<%@ page language="java" import="java.util.*"%>
<%
String username=request.getParameter("username");
if(username==null) username="";
Date now = new Date();
Cookie cookie = new Cookie ("username",username);
cookie.setMaxAge(365 * 24 * 60 * 60);
response.addCookie(cookie);
%>
Saving Cookie
<%
cookie.setMaxAge(0);
%>
Cookie Age is set to zero..Output of cookie.getMaxAge() --
<%out.println(cookie.getMaxAge());%>
Cookie is deleted automatically by setting it's value to zero