Set action command for JRadioButton in Java

//w ww.  j a  va 2s. co m

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;

public class Main {
  
  public static void main(String[] args) {
    JRadioButton choice1, choice2, choice3;
    choice1 = new JRadioButton("A");
    choice1.setActionCommand("A");
    choice2 = new JRadioButton("B");
    choice2.setActionCommand("B");
    choice3 = new JRadioButton("C");
    choice3.setActionCommand("C");

    final ButtonGroup group = new ButtonGroup();
    group.add(choice1);
    group.add(choice2);
    group.add(choice3);

    class VoteActionListener implements ActionListener {
      public void actionPerformed(ActionEvent ev) {
        System.out.println(group.getSelection().getActionCommand());
      }
    }
    
    ActionListener alisten = new VoteActionListener();
    choice1.addActionListener(alisten);
    choice2.addActionListener(alisten);
    choice3.addActionListener(alisten);

    ItemListener ilisten = new VoteItemListener();
    choice1.addItemListener(ilisten);
    choice2.addItemListener(ilisten);
    choice3.addItemListener(ilisten);

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container c = frame.getContentPane();
    c.setLayout(new GridLayout(0, 1));
    c.add(choice1);
    c.add(choice2);
    c.add(choice3);
    frame.pack();
    frame.setVisible(true);
  }
}


class VoteItemListener implements ItemListener {
  public void itemStateChanged(ItemEvent ev) {
    boolean selected = (ev.getStateChange() == ItemEvent.SELECTED);
    AbstractButton button = (AbstractButton) ev.getItemSelectable();
    System.out.println(selected + ", Selection: "
        + button.getActionCommand());
  }
}