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

    public class ObservateurRadio implements ActionListener
    {
    	private JPanel panneau;

    	public ObservateurRadio(JPanel panneau)
    	{
    		this.panneau = panneau;
    	}

    	@Override
    	public void actionPerformed(ActionEvent e)
    	{
    		String action = e.getActionCommand();

    		if (action == "CYAN")
    		{
    			panneau.setBackground(Color.CYAN);
    		}

    		else if (action == "MAGENTA")
    		{
    			panneau.setBackground(Color.MAGENTA);
    		}

    		else if (action == "YELLOW")
    		{
    			panneau.setBackground(Color.YELLOW);
    		}
    	}
    }