Object类wait及notify方法原理实例解析

import java.util.ArrayList;

public class Test_14 {
  public static void main(String[] args) {
    ArrayList list = new ArrayList();
    Thread t1 = new Thread(new ProducerThread(list));
    t1.setName("producer");
    Thread t2 = new Thread(new ConsumerThread(list));
    t2.setName("consumer");
    t1.start();
    t2.start();
  }
}
//生产者线程
class ProducerThread implements Runnable{
  private ArrayList arrayList;

  public ProducerThread(ArrayList arrayList) {
    this.arrayList = arrayList;
  }

  @Override
  public void run() {
    while (true) {
      synchronized (arrayList) {
        if (arrayList.size() > 9){
          try {
            arrayList.wait();
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
        }
        try {
          Thread.sleep(1000);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        arrayList.add(new Object());
        System.out.println(Thread.currentThread().getName() + "---> 生产" + "---库存" + arrayList.size());
        arrayList.notify();
      }
    }
  }
}

//消费者线程
class ConsumerThread implements Runnable{
  private ArrayList arrayList;

  public ConsumerThread(ArrayList arrayList) {
    this.arrayList = arrayList;
  }

  @Override
  public void run() {
    while (true){
      synchronized (arrayList){
        if (arrayList.size() < 9){
          try {
            arrayList.wait();
          } catch (InterruptedException e) {
            e.printStackTrace();
          }
        }
        try {
          Thread.sleep(1000);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        arrayList.remove(0);
        System.out.println(Thread.currentThread().getName() + "---> 消费" + "---库存" + arrayList.size());
        arrayList.notify();
      }
    }
  }
}