The advanced graphical toolkit for the [Java] programming language.  Can do absolutely amazing things with graphics and its i18n handling, but is still a complete PITA!

One notable feature of Swing is its use of a [Model / View / Controller] paradigm.  If what you're doing can fit the models they provide, working with Swing can be a lot easier.  So long as you don't care about getting [focus] handling right... :^/



Developers generally likes Swing's [alpha transparency] and [antialias]ing.  On the other hand, Java2D is slow and, as [DKF]
has written, "IMO what swing needs is idle handling like [Tk]'s.  Since it's that which makes Tk seem like greased lightning. 
The other big issue with Swing is just how fragile it is. 
It's way too easy to blow things up and bust [event] handling during development. >:(  
Javasoft have never really understood non-threaded multiprocessing."

[DKF]: If you're interested in mixing [Tcl] and Java/Swing, see [Swank].
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[Category Java] | [Category GUI] | [Category Graphics]