生产者和消费者谁知道问题出在哪里？ - 黑马程序员技术交流社区

import java.util.concurrent.locks.*;
class Demo{
public static void main(String[] args){
Resource res = new Resource();
Producer pro = new Producer(res);
Consumer con = new Consumer(res);
Thread t1 = new Thread(pro);
Thread t2 = new Thread(pro);
Thread t3 = new Thread(con);
Thread t4 = new Thread(con);
t1.start();
t2.start();
t3.start();
t4.start();
}
}
class Resource{
private String name;
private int count = 1;
private boolean flag = true;
private Lock lock = new ReentrantLock();
private Condition condition_pro = lock.newCondition();
private Condition condition_con = lock.newCondition();
public void set(String name)throws InterruptedException{
lock.lock();
try{
while(flag)
condition_pro.await();
this.name = name+"--"+count++;
System.out.println(Thread.currentThread().getName()+"..生产者.."+this.name);
flag = false;
condition_con.signal();
}finally{
lock.unlock();
}
}
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 = true;
condition_pro.signal();
}finally{
lock.unlock();
}
}
}
class Producer implements Runnable{
private Resource res;
Producer(Resource res){
this.res = res;
}
public void run(){
while(true){
try{
Thread.sleep(1000);
res.set("+商品+");
}catch(InterruptedException e){
e.printStackTrace();
}
}
}
}
class Consumer implements Runnable{
private Resource res;
Consumer(Resource res){
this.res = res;
}
public void run(){
while(true){
try{
Thread.sleep(1000);
res.out();
}catch(InterruptedException e){
e.printStackTrace();
}
}
}
}

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