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From: Frank Langelage <frank@lafr.de>
Newsgroups: comp.lang.java.programmer
Subject: Re: Fourier transform
Date: Wed, 21 Mar 2012 20:35:33 +0100
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On 21.03.12 15:07, bob wrote:
> What would be the easiest way to do a Fourier transform in Java?
>
> Thank you.
>
May be commons-math including 
http://commons.apache.org/math/apidocs/org/apache/commons/math3/transform/FastFourierTransformer.html 
gives you the solution.