Thanks, Maneesh and Ulf. I guess it might have been part of Swing before Swing was made a part of core.
I've filed a documentation bug report and have received this auto-response.
Dear Java Developer,
Thank you for reporting this issue.
We have determined that this report is a new bug and entered the bug into our internal bug tracking system under Bug Id: 7049405.
You can monitor this bug on the Java Bug Database at
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7049405.
It may take a day or two before your bug shows up in this external database. If you are a member of the Sun Developer Network (SDN), there are two additional options once the bug is visible.
1. Voting for the bug
Click http://bugs.sun.com/bugdatabase/addVote.do?bug_id=7049405.
2. Adding the report to your Bug Watch list.
You will receive an email notification when this bug is updated.
Click http://bugs.sun.com/bugdatabase/addBugWatch.do?bug_id=7049405.
The Sun Developer Network (http://developers.sun.com) is a free service that Sun offers. To join, visit https://softwarereg.sun.com/registration/developer/en_US/new_user.
Regards,
Java Developer Support
Two of those links take you to a login page which hangs forever after submitting, and the third redirects to
http://www.oracle.com/technetwork/index.html. The fourth just doesn't exist.
Goes to show just how much Oracle is committed to the Java community