Adding/removing columns in jtable

Hello everyone,
i was looking for a way to add/remove columns from a jtable. The way i envision it working is... Initially have a predefined number of columns, of these only show the user say 5 of those on startup. but then provide a drop down (or list box etc) of the other column headings, so that when the user selects one... it adds it to the jtable. also to remove ..... is there a way to have a pop-up when the user right-clicks the table header and put a option to remove that column there? if not what is the best way to trigger a remove of a column? So i need a way to keep track of all the columns in case the user wants to add it again. anyone know how this can be done or any part of it?

I need a intutive way for the user to remove a column from the gui (like with adding could be a dropdown box with column headers as labels).Create a custom ComboBoxModel. This model would simply contain TableColumns and display the header value in the combo box. The first combo box would display the currently showing columns. When you click on an item in the combo box:
a) remove the TableColumn from the TableColumnModel
b) remove the TableColumn from the model
c) add the TableColumn to the "hidden" combo box model
The same basic logic (but in reverse) would then apply when you click on the "hidden" combo box.

Similar Messages

Add and remove columns from JTable

Help me please!
A try to remove column from JTable. It's removed, but when I try to add column in table, then I get all old (removed early) columns + new column....
I completely confused with it.....
Here is my code for remove column:
class DelC implements ActionListener
          public void actionPerformed (ActionEvent e )
               int [] HowManyColDelete = table.getSelectedColumns();
               if (HowManyColDelete.length !=0)
                    TableColumnModel tableCModel = table.getColumnModel();
                    for (int i = HowManyColDelete.length-1; i>-1; i--)
                         table.getColumnModel().removeColumn (tableCModel.getColumn (HowManyColDelete [ i ]));
               else
                      JOptionPane.showMessageDialog(JOptionPane.getRootFrame(), "Column is not selected!");
     }

It's little ex for me, I just try understand clearly how it's work (table models i mean). Here is code. All action with tables take place through menu items.
My brain is boiled, I've try a lot of variants of code, but did't get right result :((
It's code represent problem, which I've describe above. If you'll try remove column and then add it again, it will be ma-a-a-any colunms...
I understand, that my code just hide columns, not delete from table model....
But now I have not any decision of my problem...
Thanks a lot for any help. :)
import javax.swing.*;
import java.awt.*;
import javax.swing.table.*;
import java.awt.event.*;
import javax.swing.table.DefaultTableModel;
class JTableF extends JFrame
     Object [] [] data = new Object [0] [2];
     JTable table;
     DefaultTableModel model;
     String [] columnNames = {"1", "2"};
     TableColumnModel cm;
     JTableF()
          super("Table features");
          setDefaultLookAndFeelDecorated( true );
          setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
          JMenuBar MBar = new JMenuBar();
          JMenu [] menus = {new JMenu("A"), new JMenu("B")};
          JMenuItem [] menu1 = {new JMenuItem("Add row"), new JMenuItem("Delete row", 'D'), new JMenuItem("Add column"), new JMenuItem("Delete column")};
          menu1 [ 0 ].addActionListener(new AddL());
          menu1 [ 1 ].addActionListener(new DelL());
          menu1 [ 2 ].addActionListener(new AddC());
          menu1 [ 3 ].addActionListener(new DelC());
          for (int i=0; i<menu1.length; i++)
               menus [ 0 ].add( menu1 [ i ]);
          for (int i=0; i<menus.length; i++)
               MBar.add(menus );
          JPanel panel = new JPanel ();
          model = new DefaultTableModel( data, columnNames );
          table = new JTable (model);
          cm = table.getColumnModel();
          panel.add (new JScrollPane(table));
          JButton b = new JButton ("Add row button");
          b.addActionListener(new AddL());
          panel.add (b);
          setJMenuBar (MBar);
          getContentPane().add(panel);
          pack();
          setLocationRelativeTo (null);
          setVisible (true);
     class DelC implements ActionListener
          public void actionPerformed (ActionEvent e )
               int [] HowManyColDelete = table.getSelectedColumns();
               if (HowManyColDelete.length !=0)
                    TableColumnModel tableCModel = table.getColumnModel();
                    for (int i = HowManyColDelete.length-1; i>-1; i--)
                         int vizibleCol = table.convertColumnIndexToView(HowManyColDelete [ i ]);
                         tableCModel.removeColumn (tableCModel.getColumn (vizibleCol));
                    //cm = tableCModel;
               else
                    JOptionPane.showMessageDialog(JOptionPane.getRootFrame(), "Column is not selected!");
     class AddC implements ActionListener
          public void actionPerformed (ActionEvent e)
               //table.setColumnModel(cm);
               Object NewColumnName = new String();
               NewColumnName = JOptionPane.showInputDialog ("Input new column name", "Here");
               int i = model.getRowCount();
               int j = model.getColumnCount();
               Object [] newData = new Object [ i ];
               model.addColumn ( NewColumnName, newData);
     class AddL implements ActionListener
          public void actionPerformed (ActionEvent e)
               int i = model.getColumnCount();
               Object [] Row = new Object [ i ];
               model.addRow ( Row );
     class DelL implements ActionListener
          public void actionPerformed (ActionEvent e)
               int [] HowManyRowsDelete = table.getSelectedRows();
               if (HowManyRowsDelete.length !=0)
                    for (int k = HowManyRowsDelete.length-1; k>-1; k--)
                         model.removeRow (HowManyRowsDelete[k]);
               else
                    JOptionPane.showMessageDialog(JOptionPane.getRootFrame(), "Row is not selected!");
     public static void main (String [] args)
          javax.swing.SwingUtilities.invokeLater(new Runnable()
               public void run()
                    JTableF inst = new JTableF();

