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

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Reordering of columns in multiheader jtable.

i am using a jtable with multiheader .I am grouping columns to
form a multiheader.
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i want to consider a group of columns as one and reorder them
together.if i set setreordering allowed to true it reorders the
columns under the header which i dont want.
can somebody help me out please.

You will probably have to reload the column groups each time the columns get moved so that they reflect the new order.

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)
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          if ((e.getClickCount() == 1) && (selectedRow != -1))
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               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.

Changing the color of the column in a JTable based on the selection (mouse)

Hi,
I want to change the color of all the cells in a column based on the mouse clicked event.
I have managed to select the entire column. And, even, I have found a working example in the internet. But I don't understand why in my case it doesn't work.
This is the code (an inner class for a TableCellRenderer):
class MCTableCellRenderer extends JLabel implements TableCellRenderer {
          private static final long serialVersionUID = 1L;
          @Override
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                    int column) {
               setFont(table.getFont());
               if(value instanceof Double){
                    setHorizontalAlignment(SwingConstants.RIGHT);
                    DecimalFormat numberFormat = (DecimalFormat) NumberFormat.getInstance();
                    numberFormat.applyPattern("#######.#");
                    String val = numberFormat.format(value);
                    setText(val);
               if(isSelected){
                    setBackground(Color.RED);
                    System.out.println("is selected");
               else{
                    setBackground(Color.BLACK);
                    System.out.println("is not selected");
               return this;
    }I have set opacity to true for the contentPane, but without any result.
Any advice will be very apreciated.

Problem solved.
My Renderer should have extended the abstract class DefaultTableCellRenderer.
class MCTableCellRenderer extends DefaultTableCellRenderer {

How to set the Selected row and Column in JTable

Hi,
i have a problem like the JTable having one Method getSelectedRow() and getSelectedColumn to know the Selected row and Column but if i want to explicitly set the Selected Row and Column,then there is no such type of Methods.If anybody has any solution then i will be thankful to him/her.
Praveen K Saxena

Is that what you're looking for? :myTable.getSelectionModel().setSelectionInterval(row, row);
myTable.getColumnModel().getSelectionModel().setSelectionInterval(column, column);

How to programmatically select a column in a JTable

Hi,
I'm writing a program which requires me to select a column in the JTable through code. The problem is that I could only find getSelectedColumn() function in JTable and no setSelectedColumn().
Please let me know if there is any workaround for this.
Regards,
Derreck

Hi,
table.setColumnselectionInterval(index0,index1);
The above line will suffice your requirement.
Cheers,
Gokul.

Select row and column from header in jtable

hello i have a problem to select row and column from header in jtable..
can somebody give me an idea on how to write the program on it.

Hi Vicky Liu,
Thank you for your reply. I'm sorry for not clear question.
Answer for your question:
1. First value of Open is item fiels in Dataset2 and this value only for first month (january). But for other month Open value get from Close in previous month.
* I have 2 Dataset , Dataset1 is all data for show in my report. Dataset2 is only first Open for first month
2. the picture for detail of my report
Detail for Red number:
1. tb_Open -> tb_Close in previous month but first month from item field in Dataset2
espression =FormatNumber(Code.GetOpening(Fields!month.Value,First(Fields!open.Value, "Dataset2")))
2. tb_TOTAL1 group on item_part = 1
expression =FormatNumber(Sum(CDbl(Fields!budget.Value)))
3. tb_TOTAL2 group on item_part = 3 or item_part = 4
expression =FormatNumber(Sum(CDbl(Fields!budget.Value)) + ReportItems!tb_TOTAL1.Value )
4. tb_TOTAL3 group on item_part = 2
expression =FormatNumber(Sum(CDbl(Fields!budget.Value)) - ReportItems!tb_TOTAL2 .Value)
5. tb_Close -> calculate from tb_TOTAL3 - tb_Open
expression =FormatNumber(Code.GetClosing(ReportItems!tb_TOTAL3.Value,ReportItems!tb_Open.Value))
I want to calculate the value of tb_Open and tb_Close. I try to use custom code for calculate them. tb_close is correct but tb_Open is not correct that show value = 0 .
My custom code:
Dim Shared prev_close As Double
Dim Shared now_close As Double
Dim Shared now_open As Double
Public Function GetClosing(TOTAL3 as Double,NowOpening as Double)
    now_close = TOTAL3 + NowOpening
    prev_close = now_close
    Return now_close
End Function
Public Function GetOpening(Month as String,NowOpen as Double)
    If Month = "1" Then
        now_open = NowOpen
    Else
        now_open = prev_close
    End If
    Return now_open
End Function
Thanks alot for your help!
Regards
Panda A

