[Ch14] ActionListeners that can't change the frame

import javax.swing.*;

import java.awt.event.*;

class MyGui implements ActionListener {

  private JButton colorButton;

  private JButton labelButton;

class MyGui {

  private JFrame frame;

  private JLabel label;

  // declare a bunch of instance variables here

  public void go() {

    // build gui

    colorButton = new JButton();

    labelButton = new JButton();

    colorButton.addActionListener(this);

    labelButton.addActionListener(this);

    // more gui code here ...

  void gui() {

    // code to instantiate the two listeners and register one

    // with the color button and the other with the label button

  }

}

class ColorButtonListener implements ActionListener {

  public void actionPerformed(ActionEvent event) {

    if (event.getSource() == colorButton) {

      frame.repaint();

    } else {

      label.setText("That hurt!");

//    frame.repaint();

  }

}

class LabelButtonListener implements ActionListener {

  public void actionPerformed(ActionEvent event) {

//    label.setText("That hurt!");

  }

}