JDeveloper – accessing brackets on some keyboard layouts

Some keyboard layouts (Slovenian, Croatian and Serbian) use AltGr-n for } and AltGr-f for [ characters.
By default, these characters are not accessible in JDeveloper, which is quite annoying.

Fix
Go to Tools->Preferences, navigate to “Shortcut Keys”.
In the search box, enter “ctrl-alt-f” and remove assigned actions. Repeat for “ctrl-alt-n” combination.