本题程序中实现了一个“生产者一消费者问题”。生产者产生一个随机数存入DataPool类中，消费者从中取出数据。DataPool类一次只能存放一个数据。请更正题中带下划线的部分。

注意：不改变程序的结构，不得增行或删行。

class DataPool

{

private int data;

private boolean isFull;

public DataPool()

{

isFull=false;

}

public synchronized void putData(int d)

{

if(isFull= =true)

{

try

{

this.notify();

}

catch(InterruptedException e)

{}

}

data=d;

isFull=true;

System.out.println("生产了一个数据:"+data);

this.notify();

}

public synchronized int getData()

{

if(isFull= =false)

{

try

{

this.wait();

}

catch(InterruptedException e)

{}

}

isFull=false;

System.out.println("消费了一个数据"+data);

this.wait();

return this.data;

}

boolean getIsFull()

{

return isFull;

}

}

class Producer extends Thread

{

DataPool pool;

public Producer(DataPool pool)

{

this.pool=pool;

}

public void run()

{

for(int i=0; i＜10; i++)

{

int data=(int) (Math.random()*1000);

try

{//用于生产数据

sleep(data);

}

catch(InterruptedException e)

{}

pool.putData(data);

}

}

}

class Consumer implements Runnable

{

DataPool pool;

public Consumer(DataPool pool)

{

this.pool=pool;

}

public void run()

{

for(int i=0; i＜10; i++)

{

int data=pool.getData();

try

{//用于处理数据

sleep((int) (Math.random()*1000));

}

catch(InterruptedException e)

{}

}

}

}

public class advance

}

public static void main(String[] args)

{

Data Pool pool=new Data Pool();

Producer pro=new Producer(pool);

Runnable con=new Consumer(pool);

Thread conTh=new Thread(con);

&n