java简单算法题，大神帮忙看下哈

Question

1 用代码实现以下程序：篮子里有18个包子，每60s取出三个包子，同时每40s放入1个包子，不断地重复上动作，当包子不足两个时，程序结束。

Answer 1

import java.util.Timer;
import java.util.TimerTask;

public class BaoZi {

public static void main(String[] args) {
    final Timer timer = new Timer();
    TimerTask task = new TimerTask() {

        int count = 0;

        int baozi = 18;

        @Override
        public void run() {
            count++;
            if (count % 4 == 0) {
                baozi++;
                System.out.println("放入1个包子,现总数：" + baozi);
            }
            if (count % 6 == 0) {
                baozi -= 3;
                System.out.println("取出三个包子,现总数：" + baozi);
            }
            if (baozi < 2) {
                System.out.println("包子总数：" + baozi + " 不足两个,程序结束");
                timer.cancel();
            }
        }
    };
    timer.scheduleAtFixedRate(task, 0, 20000);
}

}