action listener help?

import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;

public class sound extends JFrame implements ActionListener {
    public sound() {
        //makes the frame
        setTitle("Click it!");
        setSize(200, 200);
        setResizable(false);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        //get content pane
        Container contentPane = getContentPane();
        contentPane.setLayout(null);
        //make the button
        JButton button = new JButton("Click me!");
        button.setBounds(50, 50, 100, 50);
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                public void run() {
                    JOptionPane.showMessageDialog(null, "It works!");
                }
            }
        });
        contentPane.add( button );
    }

    public static void main (String [] args) {
        sound frame = new sound();
        frame.setVisible(true);
    }
}