How to run ActionListenters in two different thread for the following code...

The ActionListeners here are not running concurrently...
    import java.io.*;    
    import javax.swing.*;
    import java.awt.event.*;
    import javazoom.jl.player.Player;  
    import java.io.FileInputStream;



        public class Play2 extends JFrame
        {  
        JButton b,b1;
        JTextField t;

        Play2()
        {
            JFrame j=new JFrame("MusicPlayer");
            j.setSize(300,300);
            j.setDefaultCloseOperation(EXIT_ON_CLOSE);
            b=new JButton("Play");
            b1=new JButton("Stop");
            JPanel p=new JPanel();
            t=new JTextField(20);
            p.add(t);
            p.add(b);
            p.add(b1);
            j.add(p);
            /**try {
                j.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("jesus.jpg")))));
                } 
            catch (IOException e) {
                e.printStackTrace();
                }
            j.getContentPane().setOpaque(false);*/
            j.setVisible(true);


        }
        public void awt()
        {
        b.addActionListener(
                new ActionListener(){
                      public void actionPerformed(ActionEvent ae){
                    try  
                        {  

                String fname=t.getText();
                File directory = new File(fname);

                boolean isDirectory = directory.isDirectory();

                if (isDirectory) 
                 {
                        // It returns true if directory is a directory.
                    System.out.println("the name you have entered is a directory  : "  +  directory);  
                        //It returns the absolutepath of a directory.
                        System.out.println("the path is "  +  directory.getAbsolutePath());
                 }
                else
                {
                        // It returns false if directory is a file.
                    System.out.println("the name you have entered is a file  : " + directory);
                        //It returns the absolute path of a file.
                        System.out.println("the path is "  + directory.getAbsolutePath());
                }
                    String s=directory.getAbsolutePath();

                    s=s.replace("\\","/") ;

                        FileInputStream fis=new FileInputStream(s);  
                        final Player playMp3=new Player(fis);  

                        playMp3.play(); 
            }
            catch(Exception e){
                System.out.println(e);}
            }//end actionPerformed
          }//end ActionListener
        );//end addActionListener()

        b1.addActionListener(
          new ActionListener(){
            public void actionPerformed(
                                      ActionEvent ae){
              //Terminate playback before EOF
                        try  
                        {  

                String fname=t.getText();
                File directory = new File(fname);

                boolean isDirectory = directory.isDirectory();

                if (isDirectory) 
                 {
                        // It returns true if directory is a directory.
                    System.out.println("the name you have entered is a directory  : "  +  directory);  
                        //It returns the absolutepath of a directory.
                        System.out.println("the path is "  +  directory.getAbsolutePath());
                 }
                else
                {
                        // It returns false if directory is a file.
                    System.out.println("the name you have entered is a file  : " + directory);
                        //It returns the absolute path of a file.
                        System.out.println("the path is "  + directory.getAbsolutePath());
                }
                    String s=directory.getAbsolutePath();

                    s=s.replace("\\","/") ;

                        FileInputStream fis=new FileInputStream(s);  
                        final Player playMp3=new Player(fis);  

                        playMp3.close(); 
            }
            catch(Exception e){
                System.out.println(e);}
            }//end actionPerformed
          }//end ActionListener
        );//end addActionListener()

        }


            public static void main(String[]args)  
            {  
            Play2 f=new Play2();
            f.awt();    
        }

    }