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

public class ButtonListener implements ActionListener {

    ButtonListener() {}

    public void actionPerformed( ActionEvent e ) {

	System.out.println( e.getActionCommand().toString() );
    }

    public static void main( String [] args ) {

	ButtonListener bl = new ButtonListener();

	JButton redButton = new JButton( "button 1" );
	redButton.setActionCommand( "11111" );
	redButton.addActionListener( bl );

        JFrame frame = new JFrame();

	frame.getContentPane().add( redButton );
	
        frame.pack();
        frame.requestFocus();
        frame.setVisible(true);
    }

}