Toggle Buttons - The Definitive Guide to Java Swing - page 139

Listing 5-7. Radio Button Group Sample
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Enumeration;
public class GroupActionRadio {
private static final String sliceOptions[] =
{"4 slices", "8 slices", "12 slices", "16 slices"};
private static final String crustOptions[] =
{"Sicilian", "Thin Crust", "Thick Crust", "Stuffed Crust"};
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("Grouping Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Slice Parts
ActionListener sliceActionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
AbstractButton aButton = (AbstractButton)actionEvent.getSource();
System.out.println("Selected: " + aButton.getText());
}
};
Container sliceContainer =
RadioButtonUtils.createRadioButtonGrouping(sliceOptions,
"Slice Count", sliceActionListener);
// Crust Parts
ActionListener crustActionListener = new ActionListener() {
String lastSelected;
public void actionPerformed(ActionEvent actionEvent) {
AbstractButton aButton = (AbstractButton)actionEvent.getSource();
String label = aButton.getText();
String msgStart;
if (label.equals(lastSelected)) {
msgStart = "Reselected: ";
} else {
msgStart = "Selected: ";
}
lastSelected = label;
System.out.println(msgStart + label);
}
};