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

public class TwoButtons {

  JFrame frame;
  JLabel label;

  public static void main(String[] args) {
    
    TwoButtons gui = new TwoButtons();
    gui.go();
  }

  public void go() {

    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JButton labelButton = new JButton("Change Label");
    labelButton.addActionListener(new LabelListener());

    JButton colorButton = new JButton("Change Circle");
    colorButton.addActionListener(new ColorListener());

    label = new JLabel("I'm a label");
    MyDrawPanel drawPanel = new MyDrawPanel();

    frame.getContentPane().add(BorderLayout.SOUTH, colorButton);
    frame.getContentPane().add(BorderLayout.CENTER, drawPanel);
    frame.getContentPane().add(BorderLayout.EAST, labelButton);
    frame.getContentPane().add(BorderLayout.WEST, label);

    frame.setSize(400,400);
    frame.setVisible(true);
  }

  class LabelListener implements ActionListener {
    public void actionPerformed(ActionEvent event) {
      label.setText("Ouch!");
    }
  }

  class ColorListener implements ActionListener {
    public void actionPerformed(ActionEvent event) {
      frame.repaint();
    }
  }
}