Locale.setDefault(...)Dutch, German, Greek, Portuguese e.g. have your desired separator combination.
I am defining these patterns in a file.That should be no problem, shouldn't it?
I only want to load them from it without having to write codeWho is loading - you or that "black box"?
black box is doing it(reading from the file)That sounds as if there exists some description of what the black box is at least doing with the data in that file.
I thought if i could change the pattern itself to use the decimal separator i want it could work.I would also think so, provided the assumed description reads: "You can specify decimal and grouping separators in the ini file." If that's the case, turn to the black box author and complain.