Numerical integration in Java?

Question

Are there any libraries for Java to do numerical integration? I did ask google but failed to find anything, so should I implement my own methods (like trapeze method, simpson's method or whatever, it's been some time since I had my numerical analysis class)?

Answer 1

Is this what you're looking for? It's a java class that contains the Gauss-Legendre quadrature, trapezoidal rule and Forward and Backward rectangular rules for integration.

Answer 2

See point 4.4 in the description of the Commons Math org.apache.commons.math.analysis.integration package