Passing data from Microphone to FFT (Fast Fourier Transform) Class

I am quite new to Java and trying to find a way to use microphone and pass the data from microphone to a FFT Class and get the result back as one number (which will be the frequency). Because I am quite new, I am in need of some advice and description to solve this problem.
I will be glad if anybody experienced on this issue can help me.
Regards.

You need to read a good bit about signal analysis before you tackle this.
The FFT is an algorithm for the implementation of the Discret Fourier Transform (DFT). If you just perform an FFT of your data how are you then going to extract the frequency. For example, if you take the DFT of 1024 samples you will generate 1024 complex values with the to 512 pairs being complex conjugates of the bottom 512 pairs.
If you just choose the frequency with the largest magnitude then you will suffer from 'windowing' effects. You will need first to apply a 'window 'to your data so as to minimize the effects of only being able to use a limited length of data.
OK, so you have applied a window, performed the DFTand found the sample with the largest magnitude then how do you relate this frequency index to the real frequency?
If you Google for Java FFT I know you will be able to find an FFT implementation but that is just the start. You need to understand the DFT and how to use it and what it's limitations are and how to relate the results to the real world. You almost certainly cannot get that information from a Java forum. Java forums are for dealing with specific Java problems.
So! Go study some signal analysis before you start using the FFT on your microphone data.
A few words of warning. If you download an FFT implementation, make sure you test it extensively before you use it on your real data. I have tested about 10 and there are some rubbish implementations out there.

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-----------------modified code
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Dear Poster
Your thread has had no response since it's creation over
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Passing data from Microphone to FFT (Fast Fourier Transform) Class

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