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

public class ButtonTest {
    JCheckBox r1, r2, r3;
    ButtonGroup g;
    JFrame f;

    ButtonTest () {
        r1= new JCheckBox("R1");
        r2= new JCheckBox("R2");
        r3= new JCheckBox("R3");
        r1.setActionCommand("r1");
        r2.setActionCommand("r2");
        r3.setActionCommand("r3");
        g=new ArabTeamButtonGroup();
        f=new JFrame();
        g.add(r1);
        g.add(r2);
        g.add(r3);
        f.getContentPane().add(r1);
        f.getContentPane().add(r2);
        f.getContentPane().add(r3);
        f.getContentPane().setLayout(new java.awt.GridLayout(3,1));
        f.pack();
        f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        ButtonTest test = new ButtonTest();
    }
}