Addintion in year fields of sql date in a java page

In my database i have a field StartDate and EndDate Now entering date from my jsp and fetching it in the servlet

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {


              Date date = new Date(request.getParameter("date"));
              SimpleDateFormat simpleDateformat=new SimpleDateFormat("yyyy");
              System.out.println("Year: " + simpleDateformat.format(date));
             String k= simpleDateformat.format(date);
            }

But I have to add 4 with the year value and generate the date after 4 years of Starting Date and store it into the database

March 31, 2012 at 1:12 PM

The given code is useful.

try{
DateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");
 Date d=(Date)formatter.parse("30-03-2012");
 Calendar cal=Calendar.getInstance();
 cal.setTime(d);
cal.add(Calendar.YEAR, 4);  
String newdate = formatter.format(cal.getTime());
System.out.println(newdate);
     }
     catch(Exception e){}