Precisando de ajuda para um trabalho da faculdade

/*
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package trabalho3;

/**
 *
 * @author Ricardo
 */

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.*;
import javax.swing.event.AncestorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Interface extends JFrame implements ChangeListener
{

    protected Volume volume;
    private Color cor;
  //---------------------------------------(Radio)---------------------------------------//
    protected Musica radio2;
  //---------------------------------------(Relogio)-------------------------------------//
    protected Relogio digitalr;
 //-----------------------------------------(Threads)-----------------------------------//
    protected Thread t1;
    //private Thread t2;
 //------------------------------------------ Painel--------------------------------------//
    private JPanel pvolume;
    private JPanel pesquerdo;
    private JPanel pdireito;
    
 //-----------------------------------------Labels----------------------------------------//
    private JLabel lbvolume;
    private JLabel lbfreq;
    protected JLabel lbdigital;
    

 //-----------------------------------------Barra deslisante------------------------------//
    private JSlider slfreq;

//-----------------------------------------Volume----------------------------------------//
  private JSpinner spvolume;

//-----------------------------------------Janela----------------------------------------//
    JFrame radio;


    Interface()
    {
        JFrame.setDefaultLookAndFeelDecorated(true);
        radio = new JFrame();
        //cor = new Color(100,150,245);
        //cor = new Color(0,102,255);
       // radio.setBackground(cor);
        
        digitalr = new Relogio(this);
        //digitalr.run();

/**************************************(Threads)*******************************************/
       // t1 = new Thread();
       //t2 = new Thread(radio2);
        t1 = new Thread(digitalr);
       // t1.start();
        t1.start();
        
/**************************************(Volume)********************************************/
        spvolume = new JSpinner();
        spvolume.setModel(new SpinnerNumberModel(3,0,10,1));
        spvolume.addChangeListener(this);
        
/*****************************************(Estação)****************************************/
        slfreq = new JSlider(1,10,1);

        slfreq.setPaintTicks(true); //pintar os tick
        //slfreq.setSnapToTicks(true);
       // slfreq.setPaintLabels(true);
        //slfreq.setInverted(true); invete a sequencia das musicas
        slfreq.setMajorTickSpacing(10);
        slfreq.setMinorTickSpacing(1);
        slfreq.addChangeListener(this);
/**************************************(Painel)**********************************************************/
        pvolume = new JPanel(new GridLayout(2,2));
        pdireito = new JPanel();

/**************************************(Label)*********************************************************/
        lbvolume = new JLabel("Volume");
        lbfreq = new JLabel("Estação");
        lbdigital = new JLabel();

 /****************************************(Adicionando no Painel)*************************************/
        pvolume.add(lbfreq);pvolume.add(lbvolume);
        pvolume.add(slfreq);pvolume.add(spvolume);
        pdireito.add(lbdigital);

        //pvolume.setBackground(cor);
        //pdireito.setBackground(cor);
        //radio.setBackground(cor);
        //.setBackground(cor);


/**************************************(Configurações da Janela)****************************************/

        
   
        lbdigital.setFont(new Font("Comic Sans MS", Font.BOLD, 40));
        radio.add(pvolume,BorderLayout.SOUTH);
        radio.add(lbdigital,BorderLayout.EAST);
        radio.setTitle("                                                                                   Radio Relógio                                                                     ");
        radio.setSize(650,500);
        radio.setLocationRelativeTo(radio);
        radio.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        radio.setVisible(true);
    }

    public static void main(String args [])
    {
        //chamando o construtor
        new Interface();

    }
    public void stateChanged(ChangeEvent event)
{
JSlider slider = (JSlider)event.getSource();
int value = slider.getValue();

if(value==4)
{

        //String com o caminho do arquivo MP3 a ser tocado

        String path = "c:/musica1";

        //Instanciação de um objeto File com o arquivo MP3

        File mp3File = new File(path);

        //Instanciação do Objeto MP3, a qual criamos a classe.

       radio2 = new Musica(mp3File);

        //Finalmente a chamada do método que toca a música
        value=0;
        radio2.play();
                 
}

}

   
}