I use sticky notes to record some information. I deleted this info by accident. Is it recoverable?
As far as I know, the content for your stickies notes is stored in $HOME/Library/StickiesDatabase. If you are using Time Machine, or some other mechanism to do back-ups for your data that include this database, then you can try restoring an older version of this database to recover your data. Because of the way the Stickies app maintains its data (in a database), without access to some previous version of the database file, there's really no way to reliably recover Stickies notes.