class ProducerConsumerDemo
{
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;
public synchronized void set(String name)
{
while(flag) //定义while判断标记是因为要让被唤醒的线程再一次判断标记。
try{this.wait();}catch(Exception e){}
this.name = name+"--"+count++;
System.out.println(Thread.currentThread().getName()+"....生产者...."+this.name);
flag = true;
this.notifyAll(); //定义notifyAll,即唤醒本方也唤醒对方。如果只有notify就容易出现只唤醒本方线程的情况，导致程序中的所有线程都等待。
}
public synchronized void out()
{
while(!flag)
try{wait();}catch(Exception e){}
System.out.println(Thread.currentThread().getName()+"....消费者..........."+this.name);
flag = false;
this.notifyAll();
}
}
class Producer implements Runnable
{
private Resource res;