生产者消费者demo

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

public class Demo{

    private static final int QUEUE_SIZE = 5;

    public static void main(String[] args) {
        Queue<Integer> queue = new LinkedList<Integer>();
        Producer p1 = new Producer(queue, "生产者--1");
        Producer p2 = new Producer(queue, "生产者--2");

        Consumer c1 = new Consumer(queue, "消费者··1");
        Consumer c2 = new Consumer(queue, "消费者··2");
        Consumer c3 = new Consumer(queue, "消费者··3");

        p1.start();
        p2.start();
        c1.start();
        c2.start();
        c3.start();

    }

    /**
     * 生产者
     */
    public static class Producer extends Thread {
        private final Queue<Integer> queue;
        private String name;
        private int i = 0;

        Producer(Queue<Integer> queue, String name) {
            this.queue = queue;
            this.name = name;
        }

        @Override
        public void run() {
            while (true) {
                synchronized (queue) {
                    while (queue.size() == QUEUE_SIZE) {
                        try {
                            System.out.println("Queue is full, Producer[" + name + "] thread waiting for " + "consumer to take something from queue.");
                            queue.wait();
                        } catch (Exception ex) {
                            ex.printStackTrace();
                        }
                    }
                    System.out.println("[" + name + "] Producing value : " + i);
                    queue.offer(i++);
                    queue.notifyAll();

                    try {
                        Thread.sleep(new Random().nextInt(1000));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

            }
        }
    }

    /**
     * 消费者
     */
    public static class Consumer extends Thread {

        private final Queue<Integer> queue;
        private String name;

        Consumer(Queue<Integer> queue, String name) {
            this.queue = queue;
            this.name = name;
        }

        @Override
        public void run() {
            while (true) {
                synchronized (queue) {
                    while (queue.isEmpty()) {
                        try {
                            System.out.println("Queue is empty, Consumer[" + name + "] thread is waiting for Producer");
                            queue.wait();
                        } catch (Exception ex) {
                            ex.printStackTrace();
                        }
                    }
                    int x = queue.poll();
                    System.out.println("[" + name + "] Consuming value : " + x);
                    queue.notifyAll();

                    try {
                        Thread.sleep(new Random().nextInt(1000));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

            }

        }
    }


}