public static void main(String[] args) throws IOException, NoSuchAlgorithmException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    List<String> nameList = new ArrayList<>();

    System.out.print("인원수를 입력해주세요 : ");
    int size = Integer.parseInt(br.readLine());
    int min = 0;

    for (int i = 0; i < size; i++) {
        System.out.print("이름을 입력해주세요 : ");
        nameList.add(br.readLine());
    }

    int index = SecureRandom.getInstanceStrong().nextInt(size - min) + min;

    System.out.println(nameList.get(index));
}