Method toLowerCase

src/main/java/com/thealgorithms/strings/Lower.java:23–31

Converts all of the characters in this String to lower case @param s the string to convert @return the String, converted to lowercase.

(String s)

     * @return the {@code String}, converted to lowercase.
     */
    public static String toLowerCase(String s) {
        char[] values = s.toCharArray();
        for (int i = 0; i < values.length; ++i) {
            if (Character.isLetter(values[i]) && Character.isUpperCase(values[i])) {
                values[i] = Character.toLowerCase(values[i]);
            }
        }
        return new String(values);
    }
}