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change color JTable cells with getTableCellRendererComponent NOTHING HAPPENDS

I am trying to change the color of some cells in my JTable. I have tried to override getTableCellRendererComponent in a simple example, and it works nice. But when I do the same in my project nothing changes...
I have my JPanel with my JTable in a Box like this:
boxTable=Box.createHorizontalBox();
box2Table.add(boxTable);
//JTable
tablaContador = new JTable(datosContador,cabeceraContador);
//MODIF COLOR
tablaContador.setDefaultRenderer(Object.class, new ColorRenderer());
Doing:
System.out.println(tablaContador.getColumnClass(3));
I can know that the first parameter of setDefaultRenderer is Object.class
I don't know if the problem is here... i have only strings in the Table, but I have tried String.class and nothing happens
Then I modify some things of JTable's Cells:
tablaContador.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
boxTable.add(tablaContador);
//Align cells
for (int i=0; i<cabeceraContador.length;i++){
tablaContador.getColumnModel().getColumn(i).setCellRenderer(alinearCeldas);
}
//Modify cells' width
tablaContador.getColumnModel().getColumn(0).setMinWidth(150);
for (int i=1; i<cabeceraContador.length;i++){
tablaContador.getColumnModel().getColumn(i).setMaxWidth(40);
}
//Scroll for the Table
scrollContador=new JScrollPane(tablaContador,JScrollPane.VERTICAL_SCROLLBAR_NEVER,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scrollContador.setPreferredSize(new Dimension(1000,80));
scrollContador.setMinimumSize(new Dimension(1000,80));
scrollContador.setMaximumSize(new Dimension(2000,80));
//Add scroll to the box
box2Table.add(scrollContador);
And my ColorRenderer class is:
public class ColorRenderer extends DefaultTableCellRenderer{
private Component c;
#Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,int row, int column) {
c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
c.setBackground(Color.BLUE);
return c;
}
}
Table result
So It does not work in my project i don't know why
any idea?
thaks!

I see:
tablaContador.setDefaultRenderer(Object.class, new ColorRenderer());
and then I see:
for (int i=0; i<cabeceraContador.length;i++)
{
tablaContador.getColumnModel().getColumn(i).setCellRenderer(alinearCeldas);
}
The assignment of the renderer to a specific column takes precedence over setting the default renderer so your color renderer is never used.
Not exactly what you are trying to do, but I would guess you need to add the color rendering logic to the alignment renderer. In other words all the rendering logic must be contained in a single renderer. You can't merge multiple renderers.
Here is a simple example of a custom renderer:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableRenderer extends JPanel
{
public TableRenderer()
{
String[] columnNames = {"String", "Integer"};
Object[][] data =
{
{"A", new Integer(1)},
{"B", new Integer(2)},
{"C", new Integer(10)},
{"D", new Integer(4)}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable( model );
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
add( scrollPane );
// Override default renderer on a specific column
TableCellRenderer colorRenderer = new ColorRenderer();
table.getColumnModel().getColumn(1).setCellRenderer( colorRenderer );
}
/*
** Color the focused cell
*/
class ColorRenderer extends DefaultTableCellRenderer
{
public ColorRenderer()
{
super();
setHorizontalAlignment(JLabel.RIGHT);
}
#Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (isSelected)
setBackground( table.getSelectionBackground() );
else
{
setBackground( null );
try
{
int number = Integer.parseInt( value.toString() );
if (number > 9)
setBackground( Color.RED );
}
catch(Exception e) {}
}
return this;
}
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("Color Renderer");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TableRenderer());
frame.pack();
frame.setLocationByPlatform( true );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater( () -> createAndShowGUI() );
/*
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
*/
}
}

synchronize view of two JTable

I have two JTables one in main viewport and one in footer viewport, using JideScrollPane.
the problem is when the main JTable's view is customized, the footer JTable remains the
same, is there any way to synchronize their view?
thanks.

