class Shop

{

    public static void main(String[] args)

    {

        Things t=new Things();

        Custom c=new Custom(t);

        Producer p=new Producer(t);

        p.start();

        c.start();

    }

}

class Producer extends Thread

{

    private Things t;

    public Producer(Things t)//和customer传入的是同一个Things对象，因此共享区域（同步函数）可以实现同步

    {

        this.t=t;//局部变量的作用域妙用，不必命名地复杂难记

        // TODO Auto-generated constructor stub

    }

    public void run()

    {

        for (int i = 1; i < 10; i++)

        {

            t.putNum(i);

        }

    }

}

class Custom extends Thread

{

    Things t;

    public Custom(Things t)//和customer传入的是同一个Things对象，因此共享区域（同步函数）可以实现同步

    {

        this.t=t;

        // TODO Auto-generated constructor stub

    }

    public void run()

    {

        while(true)

        {

            System.out.println("get "+t.getNum());

        }

    }

}

class Things

{

    private int num=0;

    boolean bFull=false;

    public synchronized void putNum(int i)

    {

        if(!bFull)

        {

            this.num=i;

            this.bFull=true;

            System.out.println(num);

            notify();

        }

        try

        {

            wait();

        } catch (InterruptedException e)

        {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public synchronized int getNum()

    {

        if(!bFull)

        {

            try {

                wait();

            } catch (InterruptedException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

        this.bFull=false;

        notify();

        return num;

    }

}