public class Remove {

        public static String trimPoints(String txt)
        {
            long start = System.currentTimeMillis();
            char[] cs = txt.toCharArray();
            int index =0;
            for(int x =cs.length-1;x>=0;x--)
            {
                if(cs[x]=='.')
                    continue;
                else
                    {
                    index = x+1;
                    break;
                    }
            }
            String response = txt.substring(0,index);
            System.out.println("fun took: "+(System.currentTimeMillis()-start));
            return response ;
        }


        public static void main(String args[])
        {

            System.out.println(trimPoints("abc....."));
            long start = System.currentTimeMillis();
            String fi = "abc.....".replaceAll("\\.+$", "");
            System.out.println("regex took: "+(System.currentTimeMillis()-start));
            System.out.println(fi);
        }
}