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프로그래머스/0/120893. 대문자와 소문자 Expand file tree Collapse file tree Original file line number Diff line number Diff line change 11# [ level 0] 대문자와 소문자 - 120893
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3- [ 문제 링크] ( https://school.programmers.co.kr/learn/courses/30/lessons/120893 )
3+ [ 문제 링크] ( https://school.programmers.co.kr/learn/courses/30/lessons/120893?language=java )
44
55### 성능 요약
66
7- 메모리: 10.1 MB, 시간: 0.15 ms
7+ 메모리: 78.5 MB, 시간: 0.58 ms
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99### 구분
1010
1616
1717### 제출 일자
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19- 2024년 05월 25일 12:17:38
19+ 2026년 06월 23일 08:58:33
2020
2121### 문제 설명
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Original file line number Diff line number Diff line change 1+ class Solution {
2+ public String solution (String my_string ) {
3+ StringBuilder sb = new StringBuilder ();
4+
5+ for (int i = 0 ; i < my_string .length (); i ++) {
6+ char c = my_string .charAt (i );
7+
8+ if (Character .isUpperCase (c )) sb .append (Character .toLowerCase (c ));
9+ else sb .append (Character .toUpperCase (c ));
10+ }
11+ return sb .toString ();
12+ }
13+ }
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