You are currently on page NavigationB.
setForward("/navigation-a.jsp");
To forward to NavigationA passing the parameter ${forwardParamLink.value} click
here.
getContext().getRequest().setAttribute("param", param); setForward("/navigation-a.jsp");
setRedirect("/navigation-a.jsp");
To redirect to NavigationA passing the parameter ${redirectParamLink.value} click
here.
setRedirect("/navigation-a.jsp?param=" + param);
Take notice of the different URLs in your browser when you use forward and redirect.