Java count down

public static void main(String[] args){
SimpleDateFormat da = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
Calendar calendar = Calendar.getInstance();
Date date = calendar.getTime();
String aimTime ="2010-02-03 17:30:00.000";
int count = 0;
Date aimDate = da.parse(aimTime,new ParsePosition(0));
long subTime = aimDate.getTime() - System.currentTimeMillis();
while (true) {
double subTimeD = new
Long(subTime).doubleValue();
double lastDay = subTimeD/(24.0*3600.0*1000.0);
// System.out.println("剩余："+lastDay+"天");
double lastHour = subTimeD/(3600.0*1000.0)-Math.floor(lastDay)*24.0;
// System.out.println("剩余："+lastHour+"小时");
double lastMinute = subTimeD/(60.0*1000.0)-Math.floor(lastDay)*24.0*60.0-Math.floor(lastHour)*60.0;
// System.out.println("剩余："+lastMinute+"分钟");
double lastSecond = subTimeD/(1000.0)-Math.floor(lastDay)*24.0*60.0*60.0-Math.floor(lastHour)*60.0*60.0-Math.floor(lastMinute)*60.0;
// System.out.println("剩余："+lastSecond+"秒");
count++;
System.out.println(count+" last "+
Math.floor(lastDay) + " DAY " +
Math.floor(lastHour) + " HOUR " +
Math.floor(lastMinute) + " MINUTES " + new DecimalFormat("0.0").format(lastSecond) + " SECONDS");
subTime = subTime-100;

try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}