I want to change the Title in servlet

if (serviceOperation.getContentDisposition().equalsIgnoreCase("inline")) {
                                response.setHeader("Content-disposition","inline; filename=\"" + reportFileName    + "\"");
                            } else {
                                response.setHeader("Content-disposition","attachment; filename=\"" + reportFileName    + "\"");
                            }
                            response.setContentType(mimetype);
                            response.getOutputStream().write(Base64.decode(content));

How could I set the Browser Title in Above code

please help me