On what to build a flexible interface for a Desktop application in JAVA?

Question

Java

Greetings! Wrote an application in JAVA, now you need to "pull" an interface on it. For example, to do on the same Swing is labor-intensive, not flexible and not beautiful. The ideal option for me would be html + CSS, located in the form window of the application. How to connect these technologies, if of course it's worth it? Or suggest another option for interface development. At one time, I liked the Delphi approach - I placed the components on the form and wrote handlers.
Thank you.

Answer 1

JavaFX. There is a WebView, you can do it with html + CSS.

Answer 2

What is your vague statement of the question. Write what you like Delphi with the arrangement of components with the mouse and before that you want the flexibility of html + css.
The Delphi approach and even a little more will give the usual awt\swing, you can apply skins to it or, say, override the paint method on the component and make it whatever your heart desires.
If css is familiar, then feel free to take JavaFX and the Scene builder, then out of the box there will be css, albeit a little neutered.
If you want only and only pure html + css, then they wrote the answer above. WebView from JavaFX and a pack of crutches into it.