Wrong format on String to Date conversion

Question

I have the following date in format String: 12-12-2017

I’m trying to pass this figure to java.util.Date. I’m trying like this:

SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");
            final String valor = cell.getStringCellValue();
            return formatter.parse(valor);

The problem is that my return is like this:

Tue Dec 12 00:00:00 BRST 2017

I want it to go back exactly as it is in String, someone knows how I can solve ?