java 实现在程序中实现生产者与消费者过程。

public class ProducerConsumer {
public static void main (String args[])
{
BufferLock buffer = new BufferLock();
(new Producer(buffer)).start();
(new Consumer(buffer)).start();
}

}

class BufferLock //加互斥锁的缓冲区
{
private char value; //共享变量
private boolean isEmpty=true; //value是否为空的信号量

public synchronized void put(char c) //同步方法
{
while (!isEmpty) //当value不空时，等待
try
{
this.wait(); //使调用该方法的当前线程等待，即阻塞自己
}
catch(InterruptedException e) {}

value = c; //当value空时，value获得值
isEmpty = false; //设置value为不空状态
notify(); //唤醒其他等待线程
}

public synchronized char get() //同步方法
{
while (isEmpty) //当value空时，等待
try
{
this.wait();
}
catch(InterruptedException e) {}

isEmpty = true; //设置value为空状态，并返回值
notify();
return value;
}
}

class Producer extends Thread
{
private BufferLock buffer;
char[] c ={'a','b','c','d','e','f'};

public Producer(BufferLock buffer)
{
this.buffer = buffer;
}

public void run( )
{
for (int i=0; i<c.length; i++)
{
buffer.put(c[i]);
System.out.println("生产者的数据是 : "+c[i]);
}
}
}

class Consumer extends Thread
{
private BufferLock buffer;

public Consumer(BufferLock buffer)
{
this.buffer = buffer ;
}

public void run()
{
for (int i=0; i<6; i++)
System.out.println("消费者的数据是 : "+buffer.get());
}


}