db.lck and dbex.lck files

[Tim Dudgeon]

I'm wanting to provide some feedback in my application when a derby 
database is opened and it was not shutdown properly last time it was used.

2 files seem to be created, db.lck and dbex.lck and are not deleted when 
the db is not shutdown cleanly.

Is there a way of distinguishing between the presence of these files 
being the result of a current process holding a lock on an open database 
(in which case the database cannot be opened) and it being the result of 
a bad shutdown, in which case the database can be opened, but there may 
be a delay whilst it is opened.

thanks

Tim