How to do Multi Cell Selection in JTable

Dear Friends,
Any body know Multi cell selection in jtable......
Thanks

Try overriding the changeSelection(....) method of JTable.
public void changeSelection(int row, int column, boolean toggle, boolean extend)
if (d.after(currentDate)
super.changeSelection(row, column, toggle, extend);
}

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How to restrict the cell selection in JTable based on cell contents...

Hi all,
I have some problem related to table cell selection.
I have a table that represets the calendar of some month and year.
I have the restriction that at one time only one cell could be selected.
Now i want the cell seletion like this,
I want only those dates to be selected if that date is after 'today'.
that is I want to restrict the selection of previous dates.
how can i do this.
I have overridden the table methods like this, still no use.
table = new JTable(model) {
setOpaque(false);
setSurrendersFocusOnKeystroke(false);
setRowHeight(20);
JTableHeader header = getTableHeader();
header.setOpaque(false);
getTableHeader().setReorderingAllowed(false);
setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
getTableHeader().setResizingAllowed(false);
setCellSelectionEnabled(true);
setFocusable(true);
setBackground(new Color(247, 251, 255));
setFont(newFont);
public boolean isCellEditable(int row, int col) {
return false;
public boolean isCellSelected(int row, int col) {
int r = getSelectedRow();
int c = getSelectedColumn();
String val = (String)getValueAt(r,c);
Calendar cal = Calendar.getInstance();
cal.set(currentYear+1900, month,Integer.parseInt(val));
Date d = cal.getTime();
Date currentDate = new Date();
if (d.before(currentDate)) {
     return false;
} else {
     return true;
Someone please help...
-Soni

Try overriding the changeSelection(....) method of JTable.
public void changeSelection(int row, int column, boolean toggle, boolean extend)
     if (d.after(currentDate)
          super.changeSelection(row, column, toggle, extend);
}

Problem in cell selection in JTable Java Swing

hii
I am using JTable that shows data from database. I have developed one functionality. I change one cell value and then select multiple cell. If I press F12 function key then it copies first selected value and past it to another selected cells. it is working properly but when I press F12 it sets the last selected cell in editable mode. I want that all cell which has been pasted should be selected (with default blue colour not in editing mode). I am using ListSelectionListener for JTable Cell Selection and KeyListener for F12 functionality.
Please give some solution
I can not override editCellAt Method because i have already extended JFrame. and i tried to do this with Jtable.getSelectedColumn and getSelectedRow it is displaying the same value, by this how can I get the particular area of selection means Row nd Column Selected.
How would I know the current selection when user selects more than one cell???
Thanks
Edited by: 850979 on 11-Apr-2011 02:13
Edited by: 850979 on 11-Apr-2011 03:59

camickr wrote:
Presumably, JTable installs an action for the F12 key that results in starting editing the last selected cell.
There are no bindings for F12. See the [url http://www.camick.com/java/blog.html?name=key-bindings]Key Bindings listing. (...)
Right.
Of course it doesn't make sense that a F? key should invoke the editorI thought he meant F2 ("edit" on Windows), so that sounded natural.
All KeyEvents are passed to the editor for the cell and the editor is psuedo invoked. That is, the caret is not placed on the text field used as the editor, but the character typed is added to the editor. You can then either use tab/enter to save the text or use the escape key to cancel the editing.Thanks for the explanation. I had never noticed (I kept on double-clicking my JTable cells when I wanted to edit them! :o)
Of course it doesn't make sense that a F? key should invoke the editor, but this is a by product of all KeyEvents being forwarded so you don't have to have special Key Bindings for every character.You're right - as always.
They (Sun) could have filtered out some of the keys such as those, though, because as noted by the OP the current behavior is unintuitive.
To better control when the cell is editable based on the KeyEvent you can override the table with code like <snipped>
As you suggested using a Key Binding will prevent this behaviour as well (but only for that key).Right again, but in this specific case that is acceptable (the developer wants to attach a specific behavior to a specific key only).
OP here is an SSCCE of that second approach:
public class TestKeyBindingsOnJTable {
    public static void main(String... args) {
        final DefaultTableModel dtm = new DefaultTableModel(new String[] {"A", "B"}, 0);
        dtm.addRow(new String[]{"A1", "B1"});
        dtm.addRow(new String[]{"A2", "B2"});
        dtm.addRow(new String[]{"A3", "B3"});
        JTable table = new JTable(dtm);
        table.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_F12, 0), "clear");
        table.getActionMap().put("clear", new AbstractAction() {
            public void actionPerformed(ActionEvent e) {
                dtm.removeRow(0);
        JOptionPane.showMessageDialog(null, table);
}Edited by: jduprez on Apr 8, 2011 9:36 PM

