Detecting JTable column changes

I'm extending the AbstractTableModel with my own and I'm using getColumnName(...) to draw the value from an array:
public String getColumnName(int col) {
return titles[col];
}My problem is that I want to allow column reordering but I don't know how to keep my titles[] array in sync with the changes (which is important in other areas of the program).
Can anyone point me in the right direction?

Jtable always messages the tableModel's setValueAt in the model coordinates - as are all calls from the JTable to the model, JTable converts them internally. There is no need to track the view coordinates (they are handled exclusively at the view level).
If you have to do some backend update in the tableModel based on the columnNames in some particular column just do so in the the setValueAt(...) of the model, roughly like:
class MyTableModel extends WhateverTableModel {
public void setValueAt(...) {
super.setValueAt(..);
doBackendUpdate(value, row, getColumnName(column));
}Greetings
Jeanette

Similar Messages

How to change JTable column header text

How do you set the text in the JTable column headers? I know you can create a JTable specifying the text in an array:
<li>JTable(Object[][] rowData, Object[] columnNames)
But if you create the JTable specifying a TableModel,
<li>JTable(TableModel dm)
the header text defaults to "A", "B", "C", etc. I cannot figure out how to access the text in the header names so it can be changed to something useful. I know how to get the JTableHeader for the table, but it does not seem to have methods for actually setting header values.

I'm sure that model allows you to specify header values so you don't have to do so manually. I would be very surprised if it didn't override the default getColumnName() method to provide a reasonable names.She wasn't writing the class, but [url http://forums.oracle.com/forums/thread.jspa?messageID=9200751#9200751]outlining a design for me to implement. And, based on a previous comment I had made, I think she assumed I wanted the new design to look as much like the old as possible. There were no headers in the original design, which wasn't even a table.
Anyway, this works:
    final static String statisticsColumnNames[] = {
     "Type", "Count",
     "Red QE", "Green QE", "Blue QE", "Average QE",
     "Distance"
     qErrors = new QEBeanTableModel();
     JTable errorTable = new JTable(qErrors);
     TableColumnModel tcm = errorTable.getColumnModel();
     for (int col = 0; col < statisticsColumnNames.length; col++)
         tcm.getColumn(col).setHeaderValue(statisticsColumnNames[col]);
It looks like setHeaderValue() on the TableColumn is what I was looking for.Again, only used if you are dynamically changing the values at run time or you don't like the defaults provided by the Bean-aware model.I coded the above before I read your last post. The QEBeanTableModel is extremely specific to my program. I.e. I cannot imagine it being used anywhere else. Would it still be better to implement a getColumnName() within the table model? Looking at your [url http://www.camick.com/java/source/RowTableModel.java]RowTableModel.java source, I can see that it would not be difficult to do so.
Just decided to add the getColumnName() method. This whole sub-project is based on implementing a clean modern design (and learning about Java Beans). You've clearly stated twice that the method I have implemented is for dynamic header values only, which has already answered what I asked last paragraph.

Detecting clicked column in JTable (with JCheckBox in column)

I am struggling with something that seems like it should be so simple, but it doesn't work as I expect;
I have a table with 5 columns, the 5th column is a CheckBox. What I need to do is detect when the 5th column changes, ie. the check box is clicked;
If I use a MouseListener on the table, and derive the table from the event, the column that I get back from getSelectedColumn() is -1, which is not conclusive. I assume this is because clicking the check box is not actually selecting the column.
I implemented a TableModelListener as follow;
tableModel.addTableModelListener(new TableModelListener()
public void tableChanged(TableModelEvent e)
System.out.println("Changed Column is " + e.getColumn() + " " + e.getFirstRow());
This seems to do the same as before, and gives a first row of 0 and selected column of -1. Once again inconclusive.
The cell as I say is rendered as a JCheckBox, the data in the table model obviously being Boolean.
Can anyone suggest how I can determine if my column with a Check Box in has been clicked, and if so, which Row? (I have thought about overriding JCheckBox, but this seems more work than necessary)
Thanks in anticipation

You need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html]
that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on
the information provided.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting] so the posted code retains its original formatting.