EDIT:
Here's a demo that will synch up the resizing of two tables that have similar columns. The idea is:
Create a custom TableColumnModelListener for each table's column model.
Upon resize, sync up the column widths. You'll have to disable the other listener temporarily, while this is happening.
For moving of columns, implement that logic in columnMoved(...) [left as an exercise]
This shows two-way synching:
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class JTableResizeColumnsDemo implements Runnable
{
JTable table1, table2;
TableColumnModelListener columnListener1, columnListener2;
Map<JTable, TableColumnModelListener> map;
public static void main(String[] args)
{
SwingUtilities.invokeLater(new JTableResizeColumnsDemo());
}
public void run()
{
Vector<String> names = new Vector<String>();
names.add("One");
names.add("Two");
names.add("Three");
table1 = new JTable(null, names);
table2 = new JTable(null, names);
columnListener1 = new ColumnChangeListener(table1, table2);
columnListener2 = new ColumnChangeListener(table2, table1);
table1.getColumnModel().addColumnModelListener(columnListener1);
table2.getColumnModel().addColumnModelListener(columnListener2);
map = new HashMap<JTable, TableColumnModelListener>();
map.put(table1, columnListener1);
map.put(table2, columnListener2);
JPanel p = new JPanel(new GridLayout(2,1));
p.add(new JScrollPane(table1));
p.add(new JScrollPane(table2));
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(p);
frame.setSize(300, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
class ColumnChangeListener implements TableColumnModelListener
{
JTable sourceTable;
JTable targetTable;
public ColumnChangeListener(JTable source, JTable target)
{
this.sourceTable = source;
this.targetTable = target;
}
public void columnAdded(TableColumnModelEvent e) {}
public void columnSelectionChanged(ListSelectionEvent e) {}
public void columnRemoved(TableColumnModelEvent e) {}
public void columnMoved(TableColumnModelEvent e) {}
public void columnMarginChanged(ChangeEvent e)
{
TableColumnModel sourceModel = sourceTable.getColumnModel();
TableColumnModel targetModel = targetTable.getColumnModel();
TableColumnModelListener listener = map.get(targetTable);
targetModel.removeColumnModelListener(listener);
for (int i = 0; i < sourceModel.getColumnCount(); i++)
{
targetModel.getColumn(i).setPreferredWidth(sourceModel.getColumn(i).getWidth());
}
targetModel.addColumnModelListener(listener);
}
}
}

You can apply an Observer pattern: the first JTable observes the second and vice versa. Then you add listners to both tables so that, when one is "customized", the other is notified. Basically, "being notified" consists in a method invocation that causes the update of the JTable.
In order to do that, you have two options:
You define a class Observer with a "register" method and a
"notify" method. When creating a JTable, you register it with the
Observer. Then, the listener you create and associate to each JTable
invoke the "notify" method of the observer, which informs all other
registered JTables of the change
You define a sort of "callback method" notify in the class that contains and declares the JTable. This "notify" method is invoked within the listner and updates the correct JTable. You can also create two methods: one for updating one JTable and one for the other JTable

Usually this is done by using the same model for different ui components. Sadly the JTable contains a bug that will cause problems when sharing the TableColumnModel.
But you can work around it using this JTable
class ShareableColumnModelTable extends JTable {
/**
* Fixes http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4816146 and
* more...
*
*/
#Override
public void columnMarginChanged(ChangeEvent e) {
if (isEditing()) {
removeEditor();
}
TableColumn resizingColumn = null;
if (tableHeader != null) {
resizingColumn = tableHeader.getResizingColumn();
}
if (resizingColumn != null) {
if (autoResizeMode == AUTO_RESIZE_OFF) {
resizingColumn.setPreferredWidth(resizingColumn.getWidth());
} else { // this else block is missing in jdk1.4 as compared to
// 1.3
TableColumnModel columnModel = getColumnModel();
/**
* Temporarily disconnects this column listener to prevent
* stackoverflows if the column model is shared between
* multiple JTables.
*/
columnModel.removeColumnModelListener(this);
try {
doLayout();
} finally {
columnModel.addColumnModelListener(this);
}
repaint();
return;
}
}
resizeAndRepaint();
}
}
With the ShareableColumnModelTableshowed above you can share one column model bettween multiple tables.
public static void main(String[] args) {
JFrame frame = new JFrame("Column Sync");
Container contentPane = frame.getContentPane();
JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
splitPane.setResizeWeight(0.5d);
contentPane.add(splitPane);
JTable table1 = new ShareableColumnModelTable();
JTable table2 = new ShareableColumnModelTable();
TableColumnModel tableColumnModel = createTableColumnModel();
table1.setModel(createTableModel1());
table2.setModel(createTableModel2());
table1.setColumnModel(tableColumnModel);
table2.setColumnModel(tableColumnModel);
splitPane.setLeftComponent(new JScrollPane(table1));
splitPane.setRightComponent(new JScrollPane(table2));
showFrame(frame);
}
private static TableColumnModel createTableColumnModel() {
TableColumnModel tableColumnModel = new DefaultTableColumnModel();
TableColumn column1 = new TableColumn(0);
column1.setHeaderValue("1. column");
tableColumnModel.addColumn(column1);
TableColumn column2 = new TableColumn(1);
column2.setHeaderValue("2. column");
tableColumnModel.addColumn(column2);
return tableColumnModel;
}
private static TableModel createTableModel1() {
DefaultTableModel tableModel = new DefaultTableModel();
tableModel.setColumnCount(2);
tableModel.addRow(new Object[] { "a", "b" });
return tableModel;
}
private static TableModel createTableModel2() {
DefaultTableModel tableModel = new DefaultTableModel();
tableModel.setColumnCount(2);
tableModel.addRow(new Object[] { "c", "d" });
return tableModel;
}
private static void showFrame(JFrame frame) {
frame.setSize(240, 400);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setVisible(true);
}

