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

class TerminationListener implements WindowListener {
    public void windowActivated(WindowEvent e) {}
    public void windowClosed(WindowEvent e) {}
    public void windowClosing(WindowEvent e) {
        System.exit(0) ;
    }
    public void windowDeactivated(WindowEvent e) {}
    public void windowDeiconified(WindowEvent e) {}
    public void windowIconified(WindowEvent e) {}
    public void windowOpened(WindowEvent e) {}
}

class CheckBoxPanel extends JPanel implements ActionListener {
    public CheckBoxPanel() {
        redButton = new JCheckBox("Red", false) ;
        add(redButton) ;

        redButton.addActionListener(this) ;
    }

    public void actionPerformed(ActionEvent evt) {
        if(redButton.isSelected())
            setBackground(Color.red) ;
        else
            setBackground(defaultColor) ;

        repaint() ;
    }

    private JCheckBox redButton ;
    private Color defaultColor = getBackground() ;
}

public class CheckBoxTest {
    public static void main(String [] args) {
        
        JFrame frame = new JFrame() ;

        frame.setTitle("CheckBoxTest") ;
        frame.setSize(450, 300) ;

        frame.addWindowListener(new TerminationListener()) ;

        frame.getContentPane().add(new CheckBoxPanel()) ;

        frame.setVisible(true) ;
    }
}