Count up timer android

I want to use count up timer in android for long hours...

Currently, I am using this code, but after some hours, say after 10 hours, the format goes like 10 : 650 :56 (hh:mm:ss)... for lesser time, it works perfectly...

 private Runnable updateTimerMethod = new Runnable() {

    public void run() {
        timeInMillies = SystemClock.uptimeMillis() - startTime;

        finalTime = timeSwap + timeInMillies;

        int seconds = (int) (finalTime / 1000);
        int minutes = seconds / 60;
        int hours = minutes / 60;
        seconds = seconds % 60;
        int milliseconds = (int) (finalTime % 1000);

        String timer = ("" + String.format("%02d", hours) + " :  "
                + String.format("%02d", minutes) + " : "
                + String.format("%02d", seconds));

        myHandler.postDelayed(this, 0);

        sendLocalBroadcast(timer);

    }

};