I have tried Swing and it is really a very tough task to build modern GUIs of following kind
But at the same time It would be good to keep java alongwith for the logical part as Java has a lot to offer like JAXP and other add-on APIs. Tools like WindowBuilder or other JavaGUI Builder though make the task easy but still crappy GUI.
I wanted to know,if there is any tool that provides such good GUI and also supports java.
If not available,what those guys at Windows App Store or Android App store use to develop such kind of apps with such a nice GUI.
(I am a tyro to GUIs and doesn't know the hacks or tools they use.It would be helpful if you just touch those points/techniques to give an idea). Please do not downvote.Its a dream project.