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

public class MonBouton extends JButton {
    int nclick = 0;

    public MonBouton() {
	addActionListener(new ActionListener() {
	 	public void actionPerformed(ActionEvent e) {
		    nclick++;
		    ((JButton) e.getSource()).setText(Integer.toString(nclick));
		}
	    });
	setText("0");
    }

   
    public static void main(String [] args) {
	JFrame f = new JFrame();
	f.addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {
		System.exit(0);
	    }
	});
 	f.setContentPane(new MonBouton());
	f.pack();
	f.setVisible(true);
    }
}