Java管程法，信號燈法生產者消費者

管程法

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

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

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            container.push(new Product(i));
            System.out.println("生產者生產第"+i+"個產品");
        }
    }

}
class Consumer extends Thread{
    Container container;

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

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            Product pop = container.pop();
            Integer id = pop.id;
            System.out.println("消費者消費第"+id+"個產品");
        }
    }
}
class Container{
    /**
     * 容器
     */
   Product[] products = new Product[10];
    /**
     *計數器
     */
   int count = 0;
   public synchronized void push(Product product){
       //容器滿了該方法等待
       if (count==products.length){
           try {
               this.wait();
           } catch (InterruptedException e) {
               e.printStackTrace();
           }
       }
       products[count] = product;
       count++;
       //有貨通知消費者消費
       this.notifyAll();
   }
   public synchronized Product pop(){
       //沒有貨消費者等待
       if (count == 0){
           try {
               this.wait();
           } catch (InterruptedException e) {
               e.printStackTrace();
           }
       }
       count--;
       Product pro = products[count];
       this.notifyAll();
       return pro;
   }
}
class Product{
    Integer id;

    public Product(Integer id) {
        this.id = id;
    }
}

信號燈

public class TestPC {
    public static void main(String[] args) {
        Shop shop = new Shop();
        ExecutorService executorService=new ThreadPoolExecutor(2,5,
                1L, TimeUnit.SECONDS,
                new LinkedBlockingQueue<>(3),
                Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy());
        executorService.execute(new MeiZu(shop));
        executorService.execute(new Shopper(shop));
        executorService.shutdown();
    }
}
class MeiZu extends Thread{
    Shop shop;

    public MeiZu(Shop shop) {
        this.shop = shop;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i%2==0){
                shop.produce(new Phone("魅族17Pro天青色"));
            }else{
                shop.produce(new Phone("魅族17Pro純白色"));
            }
        }
    }
}
class Shopper extends Thread{
    Shop shop;

    public Shopper(Shop shop) {
        this.shop = shop;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            shop.consumer();
        }
    }
}
class Phone{
    String name;

    public Phone(String name) {
        this.name = name;
    }
}
class Shop{
    /**
     *   廠商生產，消費者等待 true
     *   消費者消費，廠商等待flase
     */
    Phone phone;
    boolean flag = true;
    public synchronized void produce(Phone phone){
        if (!flag){
           try {
               this.wait();
            } catch (InterruptedException e) {
               e.printStackTrace();
            }
        }
        System.out.println("廠商生產了"+phone.name);
        this.phone = phone;
        this.flag = !this.flag;
        //通知消費者消費
        this.notifyAll();
    }
    public synchronized void consumer(){
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("消費者購買了"+phone.name);
        this.flag = !this.flag;
        //通知生產者生產
        this.notifyAll();
    }
}