Prevent jtable cell edit!!!!

when i double click any cell in a table it gets editable. but i dont wish to do this. i want all the cells in the table non editable. so nobody can change the cell content. anyone tell me how to do this. thank you.

Then search the forum for code that uses the isCellEditable(...) method to see examples.
Or you could even read the JTable API of all things. Then follow the link to the Swing tutorial on "How to Use Tables" which also has an example of overriding the isCellEditable(...) method. The code in the tutorial overrides the method of the TableModel. I prefer to override the method in the JTable.

Similar Messages

  • Start or stop edit jtable cell editing

    Hello,
    I got a problem with the jtable DefaultModel isCellEditable.
    If I set the IsCellEditable to false, I would not be able to enable the cell selection as and when I want it.
    What I have in mind is the add a mouselister so that if the user select a row using fast left mouse click like the procedure shown below
    private class MouseClickHandler extends MouseAdapter {
    public void mouseClicked(MouseEvent event) {
    int no_mouseclick = 0;
    no_mouseclick = event.getClickCount();
    if (no_mouseclick >= 2) {
    int cur_row = 0;
    cur_row = table.getSelectedRow();
    // table.setColumnSelectionAllowed(true);
    // table.setRowSelectionAllowed(true);
    for (int i=0;i<table.getColumnCount();i++){
    table.editCellAt(cur_row,i);
    System.out.println("mouse row--->" + cur_row);
    I could overwrite the IsCellEditable to true to enable that particular or cell contains in that row to be able to accept input and overwrite any data which in my case obtained from the Sql database a sort of like input module using tabulation . I am also thinking of using text component or combobox to display the value for user selection , but I do not know how to enable a particular cell for editing if the Jtable created is using a non-editable DefaultModel. If I set the IsCellEditable to true, every single cell would be enable for editing , and this defeat the purpose of enable user input only upon double mouseclicks.
    By the way , I am interested to know how to track the data changes in the cell within the jtable so that only those have been modified are notify from the Table model and updated into the Sql table
    Could anyone of you out there provide some hints please
    Thanks

    Hello,
    Tablemodellistener could detect the changes in the data, how about the backend database updating and transactional activity that must be associated with the data changes?
    What is on my mind is that , the moment there is changes in the data detected by the TableModellistener, whatever records associated with or brougt up by Jtable would be all deleted from the database and then follow by the new set of new records to be inserted into the database. The disadvantage of this method is that everytime the backend database connection and activity need to be executed the moment there is a change in the data in the jtable cell. For example the user may be just amendment to only one cell , but all the records associated need to be deleted and then inserted again.
    Perhaps there are better solution to deal with Jtable and JDBC backend connection where in this case, I am using JDO to undertake the database activity like the observable modelling .
    Could someone provide the hint please
    Thank

  • JTable cell edits return to original values

    Hi
    I am making some progress with using AbstractTableModel, however I have a problem whereby any edits that I make to cells within the table are being lost when I add a new row��the original values are re-appearing.
    I have searched through the forum looking for a solution but with no success thus far.
    I believe that the solution lies with the fireTableDataChanged() method but thus far I have had no success. My problem (I believe) is that I cannot work out how to fire it when a user leaves the newly edited cell.
    The method that adds the new rows is shown below and is called from a button on the Frame that houses the jTable. I have tried firing the method from here, hoping that all table edits will persist, but unfortunately they still disappear.
    public void fillTable()
            if(c > 0)
                for (int i = 0; i < c; i = i + 1)
                    this.setValueAt(((JobItemClass) items.get(i)).getItemNumber(), i, 0);
                    this.setValueAt(((JobItemClass) items.get(i)).getDescription(), i, 1);
                    this.setValueAt(((JobItemClass) items.get(i)).getCostPerItem(), i, 2);
                    this.setValueAt(((JobItemClass) items.get(i)).getQuantity(), i, 3);
        public void addRow()
            newItem = new JobItemClass();   //Create an object to hold the new row defsault values
            newItem.setItemNumber(c + 1);
            newItem.setDescription("");
            newItem.setCostPerItem(0.0);
            newItem.setQuantity(0);
            items.add(c, newItem);          //Add the default object to the array
            c = c + 1;                      //Update the variable holding the array size
            table = new Object[c][4];       //Increase the size of the object that acts as the table
            fireTableRowsInserted(c, c);    //Alert the object acting as the table that there is a new row
            fillTable();                    //Refresh the display to reflect the new row default values      
        }As always, any help greatly appreciated
    GB

