Java 多线程通信

/** * 这个案例说是生产者与消费者的故事,柜台卖蛋糕,消费者要等生产者做好蛋糕才 * 能获取到,也就是做一个卖一个。 * Created by lcj on 16/10/11. */

public class ThreadInfoExchange {


    public static void main(String arg[]) {
        Counter c = new Counter();
        Producer p = new Producer(c);

        Customer cus = new Customer(c);

        p.start();
        cus.start();

    }

    static class Counter {
        private int cake = 1;
        private boolean a = false;

        synchronized public int getContent() {
            while (a == false) {
                try {
                    wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            a = false;
            notify();
            return cake;
        }

        synchronized public void setContent(int content) {
            while (a == true) {

                try {
                    wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            this.cake = content;
            a = true;
            notify();
        }
    }

    static class Producer extends Thread {
        Counter c;
        int i;

        public Producer(Counter c) {
            this.c = c;
        }

        @Override
        public void run() {
            super.run();
            while (true) {

                try {
                    sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                c.setContent(i++);
            }

        }
    }

    static class Customer extends Thread {
        Counter c;

        public Customer(Counter c) {
            this.c = c;
        }

        @Override
        public void run() {
            super.run();
            while (true) {
                System.out.println("出售了" + c.getContent() + "蛋糕");

                try {
                    sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            }

        }
    }
}