Customizing Audit Log Report - Adding/Removing Columns from Display

Hi All -
Has anyone tried adding/removing the columns from Out of Box Auditi Log report with minor customizations to the code/configuration files ? Right now , when the Audit Log report is executed, there are numbe of columns that appear on report (Server, Client IP etc) which are too technical for the client and requirement is remove some of these and add some more for the attributes that we are audit logging through Audit workflow service. If you have done something similar in the past, please provide me with some inputs. Any sample code, examples will be highly appreciated.

Hello Gurus,
I also have same kind of requirement.WE have to send a monthly report to customer where number of users created and deleted to be given to them.
Its urgent.Please help
Thanks in advance

Dynamically adding a column to a jtable - simple & urgent

I am new to using JTables.
I have read the tutorial and looked at several examples, but I am still confused as to how to add/remove columns and how to add rows to the table.
I want to have a totally dynamic table which will allow me to add/remove columns and to add rows.
The table gets the data to be displayed (and the column header values) from an outside object. I thought about writing my own table model.
Here is the code for my simple table model:
import javax.swing.table.*;
import java.util.Vector;
public class MyTableModel extends AbstractTableModel{
   private Vector columnHeaders;
   private Vector data;
   // simple constructor
   public MyTableModel() {
      columnHeaders = new Vector();
      data = new Vector(); // data is a vector of vectors
   public int getColumnCount() {
      return columnHeaders.size();
   public int getRowCount() {
      if (data.size() == 0) {
          return 0;
      Vector columnData = (Vector)data.elementAt(0);
      return columnData.size();
   public Object getValueAt(int row, int column) {
      Vector columnData = (Vector)data.elementAt(column);
      return columnData.elementAt(row);
   // the method I call for dynamically adding a new empty column
   public void addNewEmptyColumn(String value) {
       columnHeaders.add(value);
       fireTableStructureChanged();
}Here is how I use the table model with my table
import javax.swing.*;
public class Demo extends JFrame{
    private JTable table;
    public Demo() {
        super("test");
        table = new JTable(new MyTableModel());
        getContentPane().add(table);
        pack();
        show();
    public void addColumn(String value) {
        MyTableModel model = (MyTableModel)table.getModel();
        model.addNewEmptyColumn(value);
    public static void main(String[] args) {
        Demo demo = new Demo();
        // here I am trying to add columns...
        demo.addColumn("one");
        demo.addColumn("two");
}I try to add columns, but nothing happens!!!
What am I doing wrong?
I would appreciate if someone who take himself/herslef to be a JTable expert could give me his/her e-mail and this way I won't bother the rest of the world with my stupid JTable questions...
Sincerely
Nir

I have another question.
What if I want to render the table headers in a certain way.
I would like to use:
TableColumn's setHeaderRenderer(TableCellRenderer headerRenderer).
But in order to do it, I need to get a TableColumn.
How do I get it from the model?
I thought about subclassing JTable and overriding:
public void tableChanged(TableModelEvent e)that function is called everytime I invoke fireTableStructureChanged().
In that function, I am assuming that a column has been added, however, when I query for JTable's getColumnCount(), I keep getting 0!