How add status image in default jTable java Netbeans

I have a jtable functioning normally. The table lists tasks, and each task you an associated status.
I want every status is associated with an image.
So the image would appear in the table as show below.
------Code for jTable----------
DefaultTableModel tmSubTask = new DefaultTableModel(null, new String[]{"Status", "Priority", "Task", "SubTask", "Desc", "Prevision Begin", "Time", "Prevision Duration", "Prevision hour", "Begin", "Hour Begin","End Date" ,"End Hour", "Duration"});
List<SubTask> subTask;
ListSelectionModel lsmSubTask;
Connection conexao = null;
PreparedStatement pst= null;
ResultSet rs = null;
private void showSubTask(List<SubTask> subTask) {
while (tmSubTask.getRowCount() > 0) {
tmSubTask.removeRow(0);
}
if (subTask.size() == 0) {
JOptionPane.showMessageDialog(null, "showSubTask");
} else {
String[] line = new String[]{null, null, null};
for (int i = 0; i < SubTask.size(); i++) {
tmSubTask.addRow(linha);
tmSubTask.setValueAt(subTask.get(i).getStatus(), i, 0);
tmSubTask.setValueAt(subTask.get(i).getIdPriority(), i, 1);
tmSubTask.setValueAt(subTask.get(i).getIdTask(), i, 2);
tmSubTask.setValueAt(subTask.get(i).getIdSubTask(), i, 3);
tmSubTask.setValueAt(subTask.get(i).getDescSubTask(), i, 4);
tmSubTask.setValueAt(subTask.get(i).getDateBegin(), i, 5);
tmSubTask.setValueAt(subTask.get(i).getTerm(), i, 6);
tmSubTask.setValueAt(subTask.get(i).getDuration(), i, 7);
tmSubTask.setValueAt(subTask.get(i).gethourBeginP(), i, 8);
tmSubTask.setValueAt(subTask.get(i).getDateBegin(), i, 9);
tmSubTask.setValueAt(subTask.get(i).getHourBegin(), i, 10);
tmSubTask.setValueAt(subTask.get(i).getDateEnd(), i, 11);
tmSubTask.setValueAt(subTask.get(i).getHourEnd(), i, 12);
tmSubTask.setValueAt(subTask.get(i).getDuration(), i, 13);
}
}
}
---------------jTable--------------
---------------What I want---------
Imagine if Status like Delay in jTable show image red.
I honestly don't even know where to start.
I apologize if I did not make myself clear.
Thank all any help you can give me.
Greetings.
Any questions I will try to explain as best as possible.

