import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
 
public class MyFrame extends JFrame implements ActionListener {
 
    Button button = new Button("Push me!");
 
    public MyFrame() {
 
        super("MyFrame");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(200, 100);
        button.addActionListener(this);
	getContentPane().setLayout(new BorderLayout());
	getContentPane().add("Center", button);
        setVisible(true);
    }
 
    public final void actionPerformed(ActionEvent e) {
 
        if (e.getActionCommand().equals(button.getActionCommand())) {
            JOptionPane.showMessageDialog(this, "Hey, you pushed me!", "Button says: ", JOptionPane.PLAIN_MESSAGE);
        }
    }
 
    public static void main(String[] args) {
 
        MyFrame mf = new MyFrame();
    }
}