java - I have created a date using SimpleDateFormat, how do I convert into a string?

newDate =(newDaysAdded+"/"+month+"/"+year); 
SimpleDateFormat date = new SimpleDateFormat("dd/MM/yyyy");
try {
  Date newDateOne = date.parse(newDate);

When I try:

view.writeToScreen(newDateOne);

I get the error:

 Incompatible types: Date cannot be converted to String.

Here is the writeToScreen method:

void writeToScreen(String s);

However from there I can't turn into a string, I have tried:
String test = Date.toString(newDateOne);

Can anyone help?