Contiguous and non-contiguous multiple cell selection in JTable

I desparately need your help on this.
My appliaction contains a JTable. The users should be permitted to select multiple cells (both contiguous and non-contiguous) using
Ctrl + Click -- add that cell the already existing selection
Shift + Click -- add all cells in the range to the selection.
I like to have the selection behaviour as that in Excel (where you could ctrl + click on any cell to add it to selection).
Questions:
==========
Is this behavior possible using JTable?
How to do this?

Hi, use
JTable table = new JTable();
DefaultListSelectionModel dlm = new DefaultListSelectionModel();
dlm.setSelectionMode( ListSelectionModel.MULTIPLE_INTERVAL_SELECTION ); //1( the first one should be the one you are looking for)
or (choose 1 or 2, the rest stays the same)
dlm.setSelectionMode( ListSelectionModel.SINGLE_INTERVAL_SELECTION );//2
table.getColumnModel().setSelectionModel(dlm);
table.setCellSelectionEnabled(true);Hope this helps.
Greetings Michael.

How to enable Multi-record select in Oracle Forms

Hi
we recently upgraded to R12 -- 12.1.3.
we have a requirement in which I should let the users select multiple records in a tabular Form (custom form).
Currently we have a custom form that displays Open sales orders with credit holds. After selecting the record, the user can release the hold on the order by clicking on a button. The requirement is for enabling selection of multiple records and release.
We have a similary functionality in 'Quick Sales Orders' form. In this form, multiple lines can be selected by pressing 'CTL' and clicking on the records.
I read about using APP_MULTI for this. But I couldnt figure out how to enable the multiple selection.
If someone could throw some light on this, it would be greatly helpful

See http://stackoverflow.com/questions/3291758/how-do-i-use-the-app-multi-package-to-support-multi-selection-in-my-oracle-form for steps/sample code.
Sandeep Gandhi

How to make a cell in a JTable to be uneditable and handle events

I tried many things but failed,How do you make a cell in a JTable to be uneditable and also be able to handle events>Anyone who knows this please help.Thanx

Hello Klaas2001
You can add KeyListener ,MouseListener
Suppose you have set the value of cell using setValueAt()
table.addKeyListener(this);
public void keyTyped(KeyEvent src)
String val="";
int r= table.getEditingRow();
int c= table.getEditingColumn();
val=table.getValueAt(r,c).toString();
if (r!=-1 && c!=-1)
TableCellEditor tableCellEditor = table.getCellEditor(r, c);
tableCellEditor.stopCellEditing();
table.clearSelection();
table.setValueAt(val,r,c);
public void keyReleased(KeyEvent src)
public void keyPressed(KeyEvent src)
table.addMouseListener(this);
public void mouseClicked(MouseEvent e)
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
public void mousePressed(MouseEvent e)
public void mouseReleased(MouseEvent e)
if(e.getClickCount()>=2)//Double Click
table.clearSelection();
int r= table.getEditingRow();
int c= table.getEditingColumn();
if (r!=-1 && c!=-1)
TableCellEditor tableCellEditor = table.getCellEditor (
r,c);
tableCellEditor.stopCellEditing();
table.clearSelection();
table.setValueAt("",r,c);
}//Mouse Released
You can remove keyListener and Mouse Listener whenever You want to edit
then add it later.
Regarding handling events implement javax.swing.event.TableModelListener
table.getModel().addTableModelListener(this);
public void tableChanged(javax.swing.event.TableModelEvent source)
TableModel tabMod = (TableModel)source.getSource();
     switch (source.getType())
case TableModelEvent.UPDATE:
     break;
     }//Table Changed Method
//This method gets fired after table cell value is changed.

