Is this the best way to redirect using servlet?

Question

I making a servlet application where the user sends some FORM value to a servlet. I want the servlet to redirect to the answer page after processing the page. Do you think the following code is the correct way of doing?
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String dnaText = request.getParameter("dnaText");
        /*Getting the tranlated output from dnaToRna method*/
        String finalVal = null;
        String link="http://www.mail.yahoo.com";
        try{
             finalVal = String.valueOf(dnaToRna(dnaText));
             response.sendRedirect(link);
            }catch(Exception ex){}
    }

Answer 1

Many thanks for replying.
My output file have lots of html code and I dont want to make my servlet heavy with unnecessary code. So I have decided to use another page result.jsp as output file. In result.jsp I intend to call these objects which is storing the value here to display the result.
As I am new to jsp. I am still in the processing of thinking the best way to handle errors. I have created a method which takes in int values and returns corresponding String values. Like this
public class DnaToRna extends HttpServlet {
   String error=" * NULL *";
private String printError(int i) {
        if(i==1){
            error = "There is an error in String to char array";
        }else if (i==2){
            error = "There is an error in your DNA sequence";
        return error;
    }Since error is declared as a class object, if there is no error then I think it should rerun the String NULL. Which can be used to tell people if there is no error. On the contrary if there is really an error, I can use this to tell what is exactly causing the error.
Although I am new to web programing. I think this would be nice.
Here is the other method
public String dnaToRna (String dnaText) throws Exception{
            /*Trim()*/
            dnaText = dnaText.trim();
            /*Codes for Dna to Rna translation*/
            if(Pattern.matches(".*[^atgc]+.*",dnaText))
            return printError(2);
            return dnaText.replaceAll("t","u");
            }