Java生产者消费者模式实例分析

/**
 * 我是生产者，负责生产
 */
public class Product implements Runnable {
 private Queue q;
 public Product(Queue q) {
 this.q = q;
 }
 @Override
 public void run() {
 try {
  for (int i = 0; i < 3; i++) {
  q.product("test" + i);
  }
 } catch (InterruptedException e) {
  e.printStackTrace();
 }
 }
}

/**
 *我是消费者，负责消费
 */
public class Consumer implements Runnable {
 private Queue q;
 public Consumer(Queue q){
 this.q = q;
 }
 @Override
 public void run() {
 try {
  for(int i=0 ; i < 3 ; i++){
  q.consumer();
  }
 } catch (InterruptedException e) {
  e.printStackTrace();
 }
 }
}

/**
 *
 *我是缓存，负责产品的存(生产后的放置)取(消费时的获取)
 */
public class Queue {
 private final Object lock = new Object();
 private List list = new ArrayList();
 public void product(String param) throws InterruptedException {
 synchronized (lock) {
  System.out.println("product生产");
  list.add(param);
  lock.notify();
  lock.wait();
 }
 }
 public void consumer() throws InterruptedException {
 synchronized (lock) {
  lock.wait();
  System.out.println("product消费");
  if (list.size() > 0) {
  list.remove(list.size() - 1);
  }
  lock.notify();
 }
 }
}
public class TestMain {
 public static void main(String[] args) {
 Queue q = new Queue();
 Product p = new Product(q);
 Consumer s = new Consumer(q);
 Thread t1 = new Thread(p);
 Thread t2 = new Thread(s);
 t1.start();
 t2.start();
 }
}