黑马程序员，JDK1.5中提供了多线程升级解决方案Lock操作

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JDK1.5中提供了多线程升级解决方案。
将同步synchronized替换成显示的Lock操作。
将Object中的wait,notify,notifyAll,替换成了Condition对象。
该对象可以Lock 进行获取。
该实例中，实现了本方只唤醒对方操作。
*/
class Resource
{
private String name;
private int count = 1;
private boolean flag = false;
private Lock lock = new ReentrantLock();
private Condition condition_pro = new lock.newCondition();
private Condition condition_con = new lock.newCondition();

synchronized
public void set(String name)
{
lock.lock();
try
{
while (flag)
{
try{condition_pro.await();}catch(Exception e){}
}
this.name = name+"..."+count++;
System.out.println(Thread.currentThread().getName()+"成产："+this.name);
flag =true;
condition_con.signal();

}
finally
{
lock.unlock();
}

}
public void out()
{
lock.lock();
try
{
while (!flag)
{
try{condition_con.await();}catch(Exception e){}
}
System.out.println(Thread.currentThread().getName()+"消费：..."+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)
{
res.set("商品");
}
}
}

class Consumer implements Runnable
{
private Resource res;
Consumer(Resource res)
{
this.res = res;
}
public void run()
{
while (true)
{
res.out();
}

}

}

class ProducerConsumerDemo
{
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();

}

}

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