JavaFX

For the real pros, java awt and swing are somewhat old
hat. The library to use is JavaFX. To do so from Eclipse,
one needs to go to the Eclipse Marketplace (from the help menu),
and request JavaFX.

https://youtu.be/Jj3dVl8_DW8

                                                          *     *     *

Below, beginner code for a Hello World App. Noteworthy: the use of

override. In the context of OOP, this means the necessity to implement

an abstract class!

The coder has left two openings for us: on initiation, we can add stuff. On

close, we can clean up the resources on the window!!

https://www.callicoder.com/javafx-desktop-application-development-tutorial/