문자열을 정수로 변환하기

class Solution {
    public int solution(String n_str) {
        int answer = Integer.valueOf(n_str);
        return answer;
    }
}

Integer.parseInt()

Integer.valueOf()

출처 : https://www.freecodecamp.org/korean/news/java-string-to-int-how-to-convert-a-string-to-an-integer/