Java Swing How to - Handle to JRadioButton Events with an ActionListener

Question

We would like to know how to handle to JRadioButton Events with an ActionListener.

Answer

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/*from www. j a  va  2 s.c o  m*/
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Grouping Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel panel = new JPanel(new GridLayout(0, 1));

    ButtonGroup group = new ButtonGroup();
    JRadioButton aRadioButton = new JRadioButton("A");
    JRadioButton bRadioButton = new JRadioButton("B");

    ActionListener sliceActionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        AbstractButton aButton = (AbstractButton) actionEvent.getSource();
        System.out.println("Selected: " + aButton.getText());
      }
    };

    panel.add(aRadioButton);
    group.add(aRadioButton);
    panel.add(bRadioButton);
    group.add(bRadioButton);

    aRadioButton.addActionListener(sliceActionListener);
    bRadioButton.addActionListener(sliceActionListener);


    frame.add(panel);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}