Java: Живопись Случайные фигуры на JFrame против музыки

Я trying to paint JFrame when music is played, эти фигуры создаются случайным образом без вычислений, а когда существует проблема some music played there pops up a JFrame and these shapes are painted there,, это то, что когда я запускаю этот код, музыкальный звук и фигуры не рисуются, а только кадр всплывает, и ничего больше, Plase проверьте этот код и помогите мне исправить его.

public class MusicBeatsDrawing {

    static JFrame frame; 
    DrawPanel dp =new DrawPanel();
    public static void main(String[] args)
    {
        MusicBeatsDrawing mbd= new MusicBeatsDrawing();
        mbd.go();

    }
    public void SetGui(){

        frame= new JFrame("Simple frame ; ");
        frame.setBounds(100, 100, 200, 200); 
        frame.setContentPane(dp);
        frame.setVisible(true);

    }

    public void go()
    {
        SetGui();
        try
        {
            Sequencer sequencer =  MidiSystem.getSequencer();
            sequencer.open(); 

            Sequence seq= new Sequence(Sequence.PPQ, 4);
            sequencer.addControllerEventListener(dp,new int [] {127});
            Track track =  seq.createTrack(); 
            int r  =  0; 
            for  (int  i  =  0; i  <  60 ; i+=  4) {

                r =  (int) Math.random()*50; 
                track.add(MakeEvent(144,1,r,100,i)); 
                track.add(MakeEvent(176,1,127,0,i)); 
                track.add(MakeEvent(128,1,r,100,i ));
            }
            sequencer.setSequence(seq);
            sequencer.start();
        }

        catch(Exception e)
        {e.printStackTrace(); }
    }

    public  MidiEvent  MakeEvent(int one , int two , int three , int four , int tick)
    {   
        MidiEvent event= null;
        try 
        {    
            ShortMessage sm= new ShortMessage();
            sm.setMessage(one,two, three, four);
            event= new MidiEvent(sm , tick );


        } catch (InvalidMidiDataException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return  event;   
    }
    class DrawPanel extends  JPanel implements ControllerEventListener
    {       
        boolean msg= false ; 


        public void paintComponent(Graphics g)
        {
            if(msg){ Graphics2D g2d= (Graphics2D) g; 

            int red= (int) (Math.random()*255); 
            int green= (int) (Math.random()*255) ;
            int blue= (int) (Math.random()*255); 

            g.setColor(new Color(red, green , blue));

            int height= (int)Math.random()*255;
            int width= (int)Math.random()*255;
            int x= (int)Math.random()*255;
            int y= (int)Math.random()*255;
            g.fillRect(height, width, x, y);        
            msg = false; 
            }
        }
        @Override
        public void controlChange(ShortMessage event) {
            msg= true; 
            repaint();          
        }}


}

import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.FlowLayout; import java.awt.Font; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.util.Random; import javax.sound.midi.ControllerEventListener; 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; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; /** * @see http://stackoverflow.com/a/17767350/230513 */ public class MidiDrawing { private static final Random R = new Random(); public static void main(String[] args) { EventQueue.invokeLater(new MidiDrawing()::display); } public void display() { JFrame frame = new JFrame("Midi Drawing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); DrawPanel dp = new DrawPanel(); frame.add(dp); Sequencer sequencer = initSequencer(dp); JPanel p = new JPanel(new FlowLayout(FlowLayout.RIGHT)); p.add(new JButton(new AbstractAction("Start") { @Override public void actionPerformed(ActionEvent e) { sequencer.setTickPosition(0); sequencer.start(); } })); frame.add(p, BorderLayout.SOUTH); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } private Sequencer initSequencer(DrawPanel dp) { try { Sequencer sequencer = MidiSystem.getSequencer(); Sequence seq = new Sequence(Sequence.PPQ, 3); Track track = seq.createTrack(); int n = 60; // middle C for (int i = 0; i < 3 * 12; i += 3) { track.add(new MidiEvent(new ShortMessage(ShortMessage.CONTROL_CHANGE, 0, 0, n), i)); track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_ON, 0, n, 127), i)); track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_ON, 0, n + 3, 127), i)); track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_OFF, 0, n, 127), i + 3)); track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_OFF, 0, n + 3, 127), i + 3)); n++; } sequencer.open(); sequencer.setSequence(seq); sequencer.addControllerEventListener(dp, new int[]{0}); return sequencer; } catch (InvalidMidiDataException | MidiUnavailableException e) { e.printStackTrace(System.err); } return null; } private static class DrawPanel extends JPanel implements ControllerEventListener { private final Font font = this.getFont().deriveFont(24f); private int data; @Override public void paintComponent(Graphics g) { g.setColor(Color.getHSBColor(R.nextFloat(), 1, 1)); g.fillRect(0, 0, getWidth(), getHeight()); g.setFont(font); g.setColor(Color.black); g.drawString(String.valueOf(data), 8, g.getFontMetrics().getHeight()); } @Override public void controlChange(ShortMessage event) { data = event.getData2(); repaint(); } @Override public Dimension getPreferredSize() { return new Dimension(256, 128); } } }

Ответ 1