多线程-生产者消费者案例

public class Test {
    public static void main(String[] args) {
        Clerk clerk = new Clerk();
        Thread productor = new Thread(new Productor(clerk));
        Thread consumer = new Thread(new Consumer(clerk));
        productor.start();
        consumer.start();
    }
}

class Clerk {
    private int product = 0;

    public synchronized void addProduct() {
        if (product >= 20) {
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        } else {
            product++;
            System.out.println("生产者生产了第" + product + "个产品");
            notifyAll();
        }
    }

    public synchronized void getProduct() {
        if (this.product <= 0) {
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("消费者取走了第" + product + "个产品");
            product--;
            notifyAll();
        }
    }
}

class Productor implements Runnable {
    Clerk clerk;

    public Productor(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        System.out.println("生产者开始生产产品");
        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            clerk.addProduct();
        }
    }
}

class Consumer implements Runnable {
    Clerk clerk;

    public Consumer(Clerk clerk) {
        this.clerk = clerk;
    }

    @Override
    public void run() {
        System.out.println("消费者开始取走产品");
        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            clerk.getProduct();
        }
    }
}