Enregistrer le son à partir du micro

Je cherche à enregistrer le son provenant d'un microphone en java
Le bout de code suivant :

private void test(){
        try {
            info = AudioSystem.getMixerInfo();
        } catch (Exception e) {
            e.printStackTrace();
        }
        Port in;
 
        for (int i = 0; i < info.length; i++) {
            System.out.println("Setting mixer: " + info[i]);
            try {
               Mixer mixer = AudioSystem.getMixer(info[i]);
               in = (Port)mixer.getLine(Port.Info.MICROPHONE);
               in.open();
               System.out.println("Microphone selected.");
               break;
            } catch (Exception e) {
                System.out.println("Microphone unsupported.");
            }
        }
    }

me renvoie :
Setting mixer: Intel [plughw:0,0], version 1.0.14
Microphone unsupported.
Setting mixer: Intel [plughw:0,6], version 1.0.14
Microphone unsupported.
Setting mixer: Java Sound Audio Engine, version 1.0
Microphone unsupported.
Setting mixer: Port Intel [hw:0], version 1.0.14
Microphone unsupported.

Comment je peux faire?