[Programmers] Lv.0 / 글자 이어 붙여 문자열 만들기 / Java

문제

 

풀이

class Solution {
    public String solution(String my_string, int[] index_list) {
        
        String answer = "";
        
        for(int i = 0; i < index_list.length; i ++) {
            answer += my_string.charAt(index_list[i]);
        }
        return answer;
    }
}

class Solution {
    public String solution(String my_string, int[] index_list) {

        StringBuilder sb = new StringBuilder();

        for (int idx : index_list)
            sb.append(my_string.charAt(idx));

        return sb.toString();
    }
}

 

출처

https://school.programmers.co.kr/learn/courses/30/lessons/181915