Java/Swing JFC/ButtonGroup

Get selected button from ButtonGroup

   <source lang="java">

import java.awt.ruponent; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ButtonGroup; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JRadioButton; public class Main {

 public static void main(String[] args) {
   JFrame frame = new JFrame();
   JPanel entreePanel = new JPanel();
   final ButtonGroup entreeGroup = new ButtonGroup();
   JRadioButton radioButton;
   entreePanel.add(radioButton = new JRadioButton("A"));
   radioButton.setActionCommand("A");
   entreeGroup.add(radioButton);
   entreePanel.add(radioButton = new JRadioButton("B"));
   radioButton.setActionCommand("B");
   entreeGroup.add(radioButton);
   entreePanel.add(radioButton = new JRadioButton("C", true));
   radioButton.setActionCommand("C");
   entreeGroup.add(radioButton);
   final JPanel condimentsPanel = new JPanel();
   condimentsPanel.add(new JCheckBox("Ketchup"));
   condimentsPanel.add(new JCheckBox("Mustard"));
   condimentsPanel.add(new JCheckBox("Pickles"));
   JPanel orderPanel = new JPanel();
   JButton orderButton = new JButton("Place Order");
   orderPanel.add(orderButton);
   frame.setLayout(new GridLayout(3, 1));
   frame.add(entreePanel);
   frame.add(condimentsPanel);
   frame.add(orderPanel);
   orderButton.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent ae) {
       String entree = entreeGroup.getSelection().getActionCommand();
       System.out.println(entree + " sandwich");
       Component[] components = condimentsPanel.getComponents();
       for (Component c : components) {
         JCheckBox cb = (JCheckBox) c;
         if (cb.isSelected())
           System.out.println("With " + cb.getText());
       }
     }
   });
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setSize(300, 150);
   frame.setVisible(true);
 }

}

</source>