Condition實現生產者、消費者

場景：一支槍可盛20發子彈，運用多線程，實現子彈不停上膛、射出的過程。

public class Bullet {

    private int type;
    private String name;


    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class BulletDealer {

    private int size;
    private List<Bullet> queue = new ArrayList<>();
    private Lock lock = new ReentrantLock();

    private Condition notFull = lock.newCondition();
    private Condition notEmpty = lock.newCondition();

    public BulletDealer(int size){

        this.size = size;
    }

    public void produce(Bullet e) {

        try {
            lock.lock();
            // System.out.println("procduce");
            while (queue.size() == size) {

                System.out.println("彈膛滿了");
                try {
                    notFull.await();
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }

            queue.add(e);
            System.out.println("上膛");
            notEmpty.signal();

        } finally {

            // System.out.println("producer unlock");
            lock.unlock();

        }
    }

    public void consume(){

        try {
            lock.lock();

            while (queue.size() == 0) {

                System.out.println("沒子彈了");
                try {
                    notEmpty.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            queue.remove(0);
            System.out.println("射擊");
            notFull.signal();

        }finally {

            //System.out.println("consumer unlock");
            lock.unlock();
        }

    }

    public static void main(String[] args){

        BulletDealer dealer = new BulletDealer(20);


        for(int i=0; i<10; i++){

            new Thread(new Consumer(dealer)).start();
        }

        for(int j=0; j<10; j++){

            Bullet e = new Bullet();
            e.setName("子彈：" + j);
            e.setType(1);
            dealer.produce(e);
            new Thread(new Producer(dealer, e)).start();
        }
    }
}

public class Producer implements Runnable{

    private BulletDealer dealer;
    private Bullet bullet;
    public Producer(BulletDealer dealer, Bullet bullet){

        this.dealer = dealer;
    }


    @Override
    public void run() {

        dealer.produce(bullet);
    }
}

public class Consumer implements Runnable {

    private BulletDealer dealer;

    public Consumer(BulletDealer dealer){

        this.dealer = dealer;
    }

    @Override
    public void run() {

        dealer.consume();
    }
}