生产者与消费者.md

栗子1：使用wait/notify方法来实现

public class ProducerAndConsumerExample {
    public static void main(String[] args) {
        Container container = new Container();
        new Thread(new Consumer(container)).start();
        new Thread(new Producer(container)).start();
    }
}


class Consumer implements Runnable {

    private Container container;

    public Consumer(Container container) {
        this.container = container;
    }

    @Override
    public void run() {
        try {
            for (int i = 0; i < 100; i++) {
                container.take();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

class Producer implements Runnable {

    private Container container;

    public Producer(Container container) {
        this.container = container;
    }

    @Override
    public void run() {
        try {
            for (int i = 0; i < 100; i++) {
                container.put();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

// 实现类似于阻塞队列的容器
class Container {
    private Integer maxSize = 30;
    private LinkedList<Integer> queue;

    public Container() {
        queue = new LinkedList<>();
    }

    public synchronized void put() throws InterruptedException {
        // 队列已满，阻塞等待，使用while而不是使用if
        while (this.queue.size() == maxSize) {
            this.wait();
        }
        this.queue.add(1);
        System.out.println("添加到容器,容器内还有" + this.queue.size() + "个数据");
        // 通知消费者取数据
        this.notifyAll();
    }

    public synchronized void take() throws InterruptedException {
        // 队列为空，阻塞等待，使用while而不是使用if
        while (this.queue.size() == 0) {
            this.wait();
        }
        this.queue.poll();
        System.out.println("取出数据，容器内还有" + this.queue.size() + "个数据");
        // 通知生产者生产数据
        this.notifyAll();
    }
}