jFin is a pure Java implementation of financial
date arithmetic. It includes date adjustments,
schedule generation, offsets, and day count
calculations. It supports FBA Actual/Actual,
Actual/360, Actual/365 Fixed, Business/252,
European 30/360, ISDA Actual/Actual, ISMA
Actual/Actual, Italian 30/360, and US 30/360. It
is designed to be trivial to integrate with legacy
holiday calendar providers and day count
calculators.