All of the SwingComponents extend Resizable and respond to changing their width and height, but do not have the following properties set:
- maximumHeight
- maximumWidth
- minimumHeight
- minimumWidth
- preferredHeight
- preferredWidth

These are needed to layout the components properly by a Container. The workaround is to get the JComponent and inspect the properties directly as shown here:
                    var component = (node as SwingComponent).getJComponent();
                    maximumHeight = component.getMaximumSize().height;
                    maximumWidth = component.getMaximumSize().width;
                    minimumHeight = component.getMinimumSize().height;
                    minimumWidth = component.getMinimumSize().width;
                    preferredHeight = component.getPreferredSize().height;
                    preferredWidth = component.getPreferredSize().width;
(this is an excerpt from the JFXtras Grid layout algorithm)