Unselecting RadioButtons in Java Swing

Question

When displaying a group of JRadioButtons, initially none of them is selected (unless you programmatically enforce that). I would like to be able to put buttons back into tha

Answer 1

The Javadoc of the class ButtonGroup itself gives some hint about how this can be achieved:

From the API doc of class ButtonGroup:
Initially, all buttons in the group are unselected. Once any button is selected, one button is always selected in the group.There is no way to turn a button programmatically to "off", in order to clear the button group. To give the appearance of "none selected", add an invisible radio button to the group and then programmatically select that button to turn off all the displayed radio buttons.

Answer 2

You can use setselected(false) method to unselect the previous selected button.

Answer 3

I don't know if this will help but have you tried to use doClick() method?

jRadioButtonYourObject.doClick();

Input - NONE

Return- void

I had a similar problem and tried everything in this thread to no avail. So I took a look at all the methods of JRadioButton and found that method from JRadioButton's parent class.

In my program, I had two radio button independent of each other and it was programed so that only one was selected.

After the user enters data and hits a button the program clears all text fields and areas and deselects the radio button. The doClick() did the job of deselecting the radio button for me; the method "performs a "click"."

I know yours is different and you probably would have to program the doClick() method for every radio button that is selected.

http://docs.oracle.com/javase/7/docs/api/javax/swing/AbstractButton.html

search for doClick()

Answer 4

Use this helper class SelectButtonGroup.java direct link to the class source

import java.awt.*;
import java.awt.event.ActionListener;
import javax.swing.*;

public class SelectUnselected extends JPanel {
    private static String birdString = "Bird";
    private static String catString = "Cat";
    private static Integer selectedIndex = -1;
    private static AbstractButton hiddenButton = new JRadioButton(catString);
    private final static AbstractButton birdButton = new JRadioButton(birdString);
    private final static AbstractButton catButton = new JRadioButton(catString);
    //Group the radio buttons.
    private SelectButtonGroup group = new SelectButtonGroup();

public SelectUnselected() {
    super(new BorderLayout());

    //Create the radio buttons.
    hiddenButton.setVisible(false);
    hiddenButton.setSelected(true);

    group.add(birdButton);
    group.add(catButton);
    group.add(hiddenButton);


    ActionListener sendListener = e -> {
        checkSelectedRadioButten();
    };
    birdButton.addActionListener(sendListener);
    catButton.addActionListener(sendListener);
    hiddenButton.addActionListener(sendListener);



    //Put the radio buttons in a column in a panel.
    JPanel radioPanel = new JPanel(new GridLayout(0, 1));
    radioPanel.add(birdButton);
    radioPanel.add(catButton);

    add(radioPanel, BorderLayout.LINE_START);
    setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
}

public void checkSelectedRadioButten(){

    System.out.println("selectedIndex = " + selectedIndex + "\ngroup.getSelectedButton() = " + group.getSelectedIndex());
    if(group.getSelectedIndex() == selectedIndex){
        hiddenButton.setSelected(true);
        selectedIndex = -1;
        System.out.println("getText = " + group.getSelectedButton().getText());
    }else{
        selectedIndex = group.getSelectedIndex();
        System.out.println("getText = " + group.getSelectedButton().getText());
    }
}

public static void main(String[] args) {
    JFrame frame = new JFrame("RadioButtonDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JComponent newContentPane = new SelectUnselected();
    frame.setContentPane(newContentPane);
    frame.pack();
    frame.setVisible(true);

    }
}

Answer 5

You can do buttonGroup.clearSelection().

But this method is available only since Java 6.

Answer 6

Try adding a third invisible button to the button group. When you want to "deselect", select the invisible one.