Java倒计时

static int countDownTime=100;//用来设置总时间

Timer timer=new Timer();
        TimerTask task=new TimerTask() {
            @Override
            public void run() {
                if(countDownTime!=0){
                    countDownTime--;
                }
            }
        };
        timer.schedule(task,0,1000);//放在主函数





long currentTime = System.currentTimeMillis();
//计时180秒
int settime = 180;
if ((currentTime - startTime) / 1000 > settime) {
    System.out.println("Time's up!");
    wrongCount=30-correctCount;
    break ;
} else System.out.println(settime - (currentTime - startTime) / 1000 + "s left");