Question

I’m looking for a good easy to use Java based Quadratic Programming (QP) solver.

Googling around I came across ojAlgo (http://ojalgo.org).

However, I was wondering if there are any other/better alternatives.

Answer 1

Have a look at Apache Commons Math. I haven’t used ojalgo, and I really can’t say I’ve used Commons Lang enough to be able to provide you with a lot of details, but it did do what I needed.

Description from their website:

Commons Math is a library of
lightweight, self-contained
mathematics and statistics components
addressing the most common problems
not available in the Java programming
language or Commons Lang.

Guiding principles:

1. Real-world application use cases determine development priority.
2. This package emphasizes small, easily integrated components rather
   than large libraries with complex
   dependencies and configurations.
3. All algorithms are fully documented and follow generally
   accepted best practices.
4. In situations where multiple standard algorithms exist, a Strategy
   pattern is used to support multiple
   implementations.
5. Limited dependencies. No external dependencies beyond Commons
   components and the core Java platform
   (at least Java 1.3 up to version 1.2
   of the library, at least Java 5
   starting with version 2.0 of the
   library).