JQuantLib is a comprehensive framework for quantitative finance, written in 100% Java. It provides "quants" and Java application developers several mathematical and statistical tools needed for the valuation of shares, options, futures, swaps, and other financial instruments. JQuantLib is based on QuantLib, a well known open-source library for quantitative finance, written in C++. JQuantLib aims to be a complete rewrite of QuantLib, offering features Java developers expect to find. It aims to be fast, correct, strongly typed, well-documented, and user-friendly.