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

/**
   The BagelPanel class allows the user to select either
   a white or whole wheat bagel.
*/

public class BagelPanel extends JPanel
{
   // The following constants are used to indicate
   // the cost of each type of bagel.
   public final double WHITE_BAGEL = 1.25;
   public final double WHEAT_BAGEL = 1.50;

   private JRadioButton whiteBagel;  // To select white
   private JRadioButton wheatBagel;  // To select wheat
   private ButtonGroup bg;           // Radio button group

   /**
      Constructor
   */

   public BagelPanel()
   {
      // Create a GridLayout manager with 
      // two rows and one column.
      setLayout(new GridLayout(2, 1));

      // Create the radio buttons.
      whiteBagel = new JRadioButton("White", true);
      wheatBagel = new JRadioButton("Wheat");

      // Group the radio buttons.
      bg = new ButtonGroup();
      bg.add(whiteBagel);
      bg.add(wheatBagel);

      // Add a border around the panel.
      setBorder(BorderFactory.createTitledBorder("Bagel"));

      // Add the radio buttons to the panel.
      add(whiteBagel);
      add(wheatBagel);
   }

   /**
      getBagelCost method
      @return The cost of the selected bagel.
   */

   public double getBagelCost()
   {
      double bagelCost = 0.0;

      if (whiteBagel.isSelected())
         bagelCost = WHITE_BAGEL;
      else
         bagelCost = WHEAT_BAGEL;

      return bagelCost;
   }
}