class Solution {
    public String solution(String my_string, String overwrite_string, int s) {
        String answer = "";
        return answer;
    }
}

해결법

방법 1

class Solution {
    public String solution(String my_string, String overwrite_string, int s) {
        String answer = "";
        
        answer = my_string.substring(0, s) + overwrite_string + my_string.substring(s+overwrite_string.length(), my_string.length());
        
        return answer;
    }
}

문자열 겹쳐쓰기 Lv. 0