Ideally, when a component's UI is uninstalled, it should leave no permanent effect on the component class. That way, when a new UI is installed, it only need worry about the "default" state of a component.

In reality, there are many cases when this is not the case, and multiple attempts to address this on a per-property level, by restoring individual properties.

A solution to this problem needs to be developed. Perhaps a new method could be added to JComponent to be called from setUI that will reset all UI state of the component.