RadioStreamer GUI class

package radiostreamer;

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javazoom.jl.decoder.JavaLayerException;
import static radiostreamer.RadioStreamer.radio;

/**
 *
 * @author Zerocchi
 */
public class GUI extends JFrame implements ActionListener {

    JFrame frame = new JFrame("Radio");
    JPanel pane = new JPanel();
    JButton listen = new JButton("Listen");
    JButton stop = new JButton("Stop");
    JComboBox radioList = new JComboBox(radio);

    @SuppressWarnings("LeakingThisInConstructor")
    GUI() {
        Container con = this.getContentPane();
        setLayout(new FlowLayout());
        setSize(450,100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        con.add(pane);
        pane.add(radioList);
        pane.add(listen);
        pane.add(stop);
        listen.addActionListener(this);
        stop.addActionListener(this);
        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent event) {
        try {
            Object source = event.getSource();
            String radioChoice = (String)radioList.getSelectedItem();
            Parser radioStream = new Parser(radioChoice);
            if(source == listen) {
                radioStream.playStream();
            }
            else if(source == stop) {
                radioStream.stopStream();
            }
        } catch (IOException | JavaLayerException ex) {
            Logger.getLogger(GUI.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}