Implement group of buttons in an application
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
public class Main {
public static void main(String[] args) {
JRadioButton choice1, choice2, choice3;
choice1 = new JRadioButton("A");
choice1.setActionCommand("A");
choice2 = new JRadioButton("B");
choice2.setActionCommand("B");
choice3 = new JRadioButton("C");
choice3.setActionCommand("C");
final ButtonGroup group = new ButtonGroup();
group.add(choice1);
group.add(choice2);
group.add(choice3);
class VoteActionListener implements ActionListener {
public void actionPerformed(ActionEvent ev) {
System.out.println(group.getSelection().getActionCommand());
}
}
ActionListener alisten = new VoteActionListener();
choice1.addActionListener(alisten);
choice2.addActionListener(alisten);
choice3.addActionListener(alisten);
ItemListener ilisten = new VoteItemListener();
choice1.addItemListener(ilisten);
choice2.addItemListener(ilisten);
choice3.addItemListener(ilisten);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container c = frame.getContentPane();
c.setLayout(new GridLayout(0, 1));
c.add(choice1);
c.add(choice2);
c.add(choice3);
frame.pack();
frame.setVisible(true);
}
}
class VoteItemListener implements ItemListener {
public void itemStateChanged(ItemEvent ev) {
boolean selected = (ev.getStateChange() == ItemEvent.SELECTED);
AbstractButton button = (AbstractButton) ev.getItemSelectable();
System.out.println(selected + ", Selection: "
+ button.getActionCommand());
}
}
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