내가 작성한 코드
import java.util.*;
class Solution {
public String[] solution(String my_string) {
String[] answer = new String[my_string.length()];
for (int i = 0; i < my_string.length(); i++) {
answer[i] = my_string.substring(0 + i);
}
Arrays.sort(answer);
return answer;
}
}