2325. 解密消息
题解
模拟
public String decodeMessage(String key, String message) {
// 存映射
Map<Character, Character> map = new HashMap<>();
int i = 0;
for (char c : key.toCharArray()) {
if (c == ' ') continue;
Character character = map.get(c);
if (Objects.isNull(character)) {
map.put(c, (char) (i + 'a'));
i++;
}
}
StringBuilder sb = new StringBuilder();
// 将加密字符映射成解密字符
for (char c : message.toCharArray()) {
if (c == ' ') sb.append(c);
else sb.append(map.get(c));
}
return sb.toString();
}