Is there a method in Java that can do integration?

Question

I am writing a program in java that models a carnot engine and I want to calculate the work done and I need to use integration. I have been looking around on google and haven't found quite what I am looking for, have any suggestions?

Answer 1

Apache Commons Math contains ready implementations for integration and much more.

Java Number Cruncher is a good book if you want to do it yourself.

Answer 2

You have to use an external library, like this one or this other one. You cannot do that with just native methods (well, unless you implement the integration algorithm yourself like the others answers suggest, which I think it's not what you want - otherwise you weren't asking here :-)