Add an ImageIcon to the table and override the getColumnClass(...) method of the JTable to return Icon.class and the table will use an appropriate renderer to display the Icon. Something like:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableIcon extends JFrame
{
public TableIcon()
{
Icon aboutIcon = new ImageIcon("about16.gif");
Icon addIcon = new ImageIcon("add16.gif");
Icon copyIcon = new ImageIcon("copy16.gif");
String[] columnNames = {"Picture", "Description"};
Object[][] data =
{
{aboutIcon, "About"},
{addIcon, "Add"},
{copyIcon, "Copy"},
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable( model )
{
// Returning the Class of each column will allow different
// renderers to be used based on Class
public Class getColumnClass(int column)
{
return getValueAt(0, column).getClass();
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
new TableRowResizer(table);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
TableColumnAdjuster tca = new TableColumnAdjuster(table);
tca.adjustColumns();
}
public static void main(String[] args)
{
TableIcon frame = new TableIcon();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}

Listening to many JTextFields and calculate value sum in a Row

I have an application that gets input from user;
it has 8 rows of JTextFields with 3 columns:
+-----------+-----------+-----------+
| Field 1-1 | Field 1-2 | Field 1-3 |
+-----------+-----------+-----------+
| Field 2-1 | Field 2-2 | Field 2-3 |
+-----------+-----------+-----------+
| Field 3-1 | Field 3-2 | Field 3-3 |
+-----------+-----------+-----------+
In each row while user changes first or second field the sum of new values must be written in third field.
For example when user changes Filed 1-1 & Field 1-2 sum of them must be calculated and shown in Field 1-3 and so on for other rows.
I wrote a Class that implements DocumentListener and and named it listenerClass & called .getDocument().addDocumentListener(new listenerClass) for all of JTextFields in column 1 & 2 ;
Now in listenerClass I need to know which JTextField called listenerClass to be able determine wich fields must be added and result must be written in which JTextField.
How Can I find out which JTextField called DocumentListener ?
Is there any better method to do this?
Thanks

You have two options here:
brute force: just one listener instance that will compute 8 sums and update 8 text fields
smart: pass to your listener class constructor 3 text fields and then instantiate a differente listener for each row

put a property with putClientProperty method on each JTextField. You can use that property as an id, and get it back inside the listener.
For example:
JTextField 1_1 = new JTextField();
1_1.putClientProperty("id", "1_1");
EDIT:
Sorry, I was forgetting that you don't have a reference to source object inside listener. SO it's better also do:
JTextField 1_1 = new JTextField();
1_1.getDocument.putProperty("source", 1_1);
the from inside the listener you can do:
public void insertUpdate(DocumentEvent documentEvent) {
//source
Object source = documentEvent.getDocument().getProperty("source");
if (source instanceof JTextField){
JTextField field = (JTextField)source;
String id = field.getClientProperty("id");
}
}
I asked a similar question some months ago: have a look here.

consider using JTable instead of plenty of JTextFields or JFormattedTextFields and listening by some of Listeners
from code
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableProcessing extends JFrame implements TableModelListener {
private static final long serialVersionUID = 1L;
private JTable table;
public TableProcessing() {
String[] columnNames = {"Item", "Quantity", "Price", "Cost"};
Object[][] data = {
{"Bread", new Integer(1), new Double(1.11), new Double(1.11)},
{"Milk", new Integer(1), new Double(2.22), new Double(2.22)},
{"Tea", new Integer(1), new Double(3.33), new Double(3.33)},
{"Cofee", new Integer(1), new Double(4.44), new Double(4.44)}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
model.addTableModelListener(this);
table = new JTable(model) {
private static final long serialVersionUID = 1L;
#Override
public Class getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
#Override
public boolean isCellEditable(int row, int column) {
int modelColumn = convertColumnIndexToModel(column);
return (modelColumn == 3) ? false : true;
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane(table);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.add(scrollPane);
frame.pack();
frame.setLocation(150, 150);
frame.setVisible(true);
}
#Override
public void tableChanged(TableModelEvent e) {
System.out.println(e.getSource());
if (e.getType() == TableModelEvent.UPDATE) {
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 1 || column == 2) {
TableModel model = table.getModel();
int quantity = ((Integer) model.getValueAt(row, 1)).intValue();
double price = ((Double) model.getValueAt(row, 2)).doubleValue();
Double value = new Double(quantity * price);
model.setValueAt(value, row, 3);
}
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
TableProcessing frame = new TableProcessing();
}
});
}
}

Use yourTextField.setName("Alice"), then in your DocumentListener implementation retrieve the name with with getName() and check for "Alice".
These methods belong to the java.awt.Component class. Every swing JComponent extends from it.

