import java.util.concurrent.locks.*;
public  class Producer7
{
public static void main(String[] args)
{
  Resource r = new Resource();
  Producer pro = new Producer(r);
  Consumer con = new Consumer(r);
  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 = false;
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();//t1,t2
   this.name = name+"--"+count++;
   System.out.println(Thread.currentThread().getName()+"...生产者.."+this.name);
   flag = true;
   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 = false;
   condition_pro.signal();
   
  }
  finally
  {
   lock.unlock();
  }
  
}
}
class Producer implements Runnable
{
private Resource res;
Producer(Resource res)
{
  this.res = res;
}
public void run()
{
  while(true)
  {
   
   synchronized(res)
   {
    while(res.count ==1000)
    {
    break;
    }
    try
    {
     res.set("+商品+");
    }
    catch (InterruptedException e)
    {
    }
   }
  }
}
}
class Consumer implements Runnable
{
private Resource res;
Consumer(Resource res)
{
  this.res = res;
}
public void run()
{
  while(true)
  {
   
   synchronized(res)
   {
    while(res.count ==1000)
    {
    break;
    }
    try
    {
     res.out();
    }
    catch (InterruptedException e)
    {
    }
   }
  }
}
}
我就是有个想法加了双层锁，多加了synchronized，但是我不知道怎么都解开这两把锁，让程序能够运行，谁能帮我解答？

这运行不起来吧，你两把锁都指向了同一个对象，这不单单是死锁了，你想下一把钥匙开一个锁，但是这个锁里还有个锁，你的钥匙（当前有执行权的线程）能打开吗

我只是突发奇想而已，可能真的没有解决办法吧

那样会有死锁问题出现的，小几率出现线程之间和谐的状态，开发当中应尽量减少死锁的存在。