How to make Drag'n'Drop interface with links between elements?

Question

Java

Good day to all! The question is quite extensive and I would like to know your opinion.
Now there is a need to write an application in which it would be possible to move elements to the work surface, establish a connection between them and then generate all this in json. The most ideal example of this is https://www.youtube.com/watch?v=FJWRFN8xHFY ,
then almost 90% of what I need. I looked at his blog, downloaded his project from github ( NodeLink ), but in the end I didn’t quite figure out how to install and get a connection there
But the question is, I myself am a Java programmer, but I have never worked with javafx before. Is there any reason to do this in Java, or is it easier to deal with JavaScript? Or maybe someone has some similar template solutions? I would be very grateful

Answer 1

Drag'n'Drop itself is done quite simply, the interface nodes are also quite easy to manage and customize, here the problem may arise rather with the io of these nodes.