TableModelListener and multiple column validation

This is the first time for me to post here, so sorry if I made some mistake.
I am working on a JTable which column data have to verify some parameters, for example:
Column 3 values > 30
Column 4 values > 10
Column 5 values > 4
Also the first 2 columns are filled "automatically", putting 0s in the rest of the columns.
If that data is correct, in the Column 5 I would show an image of a tick, otherwise, I would show an image of a warning.
For verifying this I use the following code
ImageIcon accept = new javax.swing.ImageIcon(getClass().getResource("/resources/accept.png"));
ImageIcon deny = new javax.swing.ImageIcon(getClass().getResource("/resources/exclamation.png"));
public void tableChanged(TableModelEvent e) {
int row = e.getFirstRow();
double d1 = Double.valueOf(jTable.getValueAt(row, 2).toString());
double d2 = Double.valueOf(jT.getValueAt(row, 3).toString());
double d3 = Double.valueOf(jT.getValueAt(row, 4).toString());
if(d1>MAX_A||d2>MAX_B||d3>MAX_C){
jTable.setValueAt(deny, row, 5);
}
else{
jTable.setValueAt(accept, row, 5);
}
}
The problem of this code is that returns a Stack Overflow, and I don't know how to handle this.
Is there any other way to implement some verifier on a table that implies multiple cells?
Thanks in advance.

The problem of this code is that
returns a Stack Overflow, and I don't
know how to handle this.
The problem is that your code sets a value in the model listener so another tableChanged event is generated. Your code should be something like:
if (e.getColumn() != 5)
// do your code
I don't see a problem using a TableModelListener to dynamically set the value of a column based on data in another column. Here is a simple example:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class TableProcessing extends JPanel implements TableModelListener
{
public TableProcessing()
{
String[] columnNames = {"Item", "Quantity", "Price", "Cost"};
Object[][] data =
{
{"Bread", new Integer(1), new Double(1.11), new Double(1.11)},
{"Milk", new Integer(1), new Double(2.22), new Double(2.22)},
{"Tea", new Integer(1), new Double(3.33), new Double(3.33)},
{"Cofee", new Integer(1), new Double(4.44), new Double(4.44)}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames)
{
// Returning the Class of each column will allow different
// renderers to be used based on Class
#Override
public Class getColumnClass(int column)
{
return getValueAt(0, column).getClass();
}
// The Cost is not editable
#Override
public boolean isCellEditable(int row, int column)
{
return (column == 3) ? false : true;
}
};
model.addTableModelListener( this );
JTable table = new JTable( model );
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
add( scrollPane );
String[] items = { "Bread", "Milk", "Tea", "Coffee" };
JComboBox<String> editor = new JComboBox<String>( items );
DefaultCellEditor dce = new DefaultCellEditor( editor );
table.getColumnModel().getColumn(0).setCellEditor(dce);
}
/*
* The cost is recalculated whenever the quantity or price is changed
*/
public void tableChanged(TableModelEvent e)
{
if (e.getType() == TableModelEvent.UPDATE)
{
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 1 || column == 2)
{
TableModel model = (TableModel)e.getSource();
int quantity = ((Integer)model.getValueAt(row, 1)).intValue();
double price = ((Double)model.getValueAt(row, 2)).doubleValue();
Double value = new Double(quantity * price);
model.setValueAt(value, row, 3);
}
}
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("Table Model Listener");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TableProcessing());
frame.pack();
frame.setLocationByPlatform( true );
frame.setVisible( true );
}
public static void main(String[] args) throws Exception
{
EventQueue.invokeLater( () -> createAndShowGUI() );
/*
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
*/
}
}

You probably get your error because of getFirstRow call. I think it's a bad idea to validate table structure in JTable.tableChanged - how do you know that the table was fully filled and ready for validation? I would suggest filling the whole table first, then invokation of validation. Maybe there would be also a good idea to use separate table to display validation results