marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface Why do you need marker interface in Java marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface Why do you need marker interface in Java marker interface Why use Marker interface in Java marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface marker interface Why do you need marker interface in Java Why do you need marker interface in Java marker interface marker interface marker interface marker interface marker interface Why use Marker interface in Java marker interface marker interface marker interface marker interface marker interface marker interface