I’m trying to run this JSP code but it doesn’t work, I get HTTP Status 500. Why? Aren’t switch expressions supported? I do not want to use a switch statement, so please do not tell me to use this old version of the switch.

Note: this question is not a duplicate of if-else-in-jsp-switch-case which is about == vs .equals() in relation to switch. This question is about the validity of the arrow -> syntax in recent versions of JSP.

The code I’m trying to run:

            </li>
                <p>GENERE: 
                    <%= switch(request.getParameter("genere")){
                        case "m" -> "Maschio";
                        case "f" -> "Femmina";
                        case "a" -> "Altro";
                        default -> "non selezionato";
                        }            
                    %>
                </p>
            </li>

The error I get: