多线程经典——生产者消费者问题（未加锁版）

/*
* 生产者，消费者
*
* */

class Resrouce
{
private String name;
private int count=1;
private boolean flag=false;
public synchronized void set(String name)
{  while(flag)
try{this.wait();}
catch(InterruptedException e)
{}
this.name=name+count;
count++;
System.out.println(Thread.currentThread().getName()+"..生产者."+this.name);
flag=true;
notifyAll();
}
public synchronized void out()
{    while(!flag)
try{this.wait();}
catch(InterruptedException e)
{}
System.out.println(Thread.currentThread().getName()+"..消费者............."+this.name);
flag=false;
notifyAll();
}
}
class Producer implements Runnable
{
private Resrouce r;
Producer(Resrouce r)
{
this.r=r;
}
public void run()
{
while(true)
{
r.set("烤鸭");
}
}
}
class Consumer implements Runnable
{
private Resrouce r;
Consumer(Resrouce r)
{
this.r=r;
}
public void run()
{
while(true)
{
r.out();
}
}
}

public class Demo
{

public static void main(String[] args)
{
Resrouce r=new Resrouce();
Producer pro=new Producer(r);
Consumer con=new Consumer(r);
Thread t1=new Thread(pro);
Thread t2=new Thread(con);
Thread t3=new Thread(pro);
Thread t4=new Thread(con);
t1.start();
t2.start();
t3.start();
t4.start();
}

}