public class Test {

    public static void main(String[] args) {
        Baozi baozi = new Baozi();
        new Thread(new Producer(baozi)).start();
        new Thread(new Consumer(baozi)).start();
    }

}

class Baozi{
    private int count;
    private boolean bFull = false;
    
    public synchronized void putBaozi(int i){
        if(!bFull){
            this.count = i;
            bFull = true;
            notify();
        }
        try {
            wait();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    
    public synchronized int getBaozi(){
        if(!bFull){
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        
        bFull = false;
        notify();
        return count;
    }
}

class Producer implements Runnable{
    private Baozi bz;
    
    public Producer(Baozi bz) {
        this.bz = bz;
    }
    @Override
    public void run() {
        for (int i = 1; i <= 10; i++) {
            bz.putBaozi(i);
            System.out.println("老板蒸了第"+i+"个包子");
        }
    }
    
}

class Consumer implements Runnable{
    private Baozi bz;
    
    public Consumer(Baozi bz) {
        this.bz = bz;
    }
    @Override
    public void run() {
        while(true){
            System.out.println("学生妹买了第"+ bz.getBaozi() + "个包子");
        }
    }
    
}