String[]中添加元素

private static String[] insert(String[] strings, String string) {
        if (strings == null) {
            strings = new String[0];
        }
        if (string.isEmpty()) {
            LOGGER.error("Empty string.");
            return null;
        }
        String[] resultString = new String[strings.length + 1];
        for (int i = 0; i < strings.length; i++) {
            resultString[i] = strings[i];
        }
        resultString[strings.length] = string;
        return resultString;
    }