[ptx]

The next time you use a Swing app, look for these examples of how it "pulls it off well":

* The first time any particular window is opened, Swing draws the contents but then changes its mind about the window size, recalculates the layout and then redraws the contents again slightly differently.

* When Swing creates a window, you can sometimes observe how creates it in the wrong spot and then moves it to where it was supposed to be created.

* Alt-tabbing quickly between two windows in a Swing application doesn't always work. It sometimes just glitches and leaves you in the window you started with. (Confirmed just now on Windows 10 with Java 17. The bug has been there for many, many years.)

* When opening a submenu of a menu, Swing does nothing to handle the problem of the menu closing again as you're moving towards it but accidentally mouse over an adjacent item. Platform GUI toolkits solve this either with a delay or by tracking the direction of the movement. IntelliJ implements its own menu bar to make this work.

* Try to find an example of a window that is resizable in only one direction or only up to a certain maximum size. As far as I can tell, this is not possible in Swing, and applications handle this limitation by designing all UIs to be resizable even when it doesn't make any sense.