java - How do I get which JRadioButton is selected from a ButtonGroup

Question

I have a swing application that includes radio buttons on a form. I have the ButtonGroup, however, looking at the available methods, I can't seem to get the name of the selected JRadioButton. Here's what I can tell so far:

• From ButtonGroup, I can perform a getSelection() to return the ButtonModel. From there, I can perform a getActionCommand, but that doesn't seem to always work. I tried different tests and got unpredictable results.

• Also from ButtonGroup, I can get an Enumeration from getElements(). However, then I would have to loop through each button just to check and see if it is the one selected.

Is there an easier way to find out which button has been selected? I'm programing this in Java 1.3.1 and Swing.

Answer 1

I got similar problem and solved with this:

import java.util.Enumeration;
import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;

public class GroupButtonUtils {

    public String getSelectedButtonText(ButtonGroup buttonGroup) {
        for (Enumeration<AbstractButton> buttons = buttonGroup.getElements(); buttons.hasMoreElements();) {
            AbstractButton button = buttons.nextElement();

            if (button.isSelected()) {
                return button.getText();
            }
        }

        return null;
    }
}

It returns the text of the selected button.