Though you could still consider continuing with what you have.
In one of the links I provided it read:
If someone is using Oracle JDK 8 to run commercial software, after January 2019 do they need to purchase a license?
No. The user can continue to use Oracle JDK 8 indefinitely without paying. The only cost is if they want to get updates beyond Jan 2019, in which case they will need to purchase an "Oracle Java SE subscription.
Also, this was there:
Starting with Java SE 11, neither the OpenJDK builds or the Oracle JDK binaries include the JavaFX libraries. The JavaFX components will now be delivered as a separate SDK, or as artifacts that can be used via build tools (e.g. Apache Maven, Gradle et al.). As a positive consequence of this decoupling, JavaFX development can now have its own roadmap.
JavaFX is still being developed in OpenJFX, which is a project under the OpenJDK community umbrella.
So if JDK8 is fine for you then you could continue with your project with no worries, then probably later you could switch to OpenJDK 11 which can be interchanged with Oracle's JDK11.
In case you didn't go through the links I provided, I strongly recommend you go through them as they would address the questions you might have :)
You could go for OpenJDK to avoid any hassle.
Though you could still consider continuing with what you have.
In one of the links I provided it read:
If someone is using Oracle JDK 8 to run commercial software, after January 2019 do they need to purchase a license?
No. The user can continue to use Oracle JDK 8 indefinitely without paying. The only cost is if they want to get updates beyond Jan 2019, in which case they will need to purchase an "Oracle Java SE subscription.
Also, this was there:
Starting with Java SE 11, neither the OpenJDK builds or the Oracle JDK binaries include the JavaFX libraries. The JavaFX components will now be delivered as a separate SDK, or as artifacts that can be used via build tools (e.g. Apache Maven, Gradle et al.). As a positive consequence of this decoupling, JavaFX development can now have its own roadmap.
JavaFX is still being developed in OpenJFX, which is a project under the OpenJDK community umbrella.
So if JDK8 is fine for you then you could continue with your project with no worries, then probably later you could switch to OpenJDK 11 which can be interchanged with Oracle's JDK11.
In case you didn't go through the links I provided, I strongly recommend you go through them as they would address the questions you might have :)
Thank you, this really cleared up my doubts. I'll definitely consider moving to OpenJDK 11 and add OpenJFX via Maven.