构造函数File（String）未定义...如何删除此错误？

Question

如何解决File(String) is undefined错误？

int classi(String s) throws BiffException, IOException {
    String[] words = s.split(" ");

    Workbook workbook = Workbook.getWorkbook(new File("D:\feat.xls"));
    Sheet sheet = workbook.getSheet(0);
}