This question may make confusion ,so i am explain it below.
I have already create a counter for counting the time(Like how much time people works).Its working fine with single characters (like 0:0:0), but i want to display it in decimal (like 00:00:00). I had tried the below code, but it works like the before .No changes yet.
  private void timer() {
    int locSec = 0;
    int locMin = 0;
    int locHr = 0;
    DecimalFormat format = new DecimalFormat("00");
    String formatSecond = format.format(locSec);
    String formatMinute = format.format(locMin);
    String formatHour = format.format(locHr);
    sec = Integer.parseInt(formatSecond);
    min = Integer.parseInt(formatMinute);
    hr = Integer.parseInt(formatHour);
    Timer T = new Timer();
    timeCounter = (TextView) findViewById(R.id.tvDisplayCountDown);
    T.scheduleAtFixedRate(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    timeCounter.setText("time= " + hr + ":"+ min + ":"+ sec);
                    sec++;
                    if(sec > 59){
                        sec = 0;
                        min = min + 1;                          
                    }
                }
            });
        }
    }, 1000, 1000);
}
where hr, min and sec are global variables and assigned as 0. 
But the output is same as before: 0:0:0
helps and suggestions are appreciable.
Thank You