public class Solution {
        public static String capitalizeFirstLetter(String text) {
        if (text == null || text.isEmpty()) return "";

        StringBuilder sb= new StringBuilder(text);
        char first= sb.charAt(0);
        if (Character.isLowerCase(first)) {
            sb.setCharAt(0, Character.toUpperCase(first));
        }
        return sb.toString();
    }
}