Best way to mask a web dynpro view field

hey guys ,

i was wondering , what would be the best way to mask a field in web dynpro.

the way i am doing this is i get a value (float ) and pass it to a method i have on my context that uses the java NumberFormat to apply #####.## and it returns a string.

but since all i want to do is on the field i want to show the value as a price ( i.e 999.99 ) always with double digits

TIA,

Guy