public static String combineSplit(int startIndex, String[] string, String separator) {
        if (string == null) {
            return "";
        } else {
            StringBuilder builder = new StringBuilder();
            for (int i = startIndex; i < string.length; i++) {
                builder.append(string[i]);
                builder.append(separator);
            }
            builder.deleteCharAt(builder.length() - separator.length());
            return builder.toString();
        }
    }