@GET
@Produces("text/html")
@Path("/myrequest")
public Response myRequest(@Context HttpServletRequest request) {
    Locale locale = ...
}

public Response myRequest(@Context HttpServletRequest request) {
Locale locale = request.getLocale();
...
}

@GET
public Response myRequest( @Context HttpServletRequest request )
{
   Locale locale = request.getLocale();
   ...
}

@GET
public Response myRequest( @QueryParam( "language" ) String language )
{
   ...
}

@GET
public Response myRequest( @HeaderParam( "Accept-Language" ) String acceptLanguage )
{
   ...
}