(simple q) how do I change the font in a JTable column header? thanks

how do I change the font in a JTable column header?
thanks

JTableHeader header = yourTable.getTableHeader();
// Set to serif, bold, size 12...
header.setFont( new java.awt.Font( "serif", 1, 12 ) );
// you can set others like color and border, too.
header.setBackground(Color.white);
header.setBorder( new EmptyBorder(15,2,15,2) );

JTable Column Header Problem, Please help me

What Listener I have to used to get the column index when user change the width of column header using mouse.

There is no listener that reports this activity. The TableColumnModelListener can only tell you if columns change position or are added/removed from the column model.
To detect changes, you will need to use a brute force mechanism, namely, to extend the JTableHeader class just a bit.
When the user clicks on a header to resize a column, there is a property in JTableHeader called ResizingColumn that has a type of TableColumn. It is set by the UI delegate when the drag operation starts to the column being resized. When the drag operation ends, the value of ResizingColumn is set to null. You might start with something like this:
JTable table = new JTable(...);
MyTableHeader header = new MyTableHeader();
table.setHeader(header);
table.setModel(...);
class MyTableHeader extends JTableHeader
    public void setResizingColumn(TableColumn column)
        super.setResizingColumn(column);
        if (column != null)
            System.out.println("Resizing Column #" + column.getModelIndex());
        else
            System.out.println("Resizing Ended");
}This will only work for user resizing of columns, not for sizes changed programmatically or by the automatic sizing features of the header.
Mitch Goldstein
Author, Hardcore JFC (Cambridge Univ Press)
[email protected]

How to catch selected text in JTable Column

Hi there,
I am learning JTable. Need help for How to get the selected text from the JTable Column which is set to be editable.
for example in JTextFiled you have method on getSelectedText(), is there any method for tracking the selected text.
Thanks in advance
Minal

Here's an example of the model I used in my JTable. Not the "getValueAt" method & "getRecordAt" method. You will have to have a Record object - but it only contains the attributes of an inserted record (with appropriate getters & setters). Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
public boolean isCellEditable(int rowIndex, int columnIndex)
// The 2nd & 3rd column or Value field is editable
if(isEditable)
if(columnIndex > 0)
return true;
return false;
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
* Retrieves number of columns
public synchronized int getColumnCount()
return NUM_COLUMNS;
* Get a column name
public String getColumnName(int col)
return columnNames[col];
* Retrieves number of records
public synchronized int getRowCount()
if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
* Clears all records
public synchronized void clear()
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.removeAllElements();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS)
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
* Loads the values into the combo box within the table for mail id
public void setUpMailColumn(JTable mapTable, ArrayList mailList)
TableColumn col = mapTable.getColumnModel().getColumn(1);
javax.swing.JComboBox comboMail = new javax.swing.JComboBox();
int s = mailList.size();
for(int i=0; i<s; i++)
comboMail.addItem(mailList.get(i));
col.setCellEditor(new DefaultCellEditor(comboMail));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for mail Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Mail Id to see a list of choices");
* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
for(int i=0; i<s; i++)
combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
}

Resize JTable Columns without Column Header

Hi all.
I have a JTable that doesn't display a column header.
I would like to allow the user to resize the columns by dragging a mouse at the column edges at any point down the table.
It is not obvious how I can accomplish this.
Does anyone have any ideas?
Thanks, Paul.

That doesn't work, though, since the table has its own listenersIt's not just that. The header's mouse listeners work with instance fields of BasicTableHeaderUI and detection (using e.getPoint) of the header cell and column.
I would start with copying the entire code of BasicTableHeaderUI to a class of my own, then first eliminate anything that obviously isn't related to column dragging/resizing, then refactor, refactor, refactor to make the listener codes work with a table instead of a header. But like I said, easier said than done, particularly when having to deal with the various JTable column resize modes.
db

Can Jtable column preferences be preserved?

Hi,
I re-ordered my JTable columns and removed/added a few. However, this gets overwritten as soon as I perform another search. Can column preferences be preserved for for a particular user?
Thanks,
Samba.

Yes.
You can register a TableColumnModelListener with your tables TableColumnModel and save the changes to a file in the users home directory.
When restoring you can change the tables TableColumnModel using the stored values (before registering the Listener).
bye
TPD

How to set JTable column's color?

