JAVA 线程间通信 -生产者消费者JDK5.0升级版

//仅作为学习笔记

/*JDK1.5中提供了多线程升级解决方案将同步Synchronized替换成现实Lock操作将Object中的wait，notify, notifyAll,替换成了Condition对象该对象可以是Lock锁，进行获取*/import java.util.concurrent.locks.*;class Res{private int count=0;private String name;privateboolean flag = false;private Lock lock = new ReentrantLock();//申请锁private Condition condition_pro = lock.newCondition();//控制生产者的 唤醒和等待private Condition condition_con = lock.newCondition();//控制消费者的 唤醒和等待public void set(String name)throws InterruptedException{lock.lock();//上锁try{while(flag)condition_pro.await();//生产者等待this.name = name+ " "+ (++count);System.out.println(Thread.currentThread().getName() + "--生产者--" + this.name);flag = true;condition_con.signal();//消费者唤醒}finally{lock.unlock();//解锁}}public void out()throws InterruptedException{lock.lock();try{while(!flag)condition_con.await();System.out.println(Thread.currentThread().getName() + "--消费者----" + this.name);flag = false;condition_pro.signal();}finally{lock.unlock();}}}class Producer implements Runnable {Res r = new Res();Producer(Res r){this.r = r;}public void run(){while(true)try{r.set("商品");}catch(InterruptedException e) {}}}class Consumer implements Runnable{Res r = new Res();Consumer(Res r){this.r = r;}public void run(){while(true)try{r.out();}catch(InterruptedException e) {}}}class TestDemo{public static void main(String []args){Res r = new Res();Producer p = new Producer(r);Consumer c = new Consumer(r);Thread t1 = new Thread(p);Thread t2 = new Thread(c);Thread t3 = new Thread(p);Thread t4 = new Thread(c);t1.start();t2.start();t3.start();t4.start();}}