TwoButtons.java

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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");  
        MyDrawPanel2 drawPanel = new MyDrawPanel2();
        frame.add(colorButton, BorderLayout.SOUTH);  
        frame.add(drawPanel, BorderLayout.CENTER);  
        frame.add(labelButton, BorderLayout.WEST);  
        frame.add(label, BorderLayout.EAST);
        frame.setSize(500, 300);  
        frame.setVisible(true);
    }
 
    class LabelListener implements ActionListener {  
        public void actionPerformed(ActionEvent event) {
            label.setText("Ouch!");
        }
    } // close inner class
 
    class ColorListener implements ActionListener {  
        public void actionPerformed(ActionEvent event) {
            frame.repaint();
        }
    } // close inner class
}