How can I set JTable Columns' color? I only found this class DefaultTableCellRenderer
which can set cell's color.

rmalina wrote:
You are going to need to derive a renderer class for your Column from DefaultTableCellRenderer and override the following function with something like this:
@Override
public Component getTableCellRendererComponent(JTable jTable, Object oValue, boolean isSelected, boolean hasFocus, int nRow, int nColumn) {
super.setForeground(Color.GREEN);
super.setBackground(Color.GREEN);
}That would set your column to green.
Edited by: rmalina on Jul 28, 2008 8:47 AMHow can I know I only change the columns' color instead of other cells?

Help with JTable column width

Hi,
I'm trying to resize my JTable columns with this code, but it's not working. What I am doing wrong?
for (int i = 0; i < table.getColumnModel().getColumnCount(); i++) {
TableColumn tc = table.getColumnModel().getColumn(i);
int width = (i == 0)? 10 : table.getWidth()/2 - 10; // three columns
tc.setPreferredWidth(width);
Thanks,
Andr�

Now my problem is that using either of these methods
is they don't carry the user's selected column width
through updates.It sounds like the change event your table model is firing is causing the entire table to be rebuilt. I would guess that you are firing fireTableStructureChanged() which would cause the entire table to be rebuilt (columns, cell values, etc.) Just fire a change event for the minimum necessary. If you can't identify what data in your table has changed (to fire cell or row change events), but the structure (columns) of the table hasn't changed, just fire fireTableDataChanged(). This will cause the cells to be redrawn with the new values, but shouldn't cause the columns to be rebuilt and resized.

Multi-colored JTable column heading? How?

Hi,
I'm looking for a way to have JTable column heading text
that can be displayed in multiple colors, so one string
in one column header, might have each letter a different
color.
My application requires highlighting some of the letters
of a word as red, while others are normal text (black).
I've been using multi-line strings to simulate vertical
naming for my column header, for example:
PPP
I I I
N N N
1 2 3
for PIN1, PIN2, PIN3. The column data has a binary
one or zero for each pin, grouped together in one JTable
column. In my application, if there is an error, I want to
color just the text representing, say PIN2 red and leave
the surrounding PIN1 and PIN3 black.
What approach should I take for doing this with JTable?
Thanks!
John Roberts
[email protected]

You should override the default cell renderer used by Java
- JTable.getTableHeader().setDefaultRenderer(yourRenderer)
Extend yourRenderer from JLabel and use HTML tags to change the color.
- setText on JLabel with the HTML code like "<HTML> <BODY> <FONT COLOR="red"> A </FONT> <FONT COLOR="green"> B </FONT></BODY> </HTML>"

How Can I set up a JTable columns?

Dear All,
How can I set up my JTable columns to have the amount the user specifies?
for example when the user types in 50 in JTextField 1 I want the JTables columns to then set to 50.
How can this be done?
Thanks
lol
import javax.swing.*;
import javax.swing.table.TableModel;
import java.io.*;
import java.util.*;
import java.lang.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class si1 extends javax.swing.JFrame implements ActionListener {
    JTextField name = new JTextField(15);
    JTextField name1 = new JTextField(15);
    public si1() {
        super("DataBase Loader");
        setSize(1025,740);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel pane = new JPanel();
        JPanel pane1 = new JPanel();
        JPanel pane2 = new JPanel();
        JPanel pane3 = new JPanel();
        JPanel pane4 = new JPanel();
        pane.setLayout(new GridLayout(20,1));
        pane1.setLayout(new BorderLayout());
        int j=10;
        String[][] data = new String[j][2];
        for (int k=0; k<j; k++){
           String[] row = {"",""};
           data[k] = row;
        String[] columnNames = {"First Name", "Last Name"};
        JTable perstab = new JTable(data, columnNames);
        perstab.setGridColor(Color.yellow);
        perstab.setPreferredScrollableViewportSize(new Dimension(500,500));
        JScrollPane scrollPane = new JScrollPane(perstab);
        pane1.add(new JPanel(), BorderLayout.EAST);
        JButton btn = new JButton("What are the names?");
        btn.addActionListener(this);
        btn.putClientProperty("DATABASE", perstab);
        pane1.add(new JPanel().add(btn), BorderLayout.SOUTH);
        pane2.add(name);
        pane3.add(name1);
        pane.add(pane2);
        pane.add(pane3);
        pane1.add(pane, BorderLayout.WEST);
        pane4.add(scrollPane);
        pane1.add(pane4, BorderLayout.CENTER);
        setContentPane(pane1);
        show();
    public static void main(String[] args) {
        si1 frame = new si1();
        frame.setVisible(true);
    public void actionPerformed(ActionEvent e) {
        JTable table = (JTable)((JButton)e.getSource()).getClientProperty("DATABASE");
        TableModel model = table.getModel();
        int count = model.getRowCount();
        String[] firstnames = new String[count];
        String[] lastnames = new String[count];
        for (int i=0; i < count; i++) {
           firstnames[i] = (String)model.getValueAt(i, 0);
            System.out.println("first name at row " + i + ": " + firstnames);
lastnames[i] = (String)model.getValueAt(i, 1);
System.out.println("lastname name at row " + i + ": " + lastnames[i]);

