How to convert WAV audio to frequency file in JAVA?

ByteArrayOutputStream out = new ByteArrayOutputStream();
                running = true;
                int n = 0;
                byte[] buffer = new byte[(int) 1024];
                try { while (running) {
                               n++;
                    if (n > 200000){break;}                  
                    int count = 0;
                    count = outDinSound.read(buffer, 0, 1024);
                        if (count > 0) {out.write(buffer, 0, count);}
                                      }
                    byte b[] = out.toByteArray();
<pre>final int totalSize = b.length;
                    int amountPossible = totalSize / 1024;
                    System.out.println("Frequencies captured: "+totalSize+"         "+amountPossible+" * 1024");
                    System.out.println("_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _");                  
                    Complex[][] results = new Complex[amountPossible][];
                    System.out.println("                    * * *   STARTING ANALYSIS   * * *");
                    for (int times = 0; times < amountPossible; times++) {
                        Complex[] complex = new Complex[1024]; 
                        for (int i = 0; i < 1024; i++)                                   {
                        complex[i] = new Complex(b[(times * 1024) + i], 0);              }
                        results[times] = FFT.fft(complex);
                                                                         }