RadioButton Demo
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JRadioButtonMenuItem;
public class RadioButtonSample {
static Icon threeIcon = new ImageIcon("3.gif");
static Icon fourIcon = new ImageIcon("4.gif");
static Icon fiveIcon = new ImageIcon("5.gif");
static Icon sixIcon = new ImageIcon("6.gif");
public static void main(String args[]) {
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
AbstractButton aButton = (AbstractButton) actionEvent
.getSource();
boolean selected = aButton.getModel().isSelected();
System.out.println(actionEvent.getActionCommand()
+ " - selected? " + selected);
}
};
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
AbstractButton aButton = (AbstractButton) itemEvent.getSource();
int state = itemEvent.getStateChange();
String selected = ((state == ItemEvent.SELECTED) ? "selected"
: "not selected");
System.out.println(aButton.getText() + " - selected? "
+ selected);
}
};
JFrame frame = new JFrame("Radio Menu Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Menu");
ButtonGroup buttonGroup = new ButtonGroup();
menu.setMnemonic(KeyEvent.VK_M);
JRadioButtonMenuItem emptyMenuItem = new JRadioButtonMenuItem();
emptyMenuItem.setActionCommand("Empty");
emptyMenuItem.addActionListener(actionListener);
buttonGroup.add(emptyMenuItem);
menu.add(emptyMenuItem);
JRadioButtonMenuItem oneMenuItem = new JRadioButtonMenuItem("Partridge");
oneMenuItem.addActionListener(actionListener);
buttonGroup.add(oneMenuItem);
menu.add(oneMenuItem);
JRadioButtonMenuItem twoMenuItem = new JRadioButtonMenuItem(
"Turtle Doves", true);
twoMenuItem.addActionListener(actionListener);
buttonGroup.add(twoMenuItem);
menu.add(twoMenuItem);
JRadioButtonMenuItem threeMenuItem = new JRadioButtonMenuItem(
"French Hens", threeIcon);
threeMenuItem.addItemListener(itemListener);
buttonGroup.add(threeMenuItem);
menu.add(threeMenuItem);
JRadioButtonMenuItem fourMenuItem = new JRadioButtonMenuItem(
"Calling Birds", fourIcon, true);
fourMenuItem.addActionListener(actionListener);
buttonGroup.add(fourMenuItem);
menu.add(fourMenuItem);
JRadioButtonMenuItem fiveMenuItem = new JRadioButtonMenuItem(fiveIcon);
fiveMenuItem.addActionListener(actionListener);
fiveMenuItem.setActionCommand("Rings");
buttonGroup.add(fiveMenuItem);
menu.add(fiveMenuItem);
JRadioButtonMenuItem sixMenuItem = new JRadioButtonMenuItem(sixIcon,
true);
sixMenuItem.addActionListener(actionListener);
sixMenuItem.setActionCommand("Geese");
buttonGroup.add(sixMenuItem);
menu.add(sixMenuItem);
menuBar.add(menu);
frame.setJMenuBar(menuBar);
frame.setSize(350, 250);
frame.setVisible(true);
}
}
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