I've just come across an oddity with JavaFX and Swing.
When disposing a JavaFX Panel that had been added to a JFrame or JPanel, re-adding a new JFXPanel will throw an IllegalStateException: "Platform.exit has been called".
In my case this has happened after I removed some JPanels with JFXPanels inside and then tried to re-add them.
Luckily I found a solution in an Oracle Forum. Link: https://kr.forums.oracle.com/forums/thread.jspa?threadID=2393986
In JavaFX 2.2 add the following line in the Main class:
Platform.setImplicitExit(false);
This has done the trick in my application and will hopefully help some of you out there.
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