class CommonUtils {

    public static String formatTime(int seconds) {
        if (seconds < 0) {
            return "not set";
        }
        int hours = seconds / 3600;
        int remainder = seconds % 3600;
        int minutes = remainder / 60;
        seconds = remainder % 60;
        return String.format("%02d:%02d:%02d", hours, minutes, seconds);
    }

    private  CommonUtils();

}