JTable: Selecting rows in columns independently

Dear all,
I have a JTable with two columns. I want the user to be able to select cells in columns independently. At present, the entire row gets marked as selected. Is it possible at all to, for instance, select row1 1 to 3 in column 1 and rows 4 to 5 in column 2? If so, where's the switch? Thanks a lot in advance!
Cheers,
Martin

Are you trying to use a seperate table for each column.
Thats not a good idear.
Here is what you have to do.
1. Create a sub class of JTable
2. You will have to redefine how the selection is done so. You will need some sort of a collection to store the list of selected cells indexes
2.1 Selecting a cell is simply adding the coordinations of the cell to the selection
2.2 de selecting is just removing it from the collection.
2.3 Here is what you have to override
     setColumnSelectionInterval()
     setColumnSelectionInterval()
     changeSelection()
     selectAll()
     getSelectedColumns()
     getSelectedColumn()
     getSelectedRows()
     getSelectedRow() You migh also need few new methods such as
     setCellSelected(int row, int column, boolean selected);
     boolean isCellSelected(int row, int column);
     clearSelection();
     int[][] getSelectedCells();You will have to implement the above in terms of your new data structure.
3. Handle mouse events.
Ex:- when user cicks on a cell if it is already selected it should be deselected (see 2.2)
other wise current selected should be cleared and the clicked cell should be selected
if your has pressed CTRL key while clicking the the cell should be selected without deselecting the old selection.
---you can use above using a MouseListener
When the user hold down a button and move the mouse accross multiple cell those need to be selected.
--- You will need a MouseMotionListener for this
You might also need to allow selection using key bord. You can do that using a KeyListener
4. Displaying the selection
You have to make sure only the selected cells are high lighted on the table.
You can do this using a simple trick.
(Just override getCellEditor(int row, int column) and getCellRenderer(int row, int column) )
Here is what you should do in getCellRenderer(int row, int column)
public TableCellRenderer getCellRenderer(int row, int column)
TableCellRenderer realRenderer = super.getCellRenderer(int row, int);
return new WrapperRenderer(realRenderer,selectedCellsCollection.isCellSelected(row,column));
static class WrapperRenderer implements TableCellRenderer{
    TableCellRenderer realRenderer;
    boolean selected;
    public WrapperRenderer(TableCellRenderer realRenderer, boolean selected){
       this.realRenderer = realRenderer;
       this.selected = selected;
    public Component getTableCellRendererComponent(JTable table,
                                               Object value,
                                               boolean isSelected,
                                               boolean hasFocus,
                                               int row,
                                               int column){
        return realRenderer.getTableCellRendererComponent(table,value,selected,hasFocus,row,column);
}What the above code does is it simply created wrapper for the Renderer and when generating the rendering component it replaces the isSeleted flag with our on selected flag
and the original renderer taken from the super class will do the rest.
You will have to do the same with the TableCellEditor.
By the way dont use above code as it is becouse the getCellRenderer method create a new instance of WrapperRenderer every time.
If the table has 10000 cells above will create 10000 instances. So you should refine above code.
5. Finnaly.
Every time the selection is changes you should make the table rerender the respective cells in or der to make the changes visible.
I'll leave that part for you to figure out.
A Final word
When implementing th above make sure that you do it in the java way of doing it.
For the collection of selected cells write following classes
TableCellSelectionModel // and interface which define what it does
DefaultTableCellSelectionModel //Your own implementation of above interface the table you create should use thisby default
//To communicate the selection changes
TableCellSelectionModelListener
TableCellSelectionModelEventif you read the javadoc about similer classes in ListSelectionModel you will get an idear
But dont make it as complex as ListSelectionModel try to keep the number of methods less than 5.
If you want to make it completly genaric you will have to resolve some issues such as handling changes to the table model.
Ex:- Rows and colums can be added and removed in the TableModle at the run time as a result the row and column indexes of some cells might change
and the TableCellSelectionModel should be updated with those changes.
Even though the todo list is quite long if you plan your implementation properly the code will not be that long.
And more importantly you will learn lots more by trying to implementing this.
Happy Coding :)

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

How to set a JRadioButton as a column in a JTable

Hello Friends,
I need a help in JTable.
I want to have a Radio button as a column of a JTable.(The Other Columns should be Strings).
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Could you please give me a solution on this.
I would appreciate if u give me the code for this, as it is very urgent.
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Hi,
use a TableCellRenderer and CellEditor as described in http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
Propably you need to track the selected button yourself, e.g. by using an int value representing the row selected.

