SwingWorker JDK6 ... "event" missing on EDT

Following strange behaviour I came accross, while I migrated from "classic"
SwingWorker to the new SwingWorker in JDK6.
A subclass of SwingWorker queries data from a server on the worker thread
and then sets JTable data in it's EDT method.
There ( at the end of the done() method) it calls directly
firePropertyChange("data123", null, null)
... and this "event" was never seen again with JDK6.
The properly registered PropertyChangeListener is simply nerver called.
No error message shown whatsoever.
It is reproducible.
Whereby other PropertyChangeListeners on the same component,
of which the "events" where also called direclty on EDT,
do get their callbacks, e.g.
firePropertyChange("rowinx", old, newrowinx);
is propagated correctly to the very same JTable component.
If I simply revert to extending "classic" SwingWorker in JDK6,
everyting works fine, as it did before under JDK5.
Did anyone observe similar strange behaviour with SwingWorker in JDK6?
Any advice on this?
Greetings,
Lophiomys
PS:
If I can put up some spare time, I'll try to create a simplified test case.

I don't have 1.6 source to hand but it sounds like the code is now checking that "oldValue" and "newValue" are the same and thus no event needs to be propagated, regardless of what that actual value is - ie without realising that nulls have specific meaning in this context. It's worth downloading the source code to double check this - or if anyone else has it to hand maybe they can look.
I've seen more than one bug appear on the database related to null property names and/or values in PropertyChangeEvents - seems there's some lack of clarity within Sun about the slightly unusual semantics of 'null' here (I seem to recall I've tripped over it myself, as well), so I wouldn't be surprised if this was a new bug.

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Version 11201
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AllYourDataBase wrote:
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i tried to create runnable in setvalueat method of my table model.iam new to threads.i might be doing something wrong.
here iam attaching same class that iam experimenting.
any help really appreciated.
i have deadline by friday
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.awt.geom.*;
import java.awt.Dimension;
import java.text.*;
import javax.swing.event.TableModelListener;
import javax.swing.event.TableModelEvent;
import javax.swing.table.*;
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private boolean DEBUG = true;
JTable table;
JLabel label=new JLabel();
public TableSorterDemo() {
super("TableSorterDemo");
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//TableSorter sorter = new TableSorter(myModel); //ADDED THIS
//JTable table = new JTable(myModel); //OLD
//JTable table = new JTable(sorter); //NEW
//table = new JTable(sorter);
table = new JTable();
table.setModel(myModel);
myModel.addTableModelListener(myModel);
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table.setSelectionMode(0);
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JScrollPane scrollPane = new JScrollPane(table);
//JLabel label=new JLabel();
label.setText("0");
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getContentPane().add(scrollPane, BorderLayout.CENTER);
getContentPane().add(label, BorderLayout.SOUTH);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
public void run(){
class MyTableModel extends AbstractTableModel implements TableModelListener {
final String[] columnNames = {"First Name",
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"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary", "Campione",
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{"Alison", "Huml",
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{"Kathy", "Walrath",
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{"Mark", "Andrews",
"Speed reading", "60", new Boolean(false)},
{"Angela", "Lih",
"Teaching high school", "10", new Boolean(false)}
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return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
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* JTable uses this method to determine the default renderer/
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public Class getColumnClass(int c) {
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public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
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return false;
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//System.out.println(e.getColumn());
//System.out.println(table.getValueAt(e.getFirstRow(),e.getColumn()));
* Don't need to implement this method unless your table's
* data can change.
public synchronized void setValueAt(Object value, int row, int col) {
/*if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
final int row1=row;
final int col=col1;
final String value1=value;
Runnable setSearchStatusLabel = new Runnable() {
public void run() {
AddSum(row1,col1,value1);
/*int labelval=StringToInt(label.getText());
int newlabelval;
int tablesumval;
if(value1.equalsIgnoreCase("true")){
tablesumval=StringToInt((String)(table.getValueAt(row1,col1-1)));
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newlabelval=labelval+tablesumval;
//String test=IntToCurrencyString(newlabelval);
label.setText(IntToString(newlabelval));
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tablesumval=StringToInt((String)(table.getValueAt(row1,col1-1)));
if(labelval==0){
newlabelval=tablesumval;
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newlabelval=labelval-tablesumval;
label.setText(IntToString(newlabelval));
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//With JFC/Swing 1.1 and JDK 1.2, we need to create
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//switches to contain Strings. Starting with v 1.3,
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try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
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data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
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printDebugData();
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int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
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TableSorterDemo frame = new TableSorterDemo();
frame.pack();
frame.setBounds(100,100,500,150);
frame.setVisible(true);
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     NumberFormat formatter = NumberFormat.getInstance();
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     return result;
private int StringToInt(String val) {
     NumberFormat formatter = NumberFormat.getInstance();
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          numberValue = formatter.parse(val);
     catch(ParseException e){};
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int labelval=StringToInt(label.getText());
int newlabelval;
int tablesumval;
if(value1.equalsIgnoreCase("true")){
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label.setText(IntToString(newlabelval));
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newlabelval=tablesumval;
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