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From "Dmitry Irlyanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4658) [classlib][swing][compartibility] The order of ItemStateChanged events in buttonGroup is differs from RI
Date Tue, 21 Aug 2007 12:23:30 GMT
[classlib][swing][compartibility] The order of ItemStateChanged events in buttonGroup is differs
from RI
--------------------------------------------------------------------------------------------------------

                 Key: HARMONY-4658
                 URL: https://issues.apache.org/jira/browse/HARMONY-4658
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Dmitry Irlyanov


The order of itemStateChanged events is fifferent for RI and for our implementation. It isn't
a bug because the behavior is unspecified, but some applications may rely on this issue

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;

public class Test {

    public static void main(String[] args) {

        ButtonGroup group = new ButtonGroup();

        JRadioButton b1 = new JRadioButton("First");
        JRadioButton b2 = new JRadioButton("Second");
        group.add(b1);
        group.add(b2);
        b1.setSelected(true);

        ItemListener buttonListener = new ItemListener() {

            public void itemStateChanged(ItemEvent e) {

                AbstractButton rb = (AbstractButton) e.getSource();
                System.err.println(rb.getText() + " state changed");

            }

        };

        b1.addItemListener(buttonListener);
        b2.addItemListener(buttonListener);

        b2.setSelected(true);
        b1.setSelected(true);
        b2.setSelected(true);
        b1.setSelected(true);
    }

}


Output:
RI:
First state changed
Second state changed
Second state changed
First state changed
First state changed
Second state changed
Second state changed
First state changed

Harmony: 
Second state changed
First state changed
First state changed
Second state changed
Second state changed
First state changed
First state changed
Second state changed

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