utils.readlines()

text file을 읽어 array[]로 return해 줌

 

    String[] readLines(String filename) throws IOException {
        FileReader fileReader = new FileReader(filename);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        List<String> lines = new ArrayList<>();
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            line = line.trim();
            lines.add(line);
        }
        bufferedReader.close();

        return lines.toArray(new String[0]);
    }