<pre>public class Solution {
/**
* @param character: a character
* @return: a character
*/
public char lowercaseToUppercase(char character) {
// write your code here
if (character <= 'z' && character >= 'a') {
character -= ('a' - 'A');
} else if (character <= 'Z' && character >= 'A') {
character += ('a' - 'A');
}
return character;
}
}</pre>