    Thanks again for the replies people.
    I decided to edit this message and post updated code which can be seen below. This is a result of re-reading the helpfull advice from both azukov and camickr who took the time to respond to my initial request for help. I still have to work out how to validate user input but am sure that the tableChanged method will be the key.
    A simple tutorial also provided great assistance, especially helping eith the implementation of the TableModelListener. I have provided a link to the tutorial here:
    http://www.javalobby.org/articles/jtable/
    The coding was carried out in netbeans 5.5, libraries have not been included.
    Here is my updated code......table model first:
    public class MyJobItemTableModel extends AbstractTableModel
        JobItemClass newItem;   //Procides a default record when nothing available
        int jobNo;
        int c;
        ArrayList items;        //Stores the objects that provide the records
        public MyJobItemTableModel(int j)
            jobNo = j;
            items = (new JobAllItems(jobNo)).getItems();
            c = items.size();
        String columnName[] = { "Item Number", "Item Description", "Cost per item", "Quantity" };       
        Class columnType[] = { Integer.class, String.class, Double.class, Integer.class };
        /**************************This method probably now redundant************************
        public void storeCellValue(int row, int col)
            if(col == 0)
                ((JobItemClass) items.get(row)).setItemNumber((Integer) this.getValueAt(row, col));
            if(col == 1)
                ((JobItemClass) items.get(row)).setDescription((String) this.getValueAt(row, col));
            if(col == 2)
                ((JobItemClass) items.get(row)).setCostPerItem((Double) this.getValueAt(row, col));
            if(col == 3)
                ((JobItemClass) items.get(row)).setQuantity((Integer) this.getValueAt(row, col));
        public void addRow()
            c = c + 1;                          //Update the variable holding the array size
            newItem = new JobItemClass();       //Create a default object to fill the new row
            newItem.setItemNumber(c);
            newItem.setDescription("");
            newItem.setCostPerItem(0.0);
            newItem.setQuantity(0);
            items.add(c-1, newItem);
            this.fireTableRowsInserted(c, c);   //Update the display to show the added row.
        public int getColumnCount()
            return 4;
        public int getRowCount()
            return items.size();
        public Object getValueAt(int r, int c)
            JobItemClass jic = (JobItemClass) items.get(r);
            switch(c)
                case 0:
                    return jic.getItemNumber();
                case 1:
                    return jic.getDescription();
                case 2:
                    return jic.getCostPerItem();
                case 3:
                    return jic.getQuantity();
                default:
                    return new Object();               
        public String getColumnName(int column)
            return columnName[column];
        public Class getColumnClass(int c)
            return columnType[c];
        public boolean hasNoItems()
            if(items.size() == 0)
                return true;
            else
                return false;
        public boolean isCellEditable(int r, int c)
            return true;
        public void setValueAt(Object aValue, int r, int c)
            JobItemClass jic = (JobItemClass) items.get(r);
            switch(c)
                case 0:
                    jic.setItemNumber((Integer)aValue);
                    break;
                case 1:
                    jic.setDescription((String)aValue);
                    break;
                case 2:
                    jic.setCostPerItem((Double)aValue);
                    break;
                case 3:
                    jic.setQuantity((Integer)aValue);
                    break;              
            fireTableCellUpdated(r, c);
    }......and now the view (what the user sees)
    public class ViewItems extends javax.swing.JPanel
        protected MyJobItemTableModel myModel;
        /** Creates new form ViewItems */
        public ViewItems()
            initComponents();
        public void createTable(int jobNo)
            myModel = new MyJobItemTableModel(jobNo);
            myModel.addTableModelListener(new ViewItems.ViewItemsTableModelListener());
            jTable1.setModel(myModel);
            //jTable1.setSurrendersFocusOnKeystroke(true);  //not sure what this does
            if (myModel.hasNoItems())
                myModel.addRow();          
            public void run(int jobNo)
                createTable(jobNo);
                try
                    UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
                    JFrame frame = new JFrame("Invoice Breakdown");
                    frame.addWindowListener(new WindowAdapter()
                        public void windowClosing(WindowEvent evt)
                            setVisible(false);
                    frame.getContentPane().add(this);
                    frame.pack();
                    frame.setVisible(true);
                catch (Exception e)
                    e.printStackTrace();
            /**This class is required in order to respond to any changes that happen
             * to the table or data within, i.e. the user editing data in a cell.
             * The tablemodel (MyJobItemTableModel) will 'fire' the event and the
             * tableChanged() method will be executed.
            public class ViewItemsTableModelListener implements TableModelListener
                public void tableChanged(TableModelEvent evt)
                    if (evt.getType() == TableModelEvent.UPDATE)
                        int column = evt.getColumn();
                        int row = evt.getFirstRow();
                        System.out.println("row: " + row + " column: " + column);
                        jTable1.setColumnSelectionInterval(column + 1, column + 1);
                        jTable1.setRowSelectionInterval(row, row);
            /** This method is called from within the constructor to
             * initialize the form.
             * WARNING: Do NOT modify this code. The content of this method is
             * always regenerated by the Form Editor.
        // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                         
        private void initComponents()
            jScrollPane1 = new javax.swing.JScrollPane();
            jTable1 = new javax.swing.JTable();
            btnAddItem = new javax.swing.JButton();
            jTable1.setModel(new javax.swing.table.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"
            jScrollPane1.setViewportView(jTable1);
            btnAddItem.setText("Add Item");
            btnAddItem.addActionListener(new java.awt.event.ActionListener()
                public void actionPerformed(java.awt.event.ActionEvent evt)
                    btnAddItemActionPerformed(evt);
            org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
            this.setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                .add(layout.createSequentialGroup()
                    .addContainerGap()
                    .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                        .add(layout.createSequentialGroup()
                            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 589, Short.MAX_VALUE)
                            .addContainerGap())
                        .add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
                            .add(btnAddItem)
                            .add(264, 264, 264))))
            layout.setVerticalGroup(
                layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                .add(layout.createSequentialGroup()
                    .addContainerGap()
                    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(49, 49, 49)
                    .add(btnAddItem)
                    .addContainerGap(54, Short.MAX_VALUE))
        }// </editor-fold>                       
        private void btnAddItemActionPerformed(java.awt.event.ActionEvent evt)                                          
            ViewItems.this.myModel.addRow();
        // Variables declaration - do not modify                    
        private javax.swing.JButton btnAddItem;
        private javax.swing.JScrollPane jScrollPane1;
        private javax.swing.JTable jTable1;
        // End of variables declaration                  
        }Edited by: greenockboy on Oct 15, 2007 8:17 PM

