What's new

Jep 3.2 Release | Feb. 14, 2008
A new release of Jep is now available! We made a bunch of improvements to the configurable parser component, making it even more powerful than before. Additionally you can now analyse parsed expressions, parse multiple expressions separated by semi-colons, and much more.

January Update | Jan. 19, 2008
2007 was a great year for us! The annual revenue more than doubled and sales have continued strong into the first weeks of January. Thank you for your feedback on our products, as we continue implementing the various improvements you request.

As of November, Nathan has started a full time job but will continue answering email and pushing out new releases on evenings and weekends. Richard will be coding features and bug fixes including an updated JEP Extensions package which is compatible with JEP 3. We look forward to releasing top quality solutions for you!

JEP 3.1 Release | Oct. 09, 2007
The 3.1 version of our main product was recently released. This update includes minor bug fixes and adds serialization support. The && and || operators now evaluate using short-circuit logic for faster performance and the functions min, max and avg have been added. Download the trial version, and take it for a spin!

Racing with JEP | Jul. 18, 2007
JEP is used in numerous different applications. We recently interviewed Stefan Windt about how he is using JEP in the telemetry system for the Lions Racing team in Germany. Read the full article here.

JEP

Java Math Expression Parser

Jep is an open-source Java library for parsing and evaluating mathematical expressions. With this API you can allow your users to enter an arbitrary formula as a string, and instantly evaluate it. JEP supports user defined variables, constants, and functions. A number of common mathematical functions and constants are included.

With over 500 downloads per month, the number of Jep users is rapidly growing. Have a look at the Jep example applets as well as AutoAbacus, to see Jep in action!

AutoAbacus

Equation solving library

AutoAbacus is a powerful equation solving library that finds solutions to equation sets with a snap. Equations are passed to AutoAbacus as text, while the program attempts to find a solution that satisfies all constraints.