Time range (08:00 - 18:00)

public class Run{
    public static void main(String[] args) {
        try {
            java.text.SimpleDateFormat formater = new java.text.SimpleDateFormat("HH mm ss");
            java.util.Date n = new java.util.Date();
            String start = "08 00 00";
            String end = "18 00 00";
            String now = formater.format(n);
            java.util.Date time1 = formater.parse(start);
            java.util.Date time2 = formater.parse(end);
            java.util.Date time3 = formater.parse(now);
            long l1 = time1.getTime();
            long l2 = time2.getTime();
            long l3 = time3.getTime();
            double difference = (l3 - l1) / 1000;
            difference = (difference < 0 ? -difference : difference) / 60;
            difference = difference / 60;
            int a = (int) difference;
            double d = (l2 - l3) / 1000;
            d = (d < 0 ? -d : d) / 60;
            d = d / 60;
            int b = (int) d;
            System.out.println("a : " + a);
            System.out.println("b  : " + b);
            if ((0 <= a && a < 10) && (0 <= b && b < 10)) {
                System.out.println("OK");
            }
        } catch (java.text.ParseException e) {
            e.printStackTrace();
        }
    }
}