Hello World synchronized

TestNotify.java

import java.util.*;

public class TestNotify {
    public static void main(String[] args) {
        Stock stock = new Stock();
        Thread consumer = new Thread(new Consumer(stock));
        Thread producer = new Thread(new Producer(stock));

        consumer.start();
        producer.start();
    }

    static class Producer implements Runnable {
        final Stock stock;

        public Producer(Stock stock) {
            this.stock = stock;
        }

        @Override
        public void run() {
            for (Integer i = 1; i < 10; i++) {
                synchronized (stock) {
                    whail(stock.isSetNew()){
                        try {
                            stock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    stock.set(i.toString());
                    System.out.println(i + ". Producer set: " + i);
                    stock.notify();
                }
            }
        }
    }

    static class Consumer implements Runnable {
        final Stock stock;

        public Consumer(Stock stock) {
            this.stock = stock;
        }

        @Override
        public void run() {
            for (int i = 1; i < 10; i++) {
                synchronized (stock) {
                    whail(!stock.isSetNew()){
                        try {
                            stock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    System.out.println(i + ". Consumer get: " + stock.get());
                    stock.notify();
                }
            }
        }
    }

    static class Stock {
        private Deque<String> boxs = new LinkedList<String>();
        private boolean isSetNew = false;

        void set(String box) {
            isSetNew = true;
            boxs.push(box);
        }

        String get() {
            isSetNew = false;
            return boxs.peek();
        }

        boolean isSetNew() {
            return isSetNew;
        }
    }
}