帮我优化一下下面Java代码提高执行效率 private static String getStringFromFileFile fileint skipint n throws Exception String result = ; BufferedReader br = new BufferedReadernew FileReaderfile;

private static String getStringFromFile(File file, int skip, int n) throws Exception { StringBuilder result = new StringBuilder(); try (BufferedReader br = new BufferedReader(new FileReader(file))) { br.skip(skip); char[] buffer = new char[n]; int charsRead = br.read(buffer); if (charsRead != -1) { result.append(buffer, 0, charsRead); } } return result.toString(); }