codice:
public class ExcelReader {

    public static void readEmail() {
        Workbook wb = null;
        try {
            wb = Workbook.getWorkbook(new File("/home/matte/Desktop/email.xls"));
        } catch (IOException ex) {
            System.out.println(ex.getMessage());
        } catch (BiffException ex) {
            System.out.println(ex.getMessage());
        }
        Sheet sh = wb.getSheet(0);
        Cell cl = null;
        for (int i = 0; i < 100; i++) {
            if (!"".equals((sh.getCell(0, i)).getContents())) {
                cl = sh.getCell(0, i);
            }
        }
        String address = cl.getContents();
        System.out.println(address);
        wb.close();
    }

    public static void main(String[] args) {
        readEmail();
    }
}
ma l'errore nn è cambiato.