No. Registering just tells the Java system where to send
the events. They go in one direction, from GUI component
(in this case the close button) to event listener
(in this case
This program is suitable for "copy-paste-save-and-run" using Notepad. It would be a really good idea to try it, and to hack upon the program a bit. You no longer have to type control-c to kill the program; just click on the close-window button.
C:\> javac GUItester.java C:\> java GUItester C:\>