@Override
    public void onJoyButtonEvent(JoyButtonEvent evt) {
        // No-op implementation
    }
An abstract adapter class for {@link RawInputListener}.

This class provides empty implementations for all methods in the
{@link RawInputListener} interface, making it easier to create custom
listeners by extending this class and overriding only the methods of
interest.
jme3-core/src/main/java/com/jme3/input/RawInputListenerAdapter.java