Naive option

accept.java

public String negotiateFormat(HttpServletRequest request) {
    String format = request.getParameter("format");
    if (format == null)
        format = getFormatFromUriExtension(request);
    if (format == null)
        format = getFormatFromAcceptHeader(request);
    if (format == null)
        format = "html";
    return format;
}

accept.scala

def negotiateFormat(request: HttpServletRequest) =
    request.getParameterOption("format")
        .orElse(getFormatFromUriExtension(request))
        .orElse(getFormatFromAcceptHeader(request))
        .getOrElse("html")

map.scala

println(name.map("Hello " + _ + ", how are you?").getOrElse("Hello, how are you?"))

naive.scala

val name: Option[String] = Some("Erik")

if (name.isDefined)  // if (name != null) in Java
    println("Hello " + name.get + ", how are you?")
else
    println("Hello, how are you?")