PC.java

package chapter11;

//An incorrect implementation of a producer and consumer
class Q {
    int n;

    synchronized int get() {
        System.out.println("Got : " + n);
        return n;
    }

    synchronized void put(int n) {
        this.n = n;
        System.out.println("Put: " + n);
    }
}

class Producer implements Runnable {

    Q q;
    Thread t;

    public Producer(Q q) {
        this.q = q;
        t = new Thread(this, "Producer");

    }

    public void run() {
        int i = 0;
        while (true) {
            q.put(i++);
        }
    }
}

class Consumer implements Runnable {
    Q q;
    Thread t;

    public Consumer(Q q) {
        this.q = q;
        t = new Thread(this, "Consumer");
    }

    public void run() {
        while (true) {
            q.get();
        }
    }
}


public class PC {
    public static void main(String[] args) {
        Q q = new Q();
        Producer p = new Producer(q);
        Consumer c = new Consumer(q);

        //start the threads..
        p.t.start();
        c.t.start();

        System.out.println("Press Control-C to stop");

    }
}