使用java写一个国庆倒计时

package d4;

import java.util.Date;

public class q2 {
    public static void main(String[] args) throws InterruptedException {
        while (true){
            Date date1 = new Date(2022-1900, 9, 1, 0, 0, 0);
            long gpTime = date1.getTime();
            Date atPresent = new Date();
            long atTime = atPresent.getTime();
            long djs = gpTime-atTime;
            getDuration(djs);
            Thread.sleep(1000);
        }

    }
    public static String getDuration(long djs){
        int ss = 1000;
        int mi = ss * 60;
        int hh = mi * 60;
        int dd = hh * 24;
        long day = djs / dd;
        long hour = (djs - day * dd) / hh;
        long minute = (djs - day * dd - hour * hh)/ mi;
        long sec = (djs - day * dd -hour * hh - minute * mi) / ss;
        while (true){
            if (day > 0) {
                System.out.println(day + "天" + hour + "小时" + minute + "分钟"+ sec);
                return day + "天" + hour + "小时" + minute + "分钟";
            } else if (hour > 0) {
                System.out.println(hour + "小时" + minute + "分钟"+ sec);
                return hour + "小时" + minute + "分钟";
            } else if (minute > 0) {
                System.out.println( minute + "分钟"+ sec);
                return minute + "分钟";
            } else {
                System.out.println(sec+"秒");
                return 0 + "分钟";
            }
        }

    }

}