How to resize a cell in a JTAble

Hi everyone,
i have a question how can be done that a column of cells will have an specific size and that other column will be smaller or bigger than the other

Hi,
If you mean how to set the columns of your jtable to be of different widths, it can be done as follows:
      TableModel tm =table.getModel();
      int colcount = tm.getColumnCount();
      TableColumnModel tcm = table.getColumnModel();
      for(int s=0;s<colcount;s++) {
            tcm.getColumn(s).setPreferredWidth(150);
            tcm.getColumn(s).setMinWidth(150);
      }Just set the width you want based on the column no in the code above.
cheers,
vidyut
http://www.bonanzasoft.com

How to catch change cell selection in a JTable?

I'm using a ListSelectionListener with a JTable to catch the list selection changes but it only detects row changes, and if i select a different cell but within the same row it does not trigger the event.
Do you guys know a way to detect this event?
Thanks!!!

I'm using a ListSelectionListener with a JTable to catch the list selection changes but it only detects row changes,Try adding a listener for the columns as well:
table.getTableHeader().getColumnModel().getSelectionModel().addListSelectionListener(...);

How to listen for cell selection changes within a JTable

Problem: my table has 8 columns, with 4 of them containing very large text (up to 1000 chars). Solution is to set the initial size these columns so that the 1st 20 chars are visible, and if one of these columns gains focus/selection via mouse-clicking/tabbing/arrow keys, the entire text is shown in a JTextArea below the table.
I added a ListSelectionListener to the table, but this only informs me when the row selection has changed.
I added a FocusListener to the table, but this only informs me when the table gains/loses focus, not when it's been changed within.
I added a TableColumnModelListener to the TableColumnModel, but this only informs me when the column selection has changed.
I didn't bother with MouseListener as this won't handle change of selection via tabbing.
The LSL got me half way there, and the TCML got me the other half. Any ideas on how to combine?
Or is there something obvious that I'm missing?

Walter Laan wrote:
Use both and call the same method which updates the text area based on the current selected (or focused == lead selection index) cell.Yeah - that's what I figured. I just didn't know if there was a magic bullet (i.e., a single listener) out there that I was missing.
While you are at it, also add a table model listener which calls the same method if the selected cell is updated.I'll keep that in mind, but it's not necessary in this particular case. The table cells in question will be uneditable. The text area will have supporting Edit/Save/Cancel buttons.

How to pass multi value selection parameter to SAP Function Module?

Hi ,
Anyone know how to pass CR multi value parameter - array to SAP Function module ?
eg multi selection of customer in CR
and then pass to Function module
in SAP FM, the SQL select these customer only
How should the import parameter / table of SAP Function module designed?
and how should CR pass the data to SAP FM
thx
John

Moved to Integration Kit forum

How do I change the colour of a selected cell in a jTable?

I have a Jtable that displays URL names in one column. There are several problems I'm having. The effect I'm trying to achieve is this:
When the user runs the mouse over the URL name the cursor should change into a hand (similar to what happens in an HTML hyperlink). I'm aware that the Cursor class can set the cursor graphic so i figure that i need a listener of some sort on each cell (so the cursor can change from an arrow to a hand) and also one to indicate when the cursor is not on a cell (so that it can change from a hand back into an arrow). Is this the right track?
Also, I've looked at the DefaultTableCellRenderer class (which, as i understand it, is responsible for how each cell in the jtable is displayed) for a method that will allow me to set the background of a selected cell (or row or column). I require this because each time i select a cell (or row) it becomes highlighted in blue. I would rather it just remained white and changed the cursor to a hand. I know there exists a method for setting the background for an unselected cell but none for a selected cell. Again, I'm not sure if I'm going down the right track with this approach.
Lastly, if the cell has been selected (by a mouse click) the font of the writing in the cell (i.e. The name of the URL) should change. This shouldn't be too much of a problem I think.
I do not expect anyone to provide code to do all of this but some general pointers would be extremely helpful as I do not know if I'm thinking on the right track for any of this. Having some (limited) experience with Swing I doubt there is a simple way to do this but I can only hope!
Thanks.
Chris

http://www2.gol.com/users/tame/swing/examples/SwingExamples.html
there you can find some examples with CellRenderer's and so on ...
have fun