  • How to set JTable cell editable/non-editable dynamically using NetBean?

    I am using NetBean 6.5, create a database desktop application, I using the persistence entity manager to bind my JTable with database.
    Now, I want to set practicular cells which are enable and disable, I tried to create my own table model and override the isEditable() method, which it seems didn't work. I guessed the problem is the persistence connection between my Table and database.
    How can I solve it? Any example? I just googled the web and can't find example which use netbean combined with database. I know that a single JTable would work when creating your own model.
    thx.

    I know what coding i did, Yes u r right but im new to GUI programming only,
    That's why i posted it to forums, I gone through the Control Flow Statements link what u have given.
    U didnt get my question at all.
    Again the problem im facing is the table is already displayed with 2nd column uneditable.
    When some Action done on table, i need to make 2nd column editable at run time.
    Thanks if u provide me the solution instead of deciding what type of programmer im.

  • JTable & Cell editing

    Hi,
    I am using JTable and facing following problem. My UI has a JTable and JButton with mnemonic set. The button populates the date into the table. Here is the sequence
    1) Enter into editing mode by pressing F2 and enter value EE
    2) I press the mnemonic set for button
    3) ActionListener attached to button is executed. This ActionListener populates the data into the table.
    4) The cell on which editing was started remains in the editing mode and the value for edited cell does not change to the populated by ActionListener but remains EE. (This is the problem)
    What i want is whenever focus moves out of the table if the table is in editing mode then it should cancel the editing.
    I tried attaching the focus listener but problem with this is focusLost is fired even when i press F2 i.e. start editing.
    Any help will be of great use
    Thanks in advance
    Sachin

