A comparison study between different FFT algorithms implemented in Java as part of the bachelor's degree. Implemented algorithms: Furier transform by definition, radix-2 (DIT) recursive, radix-2 (DIT) iterative, radix-2 (DIF) recursive, radix-4 (DIT) recursive, radix-4 (DIF) recursive, radix-4 (DIT) iterative, split radix (DIT), split radix (DIF), Bluestein's algoritm.