请问这题中的刷新怎么实现？？

Question

Answer 1

public class TimeCounter {     public static void startCount(int begin){             while (begin>0){                 System.out.println("还剩"+begin+"秒");                 try {                     Thread.sleep(1000);                 } catch (InterruptedException e) {                     e.printStackTrace();                 }                 begin = begin -1;             }     }     public static void main(String[] args) {         startCount(10);     } }