Editable(false) on a column in a JTable. how to?

how can I set a column named Total, in a JTable to not be editable?
thanks
ameal from sv�rje

Hai Ameel,
check the following thread,
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=704416
Hope this helps,
Regards,
Ciya.

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How to disable/enable the cells for editing column wise in JTable in java?

Hi All,
Can any one tell me how to disable the cells for editing by column wise in JTable?
Here depending upon the radio button selected, I need 2 disable some columns for editing
and enable some columns for editing?
how can I do tat using JAVA?
Any sample code is of great help to me.
Thanks in Advance

http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
~

How to fix the value of first column in the JTable in java swing for every

Hi ,
I have a swing page that have table panel in which there is a table of size 7x4 now when I click on the perticulat row then that row data will displayin the table like that the selected row become the second column in the new table and the fist column of this table will remain constant for all the entry but the second column update according to the roe which is selected .How it is possible .
Thanks in Advace,
anu

One thing you can do is to prevent the user from editing that column and programatically supply the values of that column yourself.
JTable table = new JTable() {
   public boolean isCellEditable(int row, int col) {
       if(col == 0) {
          return false;
       return super.isCellEditable(row, col);
};This allows you to prevent the user from editing the column information so you can supply some sort of a default value for the column always
ICE

Help for adjusting columns of a JTAble in a Table Model

Hello community,
In order to have a good display of by DataBase in a JTable, I've wrote some code to adjust columns in function of datas. Those datas are displayed with a TableModel ( which I've declared in a class JDBCAdapter ).
When I start my application, I call adjustColumns(), and all is great but when I add information to my DB and display it, the columns of my JTable return to default width...
So I want to incorporate my function adjustColumns in my TableModel, and I need help...
     void adjustColumns()
     // Ajuste les colonnes aux donnes pour que tout soit visible
     int nbRow,nbCol;
     nbRow = JTable1.getRowCount();
     nbCol = test.getColumnCount();
     for ( int i = 0; i < nbCol; i++ )
     com.sun.java.swing.table.TableColumn column = null;
     column = JTable1.getColumnModel().getColumn(i);
     int dataLength = 0;
     for ( int j = 0; j< nbRow; j++ )
     FontMetrics fm;
     int dataLengthTmp;
     String valueTable;
     fm = JTable1.getFontMetrics(JTable1.getFont());
     if ( test.getValueAt(j, i) == null )
     System.out.println("Valeur nulle...");
     dataLengthTmp = 0;
     else
     valueTable = test.getValueAt(j, i).toString();
     dataLengthTmp = fm.stringWidth(valueTable);
     System.out.println(valueTable + " = " + dataLengthTmp);
     if ( dataLengthTmp > dataLength )
     dataLength = dataLengthTmp;
     if ( dataLength != 0 )
column.setWidth(dataLength + 5);
else
column.sizeWidthToFit();
JTable1.setModel(test);
JTable1.repaint();
import java.util.Vector;
import java.sql.*;
import com.sun.java.swing.table.AbstractTableModel;
import com.sun.java.swing.event.TableModelEvent;
public class JDBCAdapter extends AbstractTableModel {
Connection connection;
Statement statement;
ResultSet resultSet;
String[] columnNames = {};
Vector rows = new Vector();
ResultSetMetaData metaData;
public JDBCAdapter(String url, String driverName,
String user, String passwd) {
try {
Class.forName(driverName);
System.out.println("Ouverture de la connexion a la base de donnee...");
