Otra posibilidad:
http://en.wikipedia.org/wiki/Swing_(Java)
NOTE: The word set is used to denote that something is comprised of more than one thing or person: examples: jetset (wealthy people who jet around the world); chess set; desk set (articles on top of a desk); toolset; playset; dishset; etc.
Swing Set (or set) could mean a children's playground toy or a set of computer programs or features developed by a company named Swing as in the example below.
(It could also mean a group of people who like to dance to "swing", a type of music from the 1940s.
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So it is important to understand the full context of the presentation.
Swing is a widget toolkit for Java. It is part of Sun Microsystems' Java Foundation Classes (JFC) — an API for providing a graphical user interface (GUI) for Java programs.
Swing was developed to provide a more sophisticated set of GUI components than the earlier Abstract Window Toolkit. Swing provides a native look and feel that emulates the look and feel of several platforms, and also supports a pluggablelook and feel that allows applications to have a look and feel unrelated to the underlying platform.