Having GUI components run on different threads breaks Swing’s single-threaded programming model. The program in Listing 5 isn’t quite realistic, but it serves to make my point.

This means that the program must be able to respond to these events; we call this event-driven programming, and it is a key concept in GUI programming. In Swing, we can add event listeners to widgets, ...

A GUI application’s acceptance test is not straightforward, but, in the case of Swing GUI applications, a small scaffolding utility can automate both unit and acceptance tests.

With these, developers can expand far beyond what was possible with traditional UI frameworks such as Swing and AWT. The role of Swing and Java's AWT Included as part of the original 1995 JDK release, ...