Java扫描指针在静态方法之间的问题

我的扫描仪有问题。如果我把扫描器传递到一个静态方法中,扫描器就不能读取在主函数中给出的文件。当我将文件对象传递到scanner,然后将scanner传递到add函数时,它不会将文件内容输出到控制台。但是,如果我将添加功能的扫描器部分注释掉,扫描器的读数将很好。这让我相信扫描器可以看到文件,但不能从中读取。我的问题是,我应该如何再次从文件中读取数据,这次是在添加函数中?

public static void main(String[] args) throws IOException
{
    File file = new File("vinceandphil.txt");

    if (file.createNewFile())
    {
        System.out.println("New file was created");
    }
    else {
        System.out.println("File already exists");
    }
    Scanner sc = new Scanner(file);

    FileWriter writer = new FileWriter(file);
    writer.write("Test data\n");
    Add(file, writer, sc);
    writer.close();

    while (sc.hasNextLine())
    {
        System.out.println(sc.nextLine());
    }

    sc.close();

}

public static void Add(File f, FileWriter w, Scanner scanner) throws IOException
{

    if (f.exists())
    {
        w.write("Got em coach\n");
        w.write("We need more info\n");
        w.write("Come again\n");
    }

    while (scanner.hasNextLine())
    {
        System.out.println(scanner.nextLine());
    }

}