regexes for parsing formatted numbers

Question

I am parsing documents which contain large amounts of formatted numbers, an example being:

 Frc consts  --     1.4362                 1.4362                 5.41         


        

Answer 1

It is only a partial answer but I was alerted to Scanner in Java 1.5 which can scan text and interpret numbers which gives a BNF for the numbers that can be scanned and interpreted by this Java utility. In principle I imagine the BNF could be used to construct a regex.