Read text file by Java

File file = new File(sdcard,"Android/file.txt");


        StringBuilder text = new StringBuilder();

        try {
            BufferedReader br = new BufferedReader(new FileReader(file));
            String line;

            while ((line = br.readLine()) != null) {
                text.append(line);
                text.append('\n');
            }
            br.close();
            return text.toString();
        }
        catch (IOException e) {
            return e.getMessage();
        }