private  class ShowTiming extends TimerTask {

    public final void run() {
        sec--;
        updateFromTimer(sec);
    }

    protected void updateFromTimer( int remainingTimeSeconds ) {
        if (remainingTimeSeconds > 0) {
            questionForm.setTitle( category + " Questions " + formatTime ( remainingTimeSeconds ) );
        } else {
            showMark();
        }
    }

    String formatTime( int timeInSeconds ) {
        int hr = timeInSeconds/3600;
        int min = (timeInSeconds - (hr*3600))/60;
        int sec = timeInSeconds - ((hr*3600)+ ( min*60));
        String hrs="",mins="",secs="";

        if ( hr < 10 )
            hrs = "" + Integer.toString ( hr );
        else
            hrs = Integer.toString ( hr );

        if ( min < 10 )
            mins = "0" + Integer.toString ( min );
        else
            mins = Integer.toString ( min );

        if ( sec < 10 )
            secs = "0" + Integer.toString ( sec );
        else
            secs = Integer.toString ( sec );

        return ""+ hrs +":" +mins+ ":" + secs;
    }
}