Reclaiming space from Derby

[Paul Taylor]

HI, I use derby in embedded mode, I let the user specify a maxmium size 
for the derby database files, my program monitors this and if it goes 
over the size I use SQL to delete records that are no longer necessary 
in the hope of shrinking the database files size, but it doesn't, how 
can I force Derby to shrink back down ?

thanks Paul