connection = DriverManager.getConnection(url, user, passwd);
statement = connection.createStatement();
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
public void executeQuery(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
resultSet = statement.executeQuery(query);
metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
columnNames = new String[numberOfColumns];
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames[column] = metaData.getColumnLabel(column+1);
// Get all rows.
rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= getColumnCount(); i++) {
newRow.addElement(resultSet.getObject(i));
rows.addElement(newRow);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void executeUpdate(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
statement.executeUpdate(query);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void close() throws SQLException {
System.out.println("Fermeture de la connection a la base de donnee... Bye !");
resultSet.close();
statement.close();
connection.close();
protected void finalize() throws Throwable {
close();
super.finalize();
// Implementation of the TableModel Interface
// MetaData
public String getColumnName(int column) {
if (columnNames[column] != null) {
return columnNames[column];
} else {
return "";
public Class getColumnClass(int column) {
int type;
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return super.getColumnClass(column);
switch(type) {
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
return String.class;
case Types.BIT:
return Boolean.class;
case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
return Integer.class;
case Types.BIGINT:
return Long.class;
case Types.FLOAT:
case Types.DOUBLE:
return Double.class;
case Types.DATE:
return java.sql.Date.class;
default:
return Object.class;
public boolean isCellEditable(int row, int column) {
try {
return metaData.isWritable(column+1);
catch (SQLException e) {
return false;
public int getColumnCount() {
return columnNames.length;
// Data methods
public int getRowCount() {
return rows.size();
public Object getValueAt(int aRow, int aColumn) {
Vector row = (Vector)rows.elementAt(aRow);
return row.elementAt(aColumn);
public String dbRepresentation(int column, Object value) {
int type;
if (value == null) {
return "null";
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return value.toString();
switch(type) {
case Types.INTEGER:
case Types.DOUBLE:
case Types.FLOAT:
return value.toString();
case Types.BIT:
return ((Boolean)value).booleanValue() ? "1" : "0";
case Types.DATE:
return value.toString(); // This will need some conversion.
default:
return "\""+value.toString()+"\"";
public void setValueAt(Object value, int row, int column) {
try {
String tableName = metaData.getTableName(column+1);
// Some of the drivers seem buggy, tableName should not be null.
if (tableName == null) {
System.out.println("Table name returned null.");
String columnName = getColumnName(column);
String query =
"update "+tableName+
" set "+columnName+" = "+dbRepresentation(column, value)+
" where ";
// We don't have a model of the schema so we don't know the
// primary keys or which columns to lock on. To demonstrate
// that editing is possible, we'll just lock on everything.
for(int col = 0; col<getColumnCount(); col++) {
String colName = getColumnName(col);
if (colName.equals("")) {
continue;
if (col != 0) {
query = query + " and ";
query = query + colName +" = "+
dbRepresentation(col, getValueAt(row, col));
System.out.println(query);
System.out.println("Not sending update to database");
// statement.executeQuery(query);
catch (SQLException e) {
// e.printStackTrace();
System.err.println("Update failed");
Vector dataRow = (Vector)rows.elementAt(row);
dataRow.setElementAt(value, column);
Thanks to help me.

