class StringUtils {

    public static String join(Object[] a, char delimiter) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < a.length; i++) {
            sb.append(a[i]);
            if (i != a.length - 1) {
                sb.append(delimiter);
            }
        }
        return sb.toString();
    }

    private  StringUtils();

}