java多线程wait()和notify()如何使用

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注：wait()和notify()应当用在synchronized内package com.test;import java.util.ArrayList;public class ThreadWaitTeste {public static void main(String[] args) {ArrayList ar = new ArrayList();Product p = new Product(ar);Consumer c = new Consumer(ar);Thread t1 = new Thread(p);Thread t2 = new Thread(c);t1.start();t2.start();}}class Product implements Runnable{ArrayList  array;public Product(ArrayList array){this.array= array;}public void run() {while (true){     synchronized(array){if(this.array.size()<5){this.array.add("test!");this.array.add("test!");this.array.add("test!");this.array.add("test!");System.out.println("Product size : "+array.size());}else{System.out.println("Product wait size : "+array.size()+"数量少于5,等待......");try {array.wait();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}}}class Consumer implements Runnable{ArrayList  array;public Consumer(ArrayList array){this.array= array;}public void run() {while(true){synchronized(array){if(this.array.size()>=5){this.array.remove(1);System.out.println("Consumer size : "+array.size());}else{try {array.notifyAll();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}}}

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