Hi,
OK. I have read your code sample again. It looks like the JDBCAdapter class is reloading table data in the executeQuery method. Why not call adjustColumns at the end of this method after the new rows and columns are loaded? Perhaps it also should be called at the end of executeUpdate. Have you tried doing that?
I would still set
JTable1.setAutoCreateColumnsFromModel (false); to prevent Java from readjusting the size automatically at some other time.
regards,
Terry

Enable column some column in a JTable

Hi guys i have to enable just one column named QUANTITE in my JTable...i read that i must overwrite the isCellIditable() method to do so..
here my code:
final int QUANTITE = 2;
public boolean isCellEditable(int row, int column){
if(column == QUANTITE){
return true;
else{
return false;
help me please :P

ok...but hehe the problem is that anyway all columns
are editable...Make sure that your JTable does really use your TableModel but not something else

How to make table as "editable false"

Dear Forum,
i am user of jDeveloper jClient/Swing .jpr.
cutomer table having following attributes-
1.cust_id (primary key)
2.cust_name
3.cust_add
Suppose customerview bind with jTable1.
Using ViewObjectEditor, i set "updateable never" for all fields.
This show error, when data insert into table " cust_id as
read only".
Help me, Using jClient Binding how to make Table as "editable false".

Overriding method prepareEditor() for new table:
private JTable tableList = new JTable(){
public Component prepareEditor(TableCellEditor editor, int row, int column) {
// 1 and 2 column is not editable
if(column == 0 || column == 1){ return null; }
return super.prepareEditor(editor, row, column);

How can I add custom right-click-menu to column headers in JTable?

Can anyone point me to a topic on how to customize a popup menu for column headers in JTable? Specifically, I want to add things like "auto-size column" and "hide column".
Thanks,
Matt

Right-click on your table. Then go to Advanced->Runtime Shortcut Menu->Edit.
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How to prevent editing a SharePoint site column value from document properties view of a downloaded document?

Hi,
We have created a SharePoint site column with below settings
1. ShowInEditForm - False
2. ShowInNewForm - False
3. ShowInDisplayForm - True
With the above definition, the site column showing only in view properties form not in New and Edit forms. This column is added to a document library and updating this column value will be managed by event receiver code when a document is uploaded.
Till this point, everything is working OK.
But the issue is when we download and open a document from the above document library, under document properties the above column (with value) is visible along with other document default properties and this column value is editable. With this issue,
user is able to set a new value and overwrite the existing value by re-uploading the document.
Could you please let me know how to handle this issue so that user should not be allowed to edit except viewing the value/property (read only)?
Thanks in advance.
Regards
Ramesh

You can set "ShowInFileDlg" property of field to "FALSE". Using this you will not see that field in document properties list

How can I use a column header to select columns in a JTable?

Hello,
I've been working for ages on this, but I still can't come up with a suitable solution. What I want to be able to do is select a column header from a JTable, which in turn would select the corresponding column in my JTable. I cant seem to do this with a mouse listener, and I can't see how to toggle the buttons of the header either.
Any help would be gratefully appreciated.
Mike

I have both row and columns selected depending on what you do in the JTable. Here's my code:
where you init your JTable add:
addressTable = new JTable(addressTableModel, addressTableColumnModel);
JTableHeader th = addressTable.getTableHeader();
th.addMouseListener(new tableHeaderMouseAdapter(addressTable));
addressTable.getSelectionModel().addListSelectionListener(new selectionListener(addressTable));
addressTable.setColumnSelectionAllowed(true);
tableHeaderMouseAdapter looks like this (it should look familiar):
private class tableMouseAdapter extends MouseAdapter
     private JTable tableView;
     public tableMouseAdapter(JTable newTableView)
          tableView = newTableView;
     public void mouseClicked(MouseEvent e)
          int selectedRow = tableView.getSelectedRow();
          if ((e.getClickCount() == 1) && (selectedRow != -1))
               tableView.clearSelection();
               tableView.setRowSelectionInterval(selectedRow, selectedRow);
               tableView.setColumnSelectionInterval(0, tableView.getColumnModel().getColumnCount() - 1);
selectionListener looks like this:
private class selectionListener implements ListSelectionListener
     private JTable tableView;
     private boolean changingSelection;
     public selectionListener(JTable newTableView)
          tableView = newTableView;
          changingSelection = false;
     public void valueChanged(ListSelectionEvent e)
          if ((!changingSelection) && (tableView.getSelectedColumnCount() < tableView.getColumnCount()) && (tableView.getSelectedRowCount() < tableView.getRowCount()))
               changingSelection = true;
               int selectedRow = tableView.getSelectedRow();
               if (selectedRow >= 0)
                    tableView.clearSelection();
                    tableView.setRowSelectionInterval(selectedRow, selectedRow);
               tableView.setColumnSelectionInterval(0, tableView.getColumnModel().getColumnCount() - 1);
               changingSelection = false;
I'm sure there is a better way to do this, but it's the first thing I could get to work.
disclamer:
Use this code at your own risk. I make no claims about this code whatsoever.

( im new to java) How do I increase number of columns in a JTable ?

