Make invalid Java selections impossible in the web UI

[michael-simons]

The site lets you select Spring Boot 3 + JDK 11 or 8. The generate (Maven) project will still have JDK 17 defined in it. Not a big, but UX can be improved to disable invalid combinations.

[wilkinsona]

Thanks for the suggestion. Unfortunately, with all of the different clients (web UI, CLI, IDE plugins) it isn't possible to disable invalid combinations consistently. For now, we've settled on adding a note to the generated HELP.md that explains what has happened. #250 is tracking further improvements in this area.

[michael-simons]

Kinda odd that this works though

But I see, I am not the only person who stumbled upon this 🤷

[wilkinsona]

Yeah, it is odd. There are some implementation details of how the service is implemented and describes it capabilities leaking out and that's unfortunate. The reason it works for dependencies is that the metadata allows a dependency to describe the versions of Spring Boot with which it is compatible. There's nothing similar for Java versions unfortunately but it would definitely be a nice thing to have. We'll have to see where #250 and our limited bandwidth takes us.

[michael-simons]

Thanks for the explanation, appreciated.