How to show that JRadio button is selected and deselected?

Question

I have 5 JRadio buttons on my swing application. When I click my Jradio button. I have created a joption dialogue to display that it is clicked. But when I unselect it it also displays that it is selected. What is the problem? One of my Jradio button coding.

      private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) 
{
      JOptionPane.showMessageDialog(null,"one is selected");
}

So I finally got answer

with help of @Neil Locketz

     private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) 
     {
        if(jRadioButton1.isSelected())
          {
            JOptionPane.showMessageDialog(null,"one is selected");
          }
     }

Thanks

With that piece of code, it is hard to tell what is going on. — Dan D., Jan 31 '13 at 13:32

score 2 · Answer 1 · edited May 23 '17 at 12:12

2

not possible directly, have to wrap, delay this event for showing a JOptionPane inside invokeLater()
this is Bug for Java6 versions 6924233 : JOptionPane inside JCheckBox itemListener causes setSelected(false)
more in my (similair???) question

edited May 23 '17 at 12:12

Community

1
1

answered Jan 31 '13 at 13:38

mKorbel

109,525
20
134
319

+1 for digging up the issue. Though, it isn't virulent here because the OP is using an ActionListener, not an ItemListener. On the other hand: that's only coincidental - as there's no guarantee on listener notification sequence. So another (virtual :-) +1 for carefully thinking of invokeLater! – kleopatra Jan 31 '13 at 14:01

score 1 · Accepted Answer · answered Jan 31 '13 at 13:32

1

You need a reference to the JRadioButton Object so you can call button.isSelected() this will return a boolean of whether or not the button that you are testing is selected.

answered Jan 31 '13 at 13:32

Neil Locketz

4,228
1
23
34

score 0 · Answer 3 · 2013-01-31T13:44:05.230

Keep in mind this is totally pseudo-code

     JRadioButton testButton1=new JRadioButton("button1");
     JRadioButton testButton2=new JRadioButton("button2");

     ButtonGroup btngroup=new ButtonGroup();  

     btngroup.add(testButton1);  
     btngroup.add(testButton2);  

     boolean test;

     foreach(JRadioButton b in btngroup){
        test = b.isSelected();
        if(test)
           JOptionPane.showMessageDialog(null, b.getValue() + "is selected");
     }

score 0 · Answer 4 · answered Jan 31 '13 at 13:38

I suggest you create one single ActionListener instance and add it to all your buttons. Something like this:

ButtonGroup group = new ButtonGroup();
JRadioButton radio = new JRadioButton("1");
JRadioButton radio2 = new JRadioButton("2");
JRadioButton radio3 = new JRadioButton("3");
group.add(radio);
group.add(radio2);
group.add(radio3);
ActionListener a = new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        JRadioButton source = (JRadioButton) e.getSource();
        System.out.println(source.getText() + " selected " + source.isSelected());
    }
};
radio.addActionListener(a);
radio2.addActionListener(a);
radio3.addActionListener(a);

How to show that JRadio button is selected and deselected?

4 Answers4