I am dooing a small calculating program in school and can't figure out how to change the amount of columns in a JTable, my programming skills sofar are extremely basic and therefore we are using the netbeans GUI to create our windows. The code generated by the GUI cannot be edited and I have tried to copy paste the code into Eclipse but it didn't work.
I have a fair idea of where in the code you can preform the things I want but I need to do it in the grapical interface.
any suggestions are very much appriciated.

my programming skills sofar are extremely basic and therefore we are using the netbeans GUI to create our windows.Using and IDE doesn't not make it easier. As you've found out it only makes it harder since you can't edit the code and take full control.
Read the Swing tutorial, it contains plenty of example for building GUI applications:
http://java.sun.com/docs/books/tutorial/uiswing/TOC.html
I don't really understand your question, because if you create the table correctly, then then is no need to increase the number of columns. However, the table does support an addColumn(....) method.

Selective reordering of columns in a Jtable

Hi
I have this problem where I need to allow the first 8 columns to be reordered but not the remaining columns in a Jtable.
I have tried a few approaches by adding listeners to the jtable header and identifying the column which is clicked for reordering and accordingly setting the rearrange policy / feature of the jtable to true/false.
This works fine in almost all scenarios except for one where the user selects a column which can be reordered and drags it to a position beyond the allowed 8 columns, and now that column is frozen since it is beyond the permissible index of 8.
I was wondering if there was a 'cleaner'/ better way to go about implementing this.

Thanks for the link...
I went through it but seems like a big change for the functionality I want to achieve.
I am thinking about allowing the user to reorder the column and then if he has chosen an invalid column (one which cannot be rearranged) just undo that action using the moveColumn method.
I tried overriding the columMoved method to inform me about a column reorder evernt but that method keeps getting fired while the user is rearranging.
Is there anyway to get a notification once the user is done rearranging the column.
Thanks

How can I add new row/column into existing jTable?

Hi add!
Can you help me how can I add new row/column into existing jTable?
Tnx in adv!

e.g
Create two buttons inside the Table ( "Add New Row" ) and ("Add new Column")
their handlers are:
add new row:
//i supose u already have
DefaultTabelModel tablemodel = new DefaultTableModel(rowdata, columnNames);
//and
   JTabel jtable = new JTable(tablemodel);
// Handler (row)
jbtAddRow.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent e) {
      if(jtable.getSelectedRow() >= 0 )
          tablemodel.insertRow(jtable.getSelectedRow(), new java.util.Vector());
       else
            tablemodel.addRow(new java.util.Vector());
    });to add new columns its the same but inside actionPerformed method:
ask for e.g "Whats the name for the new column"
then,
   tablemodel.addColumn(nameOfColumn, new java.util.Vector());   Joao
Message was edited by:
Java__Estudante

JTable- how can i disable editing

hi
could anyone please lemme know if there is any way to disable editing in a jtable. i tried disabling it, but ;) hehe, well that diables selecting a row also then. One more thing, is there any simpler method to add scroll bars to a panel or frame without having to place the panel itself into a jscrlolpane, 'cos im having too many other problems when i make a nested panel. if anyone has a solution , please do tell me
thankyou

u can do it when u use model for the table.
use AbstractTable model and over ride isCellEditable method returning false..
Check sun demo examples how to use AbstractTableModel...
very simple right....hihihi..

Matrix coloum Editable False

dear all
i had set editable fasle to one matrix coloum but now i need to set ti true
but in the screen painter i set it to true but still at the run time it wont work
still i cant edit the value in that coloum.....
is there another way to remove the editable false?
thanks in advanece

Hi
Dim Mat As SAPbouiCOM.Matrix = oForm.Items.Item("MatrixName").Specific
Dim column As SAPbouiCOM.Column = Mat.Columns.Item("columnName")
column.Editable =True
Write this code in your after from load event
Hope this will help
Regards
Vivek

Making Cell of matrix editable =false

oForm.Mode = SAPbouiCOM.BoFormMode.fm_ADD_MODE;

hi
   Dim om As SAPbouiCOM.Matrix
        om = Me.m_SBO_Form.Items.Item(enControlName.mtxDetails).Specific
        om.Columns.Item(enControlName.colItemCode).Editable = False
regards

Editable(false) on a column in a JTable. how to?

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