字母大小写转换并倒序输出

public char[] swith(String s) {
int length = s.length();
char[] result = new char[length];
for (int i = 0; i < length; i++) {
char charAt = s.charAt(i);
if (Character.isLowerCase(charAt)) {
char upperCase = Character.toUpperCase(charAt);
result[length - i - 1] = upperCase;
} else {
char lowerCase = Character.toLowerCase(charAt);
result[length - i - 1] = lowerCase;
}
}

return result;

}