Show hidden columns in a JTable

Hi,
I have a requirement for hiding some columns of a JTable and showing them back based on user actions.
I have gone through some topics about hiding columns. which can be done by table.removeColumn();
But when I use table.addColumn(); it adds the column at the end of the table.It should add in the same location as the previous column.
How to show /reveal the hidden column back?.

* Hide_Columns.java
* This code contains a table model that allows you to
* specify the columns to be hidden in a boolean array.
* To use the model:
*       model = new MyTableModel(data, columnNames);
*       table.setModel(model);
* The most important method in the model is "getNumber()", which converts a column number
* into the number corresponding to the data to be displayed.
* Visible columns can be dynamically changed with
* model.setVisibleColumns(0, column0.isSelected());
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class Hide_Columns extends JFrame {
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        getContentPane().add(new JScrollPane(table), BorderLayout.CENTER);
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            columnX.setSelected(true);
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        getContentPane().add(toolBar, BorderLayout.NORTH);
        setSize(400,300);
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        model.setValueAt("test2",0,2);
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        visibleColumns[1] = true;
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int n = 0;
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return super.getValueAt(row, getNumber(column));
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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
~

Hiding columns of a JTable

I want to hide some of the columns of my JTable. Plz tell me how to do it?
Thanks in advance

Alternatively, remove those columns from the table's columnModel.Definitely the preferred approach.
Wouldn't you still have to modify the TableModel so that the getValueAt method doesn't return the wrong value?No, the view of the table is not necessarily the same as the order of the data in the TableModel. What happens, for example when a column of the table is reordered? Well, each TableColumn contains a reference to a specific column in the TableModel. So the TableColumnModel is used by the table to control the view of the table and the TableColumn will get the data from the correct column. This way you can reorder TableColumns or remove TableColumns withouth affecting the TableModel only the view of the table.
My FixedColumnScrollPane example uses this feature:
http://forum.java.sun.com/thread.jspa?forumID=257&threadID=500055
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a) Do you want the first column viewable in the table, then just use the column
b) Do you want the first column from the TableModel. In this case you have some helper methods (in case columns have been reordered or removed):
convertColumnIndexToModel()
convertColumnIndexToView()

Problem in updating first column header in JTable

hi
I am using JTable in my application. I want to change first column name of JTable every time when a JList is selected. I am using DefaultTableModel for JTable. I added first column in Constructor and another in a method. I have to edit only first column header. How can i do this???
I used this code but it is not working.
table.getColumnModel().getColumn(0).setHeaderValue("Name of column");
table.getTableHeader().resizeAndRepaint();
Your help will be appreciated.
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Sonal

table.getColumnModel().getColumn(0).setHeaderValue("Name of column");
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How to select a specific column in a bean method?

Hey everyone,
I'm trying to select a specific column in my adf table so i can hightlight the ones i can after, with a method bean that does a match from another table. I'm using JDeveloper 12.1.2.0.0.
Here's my table at the moment (its a static list that Timo and Alejandro helped me create, thanks to them again!):
<af:table value="#{bindings.Anos1.collectionModel}" var="row"
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                                                          inlineStyle="max-width:100%;" columnStretching="multiple"
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                                                               id="c54" width="16%">
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                                                    </af:column>
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                                                               filterable="true" sortable="false"
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                                                               id="c55" width="16%">
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                                                                       shortDesc="#{bindings.Anos1.hints.A2012.tooltip}"
                                                                       id="ot55">
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I've deleted some of the columns because they are all equal and by doing so, you have less problems in reading it.
In my method i have a matchEm but i'm trying to select a column by using this line:
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dimAnos is the binding for my table Anos (Years in Portuguese). I even tried another values fro the columnSelection but i couldn't make it selected. Am i doing anything wrong?
Please help me or give me an idea of how can i do this.
Regards,
Frederico.

Hi Frederico,
The method setColumnSelection is meant to set whether your table supports column selection or not. It doesn't select the column. In order to select the column, you need to set the column attribute Selected to true. So I don't know if its an option for you but you can create a binding to all the columns you have in you bean, and then call the method A2012.setSelected(true), and then add a partial target to the table to re render it and show the selected column.
Hope this helps

Selective reordering of columns in a Jtable

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