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

public class ButtonAppEvents extends JFrame {
    JButton  b;
    JTextField t;
    MyActionListener al;
    public ButtonAppEvents(String name) {
	super(name);
	t = new JTextField(5);
	b = new JButton("Cuenta");
	al = new MyActionListener(t);
	b.addActionListener(al);
	Container cp = getContentPane();
	cp.setLayout(new FlowLayout());
	cp.add(b);
	cp.add(t);
    }
    public static void main(String[] args) {
	JFrame frame = new ButtonAppEvents("Button Events");
	frame.addWindowListener(
				new WindowAdapter() {
					public void windowClosing(WindowEvent e){
					    System.exit(0);
					}
				    });
	
	frame.setSize(400,100);
	frame.setVisible(true);
    }  
}

class MyActionListener implements ActionListener 
{ 
    int count;
    JTextField _t; 

    public MyActionListener (JTextField t) 
    {
	count=0;
	_t = t;
    }
    
    public void actionPerformed(ActionEvent e){
	_t.setText(" "+count++);
    }
}