Wsrtjtyk

My cmd gives me the following reply

Error: A JNI error has occurred, please check your installation and try 

again

Exception in thread "main" java.lang.UnsupportedClassVersionError: 

musicplayer has been compiled by a more recent version of the Java Runtime 

(class file version 55.0), this version of the Java Runtime only recognizes 

class file versions up to 52.0

    at java.lang.ClassLoader.defineClass1(Native Method)

    at java.lang.ClassLoader.defineClass(Unknown Source)

    at java.security.SecureClassLoader.defineClass(Unknown Source)

    at java.net.URLClassLoader.defineClass(Unknown Source)

    at java.net.URLClassLoader.access$100(Unknown Source)

    at java.net.URLClassLoader$1.run(Unknown Source)

    at java.net.URLClassLoader$1.run(Unknown Source)

    at java.security.AccessController.doPrivileged(Native Method)

    at java.net.URLClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source) 

I reinstalled Java SE and JDK multiple times. I also searched online or a solution for about an hour but couldnt find an awnser. I got Java SE and JDK on the latests version.
Java versions

Here is my code, regardless if the code does what its supposed to do, I would like to get it running

        import javax.sound.midi.InvalidMidiDataException;

    import javax.sound.midi.MidiEvent;

    import javax.sound.midi.MidiSystem;

    import javax.sound.midi.MidiUnavailableException;

    import javax.sound.midi.Sequence;

    import javax.sound.midi.Sequencer;

    import javax.sound.midi.ShortMessage;

    import javax.sound.midi.Track;





    public class MusicPlayer {



    public static int frequencyToMidi(double frequency) {

    //TODO return midi note. hint: round the result and cast it to an integer



    double p;

    p=69+12*(Math.log(frequency/440)/Math.log(2));

    Math.round(p);

    int pp = (int)(p);



    return 0;

}



    public static MidiEvent makeEvent(int command, int channel, int firstByte, int secondByte, int tick) throws InvalidMidiDataException {

    //TODO return midi event. hint: use short message



    ShortMessage msg = new ShortMessage();

    msg.setMessage(command, channel, firstByte, secondByte);

    MidiEvent event = new MidiEvent(msg, tick);



    return null;

}



public static void addNote(Track track, int channel, int midiNoteNumber, int velocity, int tickOn, int tickOff) throws InvalidMidiDataException {

    //TODO add note on/off. hint: use ShortMessage.NOTE_ON and ShortMessage.NOTE_OFF



    MidiEvent event1 = makeEvent(ShortMessage.NOTE_ON, 1, midiNoteNumber, velocity, tickOn);

    track.add(event1);

    MidiEvent event2 = makeEvent(ShortMessage.NOTE_OFF, 1, midiNoteNumber, velocity, tickOff);

    track.add(event2);

}



public static void fillTrack(Track track) throws InvalidMidiDataException {



        MidiEvent event3 = makeEvent(ShortMessage.CONTROL_CHANGE, 1, 127, 1, 0);

        track.add(event3);

        MidiEvent event4 = makeEvent(ShortMessage.PROGRAM_CHANGE, 1, 1, 0, 0);

        track.add(event4);





    addNote(track, 1, frequencyToMidi(659.26), 100, 1, 3);

    addNote(track, 1, frequencyToMidi(622.25), 100, 5, 7);

    addNote(track, 1, frequencyToMidi(493.88), 100, 9, 11);

    addNote(track, 1, frequencyToMidi(587.33), 100, 13, 15);

    addNote(track, 1, frequencyToMidi(523.25), 100, 17, 19);

    addNote(track, 1, frequencyToMidi(440), 100, 21, 25);



    //TODO change control. hint: use ShortMessage.CONTROL_CHANGE

    //TODO change program. hint: use ShortMessage.PROGRAM_CHANGE



    //TODO add note using your implementation of addNote

}



public static void main(String args) throws MidiUnavailableException, InvalidMidiDataException {

    //initializes a sequencer and creates a track on it with a tempo of 220 bpm

    Sequencer sequencer = MidiSystem.getSequencer();

    sequencer.open();



    Sequence seq = new Sequence(Sequence.PPQ, 4);

    Track track = seq.createTrack();



    fillTrack(track);



    sequencer.setSequence(seq);

    sequencer.setTempoInBPM(220);



    //plays the track

    sequencer.start();

}

}