Java Swing Passing Radio button value

1)Frame1.java:

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

public class Frame1{
  public static void main(String[] args){
    Frame1 sr = new Frame1();
  }

  public Frame1(){
    JFrame frame = new JFrame("Radio button selection");
    JRadioButton first = new JRadioButton("First");
    JRadioButton second = new JRadioButton("Second");

    JPanel panel = new JPanel();
    panel.add(first);
    panel.add(second);

    ButtonGroup bg = new ButtonGroup();
    bg.add(first);
    bg.add(second);

    first.addActionListener(new MyAction());
    second.addActionListener(new MyAction());

    frame.add(panel, BorderLayout.NORTH);
    frame.pack();
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

  public class MyAction implements ActionListener{
    public void actionPerformed(ActionEvent e){
      Frame2 f=new Frame2(e.getActionCommand());
      f.setVisible(true);

      }
  }
}

2)Frame2.java:

import javax.swing.*;
import java.awt.event.*;
class Frame2 extends JFrame
{
    Frame2(final String value)
    {
    setTitle("Frame2");
    JButton b=new JButton("Get selected button on third frame");
    add(b);
    setVisible(true);
    pack();
    b.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        new Frame3(value);
        }
    });
    }
}

3)Frame3.java:

import javax.swing.*;
class Frame3 extends JFrame
{
    public Frame3(String value){
    setTitle("Frame3");
    add(new JLabel("You have selected: "+value+" radio button"));
    setVisible(true);
    pack();
    }
}