As you can see I have tried this, but no success.
If I am doing something wrong please accept my apology, and address me in the right direction.
Thanks
Lol
import javax.swing.*;
import javax.swing.table.TableModel;
import java.io.*;
import java.util.*;
import java.lang.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class si1 extends javax.swing.JFrame implements ActionListener {
    JTextField name = new JTextField(15);
    JTextField name1 = new JTextField(15);
    public si1() {
        super("DataBase Loader");
        setSize(1025,740);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel pane = new JPanel();
        JPanel pane1 = new JPanel();
        JPanel pane2 = new JPanel();
        JPanel pane3 = new JPanel();
        JPanel pane4 = new JPanel();
        pane.setLayout(new GridLayout(20,1));
        pane1.setLayout(new BorderLayout());
        int j=10;
        String[][] data = new String[j][2];
        for (int k=0; k<j; k++){
           String[] row = {"",""};
           data[k] = row;
        String[] columnNames = {"First Name", "Last Name"};
        JTable perstab = new JTable(data, columnNames);
     ((DefaultTableModel)perstab.getModel()).setColumnCount(Integer.parseInt(name.getText()));
        perstab.setGridColor(Color.yellow);
        perstab.setPreferredScrollableViewportSize(new Dimension(500,500));
        JScrollPane scrollPane = new JScrollPane(perstab);
        pane1.add(new JPanel(), BorderLayout.EAST);
        JButton btn = new JButton("What are the names?");
        btn.addActionListener(this);
        btn.putClientProperty("DATABASE", perstab);
        pane1.add(new JPanel().add(btn), BorderLayout.SOUTH);
        pane2.add(name);
        pane3.add(name1);
        pane.add(pane2);
        pane.add(pane3);
        pane1.add(pane, BorderLayout.WEST);
        pane4.add(scrollPane);
        pane1.add(pane4, BorderLayout.CENTER);
        setContentPane(pane1);
        show();
    public static void main(String[] args) {
        si1 frame = new si1();
        frame.setVisible(true);
    public void actionPerformed(ActionEvent e) {
        JTable table = (JTable)((JButton)e.getSource()).getClientProperty("DATABASE");
        TableModel model = table.getModel();
        int count = model.getRowCount();
        String[] firstnames = new String[count];
        String[] lastnames = new String[count];
        for (int i=0; i < count; i++) {
           firstnames[i] = (String)model.getValueAt(i, 0);
            System.out.println("first name at row " + i + ": " + firstnames);
lastnames[i] = (String)model.getValueAt(i, 1);
System.out.println("lastname name at row " + i + ": " + lastnames[i]);

