model for group of radio buttons

[sudheer kiran]

hi all,

i have a set of radio buttons. what is the class which represents model for set of radio buttons.
how can i get a selected radio button from a group.
i am expecting one like a DefaultComboBoxModel for combo boxes.
please let me know if any is available.

[Rob Spoor]

You need ButtonGroup to make the radio buttons work together. That class doesn't have a method to get the selected radio button though, only the ButtonModel of the selected button. You'll need to check each of the radio buttons to see which one isSelected(). Storing them in an array may help you.

[sudheer kiran]

thanks for the reply.
i have one more question.
we set objects to combox so that when call getSelected i will get object.
but i case of radio buttons i can't set a object to it ,i can set only string value am i right?

[Campbell Ritchie]

Have you been through the JRadioButton constructors? There doesn't appear to be one taking Object as a parameter type. You could try an Action, as Rob shows in this old thread.

[Jerry Goldsmith]

Here are a couple of snippets of button group code. Hope this helps.

    String[] choices = {"A", "B", "C"};
    String[] commands = {"Open", "Close", "Wait"};

//
//
//

        final int numButtons = choices.length;
        JRadioButton[] radioButtons = new JRadioButton[numButtons];
        final ButtonGroup group = new ButtonGroup();

        for (int i = 0; i < numButtons; i++) {
            radioButtons[i] = new JRadioButton(choices[i]);
            radioButtons[i].setActionCommand(commands[i]);
            group.add(radioButtons[i]);
        }

[Campbell Ritchie]

I hope you are not using the action command in a big bank of if-elses.

I am not certain, because I haven't seen all your code, but I am not convinced that "open" and "close" are suitable for radio buttons. I would have thought that is more appropriate for an ordinary button.

[Jerry Goldsmith]

I'm simply displaying the actionCommand string in a message window opened by the action listener.

[Campbell Ritchie]

That sounds better.