How to programatically select different JTable cells

Dear all,
I need to programatically select different JTable cells.
I have to make the inverse selection. So if the user has a table of one column and 10 rows, and selects rows 3,6,8, the inverse selection should select all the other remainig cells and deselect 3,6, and 8.
I tried using the following but it does not work ?
for (int i = 0; i < table.getRowCount(); i++) {
table.changeSelection(i, 0, true, false);
Hope someone can help.
Regards,
Kanita

Dear all,
I need to programatically select different JTable cells.
I have to make the inverse selection. So if the user has a table of one column and 10 rows, and selects rows 3,6,8, the inverse selection should select all the other remainig cells and deselect 3,6, and 8.
I tried using the following but it does not work ?
for (int i = 0; i < table.getRowCount(); i++) {
table.changeSelection(i, 0, true, false);
Hope someone can help.
Regards,
Kanita

Jtable in cell how to single mouse click make the cell selected.

it seems need double click make cell selected.
thanks!!!

Hi,
these link will help you.
It has code for both examples, with 1 click and with 2 clicks:
http://forum.java.sun.com/thread.jsp?forum=57&thread=362073&tstart=0&trange=15
sergio.

How to get the default selection color from JTable

Hi, there,
I have a question for how to get the default selection color from JTable. I am currently implementing the customized table cell renderer, but I do want to set the selection color in the table exactly the same of default table cell renderer. The JTable.getSelectionBackgroup() did not works for me, it returned dark blue which made the text in the table unreadable. Anyone know how to get the window's default selection color?
Thanks,
-Jenny

The windows default selection color is dark blue. Try selecting any text on this page. The difference is that the text gets changed to a white font so you can actually see the text.
If you don't like the default colors that Java uses then use the UIManager to change the defaults. The following program shows all the properties controlled by the UIManager:
http://www.discoverteenergy.com/files/ShowUIDefaults.java
Any of the properties can be changed for the entire application by using:
UIManager.put( "propertyName", value );

Selecting cells in a JTable

Hi All,
I'm looking for a way of selecting all cells from the original drag point to the current cell that the mouse is over.
This is for a year planner which displays the months vertcally and the days horizontally. So if the user was to start selecting cells in one month and move the mouse down a row onto the next month, I would want all cells selected from the first cell to the current cell.
Has anyone got any ideas?

Hi Pchatwin,
Any dukes available for bad news? :)
Thanks Stas but wouldn't that select entire rows
rather than cells?
For example, if I have a grid:
12345
67890
and drag from cell 3 to cell 9 I would need to see
cells 3, 4, 5, 6, 7, 8, 9 highlightedUnfortunately this is impossible with JTable's default selection model. By default, JTable models selections simply as an intersection of selected rows and columns. It doesn't track individual cells.
Turning to your example:
If you select cells 2,3,4,5 JTable tracks the following.
Note: The numbers I am using are row/col indexes, not your cell values.
Selected rows = {0}
Selected cols = {1,2,3,4}
This means the following cells are selected:
{{0,1},{0,2},{0,3},{0,4}} or {2,3,4,5}
Now if you want to add cells 6, 7, 8, 9 it won't work. The selection model tracks whether a column is selected or not. It can't be selected for one row and not for another. So it's impossible to have cell 6 selected and not 1. It would mean that column 0 would need to be both selected (to include 6) and not (to include 1). Does this make sense?
Sorry to have to tell you that. On the other hand it may save you some frustration.
Oh, and whether or not one can provide a custom model that allows this, I don't know - I've not tried it myself. It could be, but might be very difficult. For example, what would you return from JTable.getSelectedRows()?
Thanks!
Shannon Hickey (Swing Team)
>
Paul

How to do Multi Cell Selection in JTable

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