Adding Cookies in Java/Liferay

In Liferay , when user is logging into ,he/she can remember username . so that whenever user again  tries to login no need to enter his crenditinals.

Following are things liferay is doing to add username in cookie in LoginUtil.java


Cookie loginCookie = new Cookie(CookieKeys.LOGIN, login);

if (Validator.isNotNull(domain)) {    // Here domain is "www.liferay.com"
loginCookie.setDomain(domain);
}

loginCookie.setMaxAge(loginMaxAge);  // Age of the Cookie

loginCookie.setPath(StringPool.SLASH);

   CookieKeys.addCookie(request, response, loginCookie, secure);