The activity log is very useful for troubleshooting problems, and helps when developing plugins. jEdit writes the following information to the activity log:
Information about your Java implementation (version, operating system, architecture, etc)
All error messages and runtime exceptions (most of these display dialog boxes, as well; but the activity log usually contains more detailed information)
All sorts of debugging information that can be helpful when tracking down bugs
Information about loaded plugins
Some plugins may log additional information as well
Utilities>Activity Log displays a window showing the last 500 lines of the activity log. The complete log can be found in the activity.log file inside the jEdit settings directory, the path of which is shown inside the activity log window.
While jEdit is running, the log file on disk may not always accurately reflect what has been logged, due to buffering done for performance reasons. To ensure the file on disk is up to date, invoke the Utilities>Update Activity Log on Disk command. The log file is also automatically updated on disk when jEdit exits.
Figure A-1. The activity log