Name: jk109818 Date: 10/24/2002


FULL PRODUCT VERSION :
[alex@meat alex]$ java -version
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)


FULL OPERATING SYSTEM VERSION :

[alex@meat alex]$ rpm -query glibc
glibc-2.2.4-30
[alex@meat alex]$ uname -a
Linux meat 2.4.7-10 #1 Thu Sep 6 16:46:36 EDT 2001 i686 unknown
)
[alex@meat alex]$ cat /etc/*release
Red Hat Linux release 7.2 (Enigma)

ADDITIONAL OPERATING SYSTEMS :

All

A DESCRIPTION OF THE PROBLEM :
A JavaBean should fire a PropertyChange event when any of
its properties change.

JTextField has a property named "text", as signified by its
getText and setText methods.

When a client of JTextField calls its setText() method, the
text is changed, but the PropertyChange event is not fired.

The Swing source code demonstrates that JTextField delegates
its text to the document; however, it really should conform
to the standard for JavaBeans. Developers can waste time
needlessly looking for the workaround, and it also means
that using JTextFields in JavaBean-aware builders will not
function properly.





STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
see source code

EXPECTED VERSUS ACTUAL BEHAVIOR :
expected: print property change event
actual: nothing happens

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.beans.*;

public class TextFieldBug {
    public static void main(String[] args)
    {
        JTextField text = new JTextField();
        text.addPropertyChangeListener(new PropertyChangeListener()
        {
            public void propertyChange(PropertyChangeEvent evt)
            {
                System.out.println("Received Event=" + evt);
            }
        });
        text.setText("something");
    }
}

---------- END SOURCE ----------

CUSTOMER WORKAROUND :
Use the textField's document's DocumentListener instead:

        textField.getDocument().addDocumentListener(new
DocumentListener() {
            public void insertUpdate(DocumentEvent e) {
                update();
            }

            public void removeUpdate(DocumentEvent e) {
                update();
            }

            public void changedUpdate(DocumentEvent e) {
                update();
            }
        });
(Review ID: 166214)
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