Android: read from text file and convert to string, added "dot" in first line

Question

I use below code for read txt file and convert to string

After convert, added dot to first line and i cant convert number string to integer

Code :

StringBuilder buf = new StringBuilder();
        BufferedReader in = null;
        try {
            InputStream is = context.getAssets().open("db.txt");
            in = new BufferedReader(new InputStreamReader(is));
            String str;

            while ((str = in.readLine()) != null) {
                buf.append(str);
            }

            in.close();
            Log.i("error", "" + buf.toString().trim());
        }
        catch (IOException e) {
            e.printStackTrace();
        }

Errorlog :