Producer Consumer Problem

import java.util.LinkedList;
import java.util.Queue;

public class ProCons {

    Queue<Integer> queue        = new LinkedList<Integer>();
    int            max_capacity = 5;

    public void produce(int i) throws InterruptedException {
        while (true) {
            synchronized (this) {
                if (queue.size() == max_capacity) {
                    wait();
                }
                System.out.println("Produced: " + i);
                queue.add(i);
                notify();
                Thread.sleep(1000);
            }
        }
    }

    public void consume() throws InterruptedException {
        while (true) {
            synchronized (this) {
                if (queue.size() == 0) {
                    wait();
                }
                int i = queue.poll();
                System.out.println("consumed: " + i);
                notify();
                Thread.sleep(1000);
            }
        }
    }

    public static void main(String[] args) {
        ProCons pc = new ProCons();

        Thread producerThread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    pc.produce(100);
                } catch (InterruptedException e) {
                    System.out.println("Exception in producer" + e.getMessage());
                }

            }
        });

        Thread consumerThread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    pc.consume();
                } catch (InterruptedException e) {
                    System.out.println("Exception in consumer" + e.getMessage());
                }
            }
        });
        try {
            producerThread.start();
            consumerThread.start();
            producerThread.join();
            consumerThread.join();
        } catch (InterruptedException e) {
            System.out.println("Exception " + e.getMessage());
        }

    }
}