// Adapted from Bruce Eckel's "Thinking in Java", 3d Ed, Chapter 14

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

public class ButtonGroups1 extends JFrame {
    private static String[] ids = {
	"Tripp", "Trapp", "Trull",
    };

    public ButtonGroups1() {
	super("ButtonGroups");
	Container cp = getContentPane();
	cp.setLayout(new FlowLayout());

	ButtonGroup group = new ButtonGroup();
	JPanel panel = new JPanel();
	panel.setBorder(new TitledBorder("3 x JButton"));
	for (int i = 0; i < ids.length; i++) {
	    JButton button = new JButton(ids[i]);
	    group.add(button);
	    panel.add(button);
	}
	cp.add(panel);

	group = new ButtonGroup();
	panel = new JPanel();
	panel.setBorder(new TitledBorder("3 x JToggleButton"));
	for (int i = 0; i < ids.length; i++) {
	    JToggleButton button = new JToggleButton(ids[i]);
	    group.add(button);
	    panel.add(button);
	}
	cp.add(panel);

	group = new ButtonGroup();
	panel = new JPanel();
	panel.setBorder(new TitledBorder("3 x JCheckBox"));
	for (int i = 0; i < ids.length; i++) {
	    JCheckBox button = new JCheckBox(ids[i]);
	    group.add(button);
	    panel.add(button);
	}
	cp.add(panel);

	group = new ButtonGroup();
	panel = new JPanel();
	panel.setBorder(new TitledBorder("3 x JRadioButton"));
	for (int i = 0; i < ids.length; i++) {
	    JRadioButton button = new JRadioButton(ids[i]);
	    group.add(button);
	    panel.add(button);
	}
	cp.add(panel);
    }

    public static void main(String[] args) {
        ButtonGroups1 frame = new ButtonGroups1();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
} // class ButtonGroups1