    Hi,
    It works in normal scenaios. I faced problem in following
    1) My cell editor has a verifier attached. if i show a dialog box from verify method and then return false from method focus remains in cell only, this is fine.
    2) If i show the dialog and return true from verify method, table remains in editing mode and focus gets transferred to the field. This time i am navigating through mouse.
    3) In the same scenario (2) if i tab out of the field cell does not come out of edit mode i have to press tab to come out of the field.
    Any idea??
    Sachin

  • How can i make perticular row or perticular cell Editable  of a JTable

    Dear al,
    can u help me by guiding me for the problem of...
    i am having a JTable, in which a (first)column of each row is having a checkbox field.
    If the checkbox is checked then and then i should able to modify the cells in that row where the checkbox is.
    I have created the table with AbstractTableModel of which the isCellEditable(int row, int col) method is overwriten. Whatever return value (true/false) reflects the perticular
    cells becomes editable/non-editable respectively.
    but at run time...(mean the table is created now) and now i want to make the cells editable/non-editable depending on the checkbox value...
    how can i implement it.........
    please suggest.........
    thank you.........

    here is the sample code from tutorial.......
    * TableRenderDemo.java requires no other files.
    import java.awt.Component;
    import java.awt.Dimension;
    import java.awt.GridLayout;
    import javax.swing.DefaultCellEditor;
    import javax.swing.JComboBox;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    import javax.swing.table.AbstractTableModel;
    import javax.swing.table.DefaultTableCellRenderer;
    import javax.swing.table.TableCellRenderer;
    import javax.swing.table.TableColumn;
    * TableRenderDemo is just like TableDemo, except that it explicitly initializes
    * column sizes and it uses a combo box as an editor for the Sport column.
    @SuppressWarnings("serial")
    public class TableRenderDemo extends JPanel {
         private boolean DEBUG = true;
         public TableRenderDemo() {
              super(new GridLayout(1, 0));
              JTable table = new JTable(new MyTableModel());
              // table.setEditingColumn(0);
              // table.editCellAt(0, 0);
              table.setPreferredScrollableViewportSize(new Dimension(500, 100));
              // Create the scroll pane and add the table to it.
              JScrollPane scrollPane = new JScrollPane(table);
              // Set up column sizes.
              initColumnSizes(table);
              // Fiddle with the Sport column's cell editors/renderers.
              setUpSportColumn(table, table.getColumnModel().getColumn(2));
              // Add the scroll pane to this panel.
              add(scrollPane);
          * This method picks good column sizes. If all column heads are wider than
          * the column's cells' contents, then you can just use
          * column.sizeWidthToFit().
         private void initColumnSizes(JTable table) {
              MyTableModel model = (MyTableModel) table.getModel();
              TableColumn column = null;
              Component comp = null;
              int headerWidth = 0;
              int cellWidth = 0;
              Object[] longValues = model.longValues;
              TableCellRenderer headerRenderer = table.getTableHeader()
                        .getDefaultRenderer();
              for (int i = 0; i < 5; i++) {
                   column = table.getColumnModel().getColumn(i);
                   comp = headerRenderer.getTableCellRendererComponent(null, column
                             .getHeaderValue(), false, false, 0, 0);
                   headerWidth = comp.getPreferredSize().width;
                   comp = table.getDefaultRenderer(model.getColumnClass(i))
                             .getTableCellRendererComponent(table, longValues, false,
                                       false, 0, i);
                   cellWidth = comp.getPreferredSize().width;
                   if (DEBUG) {
                        System.out.println("Initializing width of column " + i + ". "
                                  + "headerWidth = " + headerWidth + "; cellWidth = "
                                  + cellWidth);
                   // XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
                   column.setPreferredWidth(Math.max(headerWidth, cellWidth));
         public void setUpSportColumn(JTable table, TableColumn sportColumn) {
              // Set up the editor for the sport cells.
              JComboBox comboBox = new JComboBox();
              comboBox.addItem("Snowboarding");
              comboBox.addItem("Rowing");
              comboBox.addItem("Knitting");
              comboBox.addItem("Speed reading");
              comboBox.addItem("Pool");
              comboBox.addItem("None of the above");
              sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
              // Set up tool tips for the sport cells.
              DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
              renderer.setToolTipText("Click for combo box");
              sportColumn.setCellRenderer(renderer);
         class MyTableModel extends AbstractTableModel {
              private String[] columnNames = { "First Name", "Last Name", "Sport",
                        "# of Years", "Vegetarian" };
              private Object[][] data = {
                        { "Mary", "Campione", "Snowboarding", new Integer(5),
                                  new Boolean(false) },
                        { "Alison", "Huml", "Rowing", new Integer(3), new Boolean(true) },
                        { "Kathy", "Walrath", "Knitting", new Integer(2),
                                  new Boolean(false) },
                        { "Sharon", "Zakhour", "Speed reading", new Integer(20),
                                  new Boolean(true) },
                        { "Philip", "Milne", "Pool", new Integer(10),
                                  new Boolean(false) } };
              public final Object[] longValues = { "Sharon", "Campione",
                        "None of the above", new Integer(20), Boolean.TRUE };
              public int getColumnCount() {
                   return columnNames.length;
              public int getRowCount() {
                   return data.length;
              public String getColumnName(int col) {
                   return columnNames[col];
              public Object getValueAt(int row, int col) {
                   return data[row][col];
              * 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();
              * Don't need to implement this method unless your table's editable.
              public boolean isCellEditable(int row, int col) {
                   // Note that the data/cell address is constant,
                   // no matter where the cell appears onscreen.
                   // return false;
                   return true;
              * Don't need to implement this method unless your table's data can
              * change.
              public 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() + ")");
                   data[row][col] = value;
                   fireTableCellUpdated(row, col);
                   if (DEBUG) {
                        System.out.println("New value of data:");
                        printDebugData();
              private void printDebugData() {
                   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("--------------------------");
         * Create the GUI and show it. For thread safety, this method should be
         * invoked from the event-dispatching thread.
         private static void createAndShowGUI() {
              // Create and set up the window.
              JFrame frame = new JFrame("TableRenderDemo");
              frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              // Create and set up the content pane.
              TableRenderDemo newContentPane = new TableRenderDemo();
              newContentPane.setOpaque(true); // content panes must be opaque
              frame.setContentPane(newContentPane);
              // Display the window.
              frame.pack();
              frame.setVisible(true);
         public static void main(String[] args) {
              // Schedule a job for the event-dispatching thread:
              // creating and showing this application's GUI.
              javax.swing.SwingUtilities.invokeLater(new Runnable() {
                   public void run() {
                        createAndShowGUI();

