Why is Swing threading model considered wrong and how should it be? [closed]

by

Brian Goetz’s Java Concurrency in Practice,

9.1 Why are GUIs single-threaded?:

…In the old days, GUI applications were single-threaded and GUI events
were processed from a “main event loop”. Modern GUI frameworks use a
model that is only slightly different: they create a dedicated event
dispatch thread (EDT) for handling GUI events. Single-threaded GUI
frameworks are not unique to Java; Qt, NextStep, MacOS Cocoa, X
Windows, and many others are also single-threaded. This is not for
lack of trying; there have been many attempts to write multithreaded
GUI frameworks, but because of persistent problems with race
conditions and deadlock, they all eventually arrived at the
single-threaded event queue model in which a dedicated thread fetches
events off a queue and dispatches them to application-defined event
handlers…

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