java.lang.Error: Unresolved compilation problems

I'm having a bit of trouble with this code...any ideas?

:confused:

Code:

---

[B]BuggyButtonTest.java[/B]
package homenetwork.bkr.training;

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

public class BuggyButtonTest {
        public static void main(String[] args)
        {
                EventQueue.invokeLater(new Runnable()
                {
                        public void run()
                        {
                                BuggyButtonFrame frame = new BuggyButtonFrame();
                                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                                frame.setVisible(true);
                        }
                });
        }
}


[B]BuggyButtonFrame.java[/B]
package homenetwork.bkr.training;

public class BuggyButtonFrame extends JFrame {
        public BuggyButtonFrame()
        {
                setTitle("Buggy Button Test");
                setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
               
                //add panel to the frame
                BuggyButtonPanel panel = new BuggyButtonPanel();
                add(panel);
        }
       
        public static final int DEFAULT_WIDTH = 300;
        public static final int DEFAULT_HEIGHT = 200;

}


[B]BuggyButtonPanel.java[/B]
package homenetwork.bkr.training;

import java.awt.event.ActionEvent;

import javax.swing.JButton;

public class BuggyButtonPanel extends JPanel {
       
        public BuggyButtonPanel()
        {
                ActionListener listener = new ButtonListener();
               
                JButton yellowButton = new JButton("Yellow");
                add(yellowButton);
                yellowButton.addActionListener(listener);
               
                JButton blueButton = new JButton("Blue");
                add(blueButton);
                blueButton.addActionListener(listener);
               
                JButton redButton = new JButton("Red");
                add(redButton);
                redButton.addActionListener(listener);
        }

}

private class ButtonListener implements ActionListener
{
        public void actionPerformed(ActionEvent event)
        {
                String arg = event.getActionCommand();
                if (arg.equals("yellow")) setBackground(Color.yellow);
                else if (arg.equals("blue")) setBackground(Color.blue);
                else if (arg.equals("red")) setBackground(Color.red);
        }
}

---

Errors:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The method setDefaultCloseOperation(int) is undefined for the type BuggyButtonFrame
The method setVisible(boolean) is undefined for the type BuggyButtonFrame

at homenetwork.bkr.training.BuggyButtonTest.main(Bugg yButtonTest.java:15)