  • Need help serializing an AbstractTableModel for a JTable with cell editing.

    Fun times are ahead. Here we go!
    I have a JTable that contains data I'd like to serialize out to a file to be restored and viewed later.
    So I tried saving the AbstractTableModel subclass out to a file. Whenever I do this, I get the following error message:
    java.io.NotSerializableException: javax.swing.JTable$CellEditorRemover
    Now I know for fact that serializing an AbstractTableModel that was installed in a JTable without cell editing works just fine (my old code did exactly that). As a result, I think that the code that handles events in the AbstractTableModel contains references back out to the JTable, which causes the JTable to be saved no matter what (even though I'm just interested in saving the TableModel only). It causes a bigger file than normal, but file size is not an issue. The only issue I have is that CellEditorRemover (an undocumented inner class of JTable), which is automatically installed for JTables with editable cells, is not serializable.
    This leads to the following questions:
    1. Is there a way to avoid serialization/deserialization of the CellEditorRemover inner class of JTable?
    2. Is there a way to save an AbstractTableModel without saving all of the event listeners associated with it?
    I think an answer to either of these questions would go a long way towards solving my problem. Otherwise, I'll resign myself to weeping silently in the corner of my office.
    Thanks!

    I would suggest that if you can you only save the
    data... but i would do this by using the
    externalizable interface.
    What you will need to do is have the
    writeExternal(ObjectOutputStream out) and
    readExternal(ObjectOutputStream out) methods in your
    class. These will be responsiable for saving the
    data.
    Here's an example of what you can do in these
    methods... this is just a little tidbit from a program
    i've written.public void writeExternal(ObjectOutput out) throws
    IOException {
              out.writeInt(size);
              out.writeObject(drawName);
              out.writeInt(playersLength);
    for(int i = 0; i < playersLength; i++)
    ) out.writeObject(players);
              out.writeInt(seedsLength);
    for(int i = 0; i < seedsLength; i++)
    ) out.writeObject(seeds[i]);
              out.writeInt(drawLength);
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    ) out.writeObject(draw[i]);
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