Info

public static void displayMixerInfo() {
    Mixer.Info[] mixersInfo = AudioSystem.getMixerInfo();

    for (Mixer.Info mixerInfo : mixersInfo) {
        System.out.println("Mixer: " + mixerInfo.getName());

        Mixer mixer = AudioSystem.getMixer(mixerInfo);

        Line.Info[] sourceLineInfo = mixer.getSourceLineInfo();
        for (Line.Info info : sourceLineInfo)
            showLineInfo(info);

        Line.Info[] targetLineInfo = mixer.getTargetLineInfo();
        for (Line.Info info : targetLineInfo)
            showLineInfo(info);
    }
}

private static void showLineInfo(final Line.Info lineInfo) {
    System.out.println("  " + lineInfo.toString());

    if (lineInfo instanceof DataLine.Info) {
        DataLine.Info dataLineInfo = (DataLine.Info) lineInfo;

        AudioFormat[] formats = dataLineInfo.getFormats();
        for (final AudioFormat format : formats)
            System.out.println("    " + format.toString());
    }
}

displayMixerInfo();

//Displays:
//  Mixer: Primary Sound Driver
//    interface SourceDataLine supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//    interface Clip supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//  Mixer: Speakers (High Definition Audio Device)
//    interface SourceDataLine supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//    interface Clip supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//  Mixer: Digital Audio (S/PDIF) (High Definition Audio Device)
//    interface SourceDataLine supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//    interface Clip supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//  Mixer: Digital Audio (S/PDIF) (High Definition Audio Device)
//    interface SourceDataLine supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//    interface Clip supporting 8 audio formats, and buffers of at least 32 bytes
//      PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
//      PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
//      PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
//  Mixer: Port Speakers (High Definition Audio
//    SPEAKER target port
//  Mixer: Port Digital Audio (S/PDIF) (High De
//    Master Volume target port
//  Mixer: Port Digital Audio (S/PDIF) (High De
//    Master Volume target port