch(Exception e)
            {

            }
            System.out.println("Got: " + n);
            valueSet = false;
            notify();
            return n;
    }
    synchronized void put(int n)
    {
        if(valueSet)
        try
        {
            wait();
        }
        catch(Exception e)
        {

        }
        this.n = n;
        valueSet = true;
        System.out.println("Put: " + n);
        notify();
    }
}

class Producer implements Runnable
{
    Q q;
    Thread t;
    Producer(Q q)
    {
        this.q = q;

        t = new Thread(this, "Producer");
        t.start();
    }
    public void run()
    {
        int i = 0;
        while(true)
        {
            q.put(i++);
        }
    }
}

class Consumer implements Runnable
{
    Q q;
    Consumer(Q q)
    {
        this.q = q;
        new Thread(this, "Consumer").start();
    }
    public void run()
    {
        while(true)
        {
            q.get();
        }
    }
}