package com.string;
public class Upper {
/**
* Converts all of the characters in this {@code String} to upper case
*
* @param s the string to convert
* @return the {@code String}, converted to uppercase.
*/
public static String toUpperCase(String s) {
char[] values = s.toCharArray();
for (int i = 0; i < values.length; ++i) {
if (Character.isLetter(values[i]) && Character.isLowerCase(values[i])) {
values[i] = Character.toUpperCase(values[i]);
}
}
return new String(values);
}
}