F2 key not working with custom JTable Column

I have a custom JTable Column (which is a JPanel with a JTextfield and JButton). Everything works as expected, except when the user presses "F2" to start editing the custom column cell. When the user presses F2, the custom cell goes into editing mode, but I am unable to type anything in it.
Below is the SSCCE.
Steps to Reproduce problem:
1) Run the Program
2) Select any cell in first Column.
3) Press "F2" and try to type into the cell. Can't type anything.
package com.ns;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.EventObject;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
public class TextButtonCellFrame extends javax.swing.JFrame {
    // Variables declaration - do not modify
    private JTextField inputText;
    private JScrollPane jScrollPane1;
    private JPanel testPanel;
    private JTable testTable;
    // End of variables declaration
    public TextButtonCellFrame() {
        initComponents();
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        testPanel = new JPanel();
        jScrollPane1 = new JScrollPane();
        testTable = new JTable();
        inputText = new JTextField();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        testTable.setModel(new DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
        testTable.setCellSelectionEnabled(true);
        testTable.setRowHeight(52);
        testTable.setSurrendersFocusOnKeystroke(true);
        testTable.getColumnModel().getColumn(0).setCellRenderer(new MyTableCellRenderer());
        testTable.getColumnModel().getColumn(0).setCellEditor(new MyTableCellEditor(new JTextField()));
        testTable.getColumnModel().getColumn(0).setPreferredWidth(200);
        jScrollPane1.setViewportView(testTable);
        testPanel.add(jScrollPane1);
        inputText.setPreferredSize(new Dimension(50, 20));
        testPanel.add(inputText);
        getContentPane().add(testPanel, BorderLayout.CENTER);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-576)/2, (screenSize.height-417)/2, 576, 417);
    }// </editor-fold>
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TextButtonCellFrame().setVisible(true);
    public class MyTableCellRenderer extends JPanel implements TableCellRenderer {
        Point point;
        JButton button1 = new JButton("Test 1");
        JTextField txtField = new JTextField();
        public MyTableCellRenderer() {
            setLayout(new BorderLayout());
            this.add(button1, BorderLayout.EAST);
            this.add(txtField,BorderLayout.CENTER);
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex) {
            if (isSelected) {
                txtField.setBackground(testTable.getSelectionBackground());
                txtField.setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
            else {
                txtField.setBackground(testTable.getBackground());
                txtField.setBorder(null);
            return this;
    public class MyTableCellEditor extends DefaultCellEditor {
        JPanel panel = new JPanel();
        JButton button1 = new JButton ("Test 1");
        JTextField txtField;
        MyTableCellEditor(JTextField txtField) {
            super (txtField);
            this.txtField = txtField;
            panel.setLayout(new BorderLayout());
            panel.add(button1, BorderLayout.EAST);
            panel.add(txtField,BorderLayout.CENTER);
        public void actionPerformed(ActionEvent e) {
            if (e.getSource() == button1)
                JOptionPane.showMessageDialog(null, "Action One Successful");
        public Component getTableCellEditorComponent(JTable table, Object value,
                                    boolean isSelected, int row, int column) {
            return panel;
       public boolean isCellEditable(final EventObject anEvent) {
          if (anEvent instanceof KeyEvent) {
             final KeyEvent keyEvent = (KeyEvent) anEvent;
             SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                   if (!Character.isIdentifierIgnorable(keyEvent.getKeyChar())) {
                      txtField.setText(txtField.getText() + keyEvent.getKeyChar());
                   txtField.setCaretPosition(txtField.getText().length());
                   txtField.requestFocusInWindow();
            return super.isCellEditable(anEvent);
}The code for isCellEditable(final EventObject anEvent) which is needed to edit the cell using keyboard was provided by DarrylBurke here
regards,
nirvan.

The F2 key when pressed generates an action event (either JTable generates it or some other component). I am not sure how to handle the action event in the isCellEditable() method. Also, F(X) range of keys other than F2 dump some junk character in the JTextfield when pressed. I am now stuck at this point and don't know how handle F(X) range of keys.
regards,
nirvan.

How To Search For a Text In JTable Column?

hi there
i want to search for specific text in a JTable Column
And If The Text Exists Highlits it?
any ideas or useful links or tutorials?

Well, then that would be a Swing related question. Did you search the Swing forum to see how rendering works.

How to change the column heading as the column changes

dear memebrs,
Take an example fo the table EMP. I need to create a report whose parameters are the table column names. so depending on the parameter(which is the column name) the report o/p changes.
so i am dynamically selecting the table column names and getting the o/p. The problem is when the column changes the heading of it in the report o/p is not changing.
we have to use format trigger for this, but i am not sure what code should we write in the format trigger of the boiler plate text of the column heading , such that it changes in accordance with the input which is nothing but column name.
for ex: If i choose EMPNO as the parameter then my column heading should become Employee Number and so on.......
your comments are welcomed
regards
sandeep

you can use a formula column of datatype character and of any width needed instead of a boilerplate text for the heading name.
In the formula column you can write code like below
IF :P_COLUMN_NAME = EMPNO THEN
return('Employee Number');
ELSIF :P_COLUMN_NAME = SAL THEN
return('Salary');
END IF;
where P_COLUMN_NAME the name of the column selected dynamically(i.e. the parameter).

Detecting JTable column changes

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