[JAVA] Player MP3

[al3000]

salve ho creato questo semplice player ma non riesco a metterlo in pausa, elenco di seguito il codice:

package player;
import javax.media.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.File;
import java.awt.*;
import java.awt.event.*;
public class Main{
    public static void main(String[] args){
        PL p=new PL();
        p.setSize(300,300);
        p.setVisible(true);
        p.pack();
    }
}
class PL extends Frame implements ActionListener,ChangeListener,WindowListener{
    private JButton Play,Stop,Muto,Open;
    private Panel p1,p;
    private PlayerThread pt;
    private boolean statoMute;
    private File aperto;
    private JSlider slider;
    private static final int VOL_MIN=0;
    private static final int VOL_INIT=50;
    private static final int VOL_MAX=100;
    public PL(){
        super("Audio Player");
        p=new Panel();
        aperto=null;
        slider=new JSlider(JSlider.HORIZONTAL,VOL_MIN,VOL_MAX,VOL_INIT);
        p.add(new Label("Audio Player"));
        p1=new Panel();
        Play=new JButton("Play");
        Stop=new JButton("Stop");
        Open=new JButton("^");
        Play.addActionListener(this);
        Stop.addActionListener(this);
        Open.addActionListener(this);
        slider.addChangeListener(this);
        addWindowListener(this);
        Muto=new JButton("Mute");
        Muto.addActionListener(this);
        setLayout(new GridLayout(2,1));
        p1.add(Open);
        p1.add(Play);
        p1.add(Stop);
        p1.add(slider);
        p1.add(Muto);
        pt=null;
        statoMute=false;
        add(p);
        add(p1);
    }
    public void actionPerformed(ActionEvent e) {
        String nomeBottone=e.getActionCommand();
        if(nomeBottone.equals("^"))
           aperto=OpenFile();
        if(nomeBottone.equals("Play")){
            if(aperto!=null){
                pt.playerPause();
            }
            else{
                aperto=OpenFile();
                pt=new PlayerThread(aperto);
                pt.start();
            }
            
        }
        if(nomeBottone.equals("Stop")&&pt!=null){
            pt.playerStop();
        }            
        if(nomeBottone.equals("Mute")){
            statoMute=!statoMute;
            pt.playerMute(statoMute);
        }
    }
    public File OpenFile(){
        FileDialog fd=new FileDialog(this,"File",FileDialog.LOAD);
        fd.setVisible(true);
        File f = new File (fd.getDirectory(), fd.getFile());
        fd.dispose();
        return f;
    }

    public void stateChanged(ChangeEvent e) {
        JSlider source = (JSlider)e.getSource();
        pt.playerVolume((float)source.getValue());
    }
    public void windowOpened(WindowEvent e) {}
    public void windowClosing(WindowEvent e) {
        pt.playerStop();
        System.exit(0);
    }
    public void windowClosed(WindowEvent e) {}
    public void windowIconified(WindowEvent e) {}
    public void windowDeiconified(WindowEvent e) {}
    public void windowActivated(WindowEvent e) {}
    public void windowDeactivated(WindowEvent e) {}
}
class PlayerThread extends Thread{
    private Player p;
    private File file;
    PlayerThread(File file){
        this.file=file;
        p=null;
    }
    void playerStart(){
        try {
            p = Manager.createPlayer(file.toURL());
            p.start();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    void playerPause(){
        try{
            if(playerState())
                synchronized(p){
                    p.wait();
                }
            else
                synchronized(p){
                    p.notifyAll();
                }
        }
        catch(Exception ex){
            ex.printStackTrace();
        }
    }
    boolean playerState(){
        if(p.getState()==600)
            return true;
        else
            return false;
    }
    void playerStop(){
        p.stop();
        p.close();
    }
    void playerMute(boolean stato){
        p.getGainControl().setMute(stato);
    }
    void playerVolume(float level){
        p.getGainControl().setLevel(level/100);
    }
    public void run(){
        playerStart();
    }
}

se si preme il tasto play dopo che il player é partito l'intero programma si blocca ma la riproduzione continua.
potete aiutarmi ?

[al3000]

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