How To Delete Columns In JTable?

Hi,
I created a JTable and added values through DefaultTableModel. I Have JButton to add columns if need. I have another JButton to remove columns by entering the columns header.. eg: If there are three columns like A,B,C, If i need to remove column "C" means. I just click the remove button and enter the column header in the dilaog box eg: "C". and the columns will deleted. It is working properly. but if i add a new column means the removed columns also getting added and the datas are also in that same column. how delete a column and it's data in a single shot.
How to add network drivers in a save as dialog box. I have using my code in Windows and also in mac os.
Thanks in Advance
by,
Mohan

One possibility would be to use a DefaultTableModel to store the data but have JTable access it through your own table model which mapped the columns and altered the column count etc..Why go to all that trouble. If you just want to hide a column, then remove the TableColumn from the TableColumnManager.
The requirement was to remove the data as well.
Implementing AbstractTableModel is really less hassle than it looks. Generally you only have to override getColumnName, getValueAt, getRowCount, getColumnCount and (usually) getColumnClass.Nobody said it was difficult, by why reimplement everything from scratch? Just extend DTM to add your new functionality.

Problem in adding/deleting rows in JTable

I am trying to add /remove rows from JTable whose first column is JButton and others are JComboBox's.If no rows are selected,new row is added at the end.If user selects some row & then presses insert button,new row is added below it.Rows can only be deleted if user has made some selection.Kindly help me,where i am making mistake.If any function is to be used.My code is as follows....
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;
public class JButtonTableExample extends JFrame implements ActionListener{
JComboBox mComboLHSType = new JComboBox();
JComboBox mComboRHSType = new JComboBox();
JLabel mLabelLHSType = new JLabel("LHS Type");
JLabel mLabelRHSType = new JLabel("RHS Type");
JButton mButtonDelete = new JButton("Delete");
JButton mButtonInsert = new JButton("Insert");
JPanel mPanelButton = new JPanel();
JPanel mPanelScroll = new JPanel();
JPanel mPanelCombo = new JPanel();
DefaultTableModel dm ;
JTable table;
int currentRow = -1;
static int mSelectedRow = -1;
public JButtonTableExample()
super( "JButtonTable Example" );
makeForm();
setSize( 410, 222 );
setVisible(true);
private void makeForm()
this.getContentPane().setLayout(null);
mPanelCombo.setLayout(null);
mPanelCombo.setBorder(new LineBorder(Color.red));
mPanelCombo.setBounds(new Rectangle(1,1,400,30));
mLabelLHSType.setBounds(new Rectangle(26,5,71,22));
mComboLHSType.setBounds(new Rectangle(83,5,100,22));
mLabelRHSType.setBounds(new Rectangle(232,5,71,22));
mComboRHSType.setBounds(new Rectangle(292,5,100,22));
mPanelCombo.add(mLabelLHSType,null);
mPanelCombo.add(mComboLHSType,null);
mPanelCombo.add(mLabelRHSType,null);
mPanelCombo.add(mComboRHSType,null);
mPanelScroll.setLayout(null);
mPanelScroll.setBorder(new LineBorder(Color.blue));
mPanelScroll.setBounds(new Rectangle(1,28,400,135));
mPanelButton.setLayout(null);
mPanelButton.setBorder(new LineBorder(Color.green));
mPanelButton.setBounds(new Rectangle(1,165,400,30));
mButtonInsert.setBounds(new Rectangle(120,5,71,22));
mButtonDelete.setBounds(new Rectangle(202,5,71,22));
mButtonDelete.addActionListener(this);
mButtonInsert.addActionListener(this);
mPanelButton.add(mButtonDelete,null);
mPanelButton.add(mButtonInsert,null);
dm = new DefaultTableModel();
//dm.setDataVector(null,
//new Object[]{"Button","Join","LHS","Operator","RHS"});
dm.setDataVector(new Object[][]{{"","","","",""}},
new Object[]{"","Join","LHS","Operator","RHS"});
table = new JTable(dm);
table.getTableHeader().setReorderingAllowed(false);
table.setRowHeight(25);
int columnWidth[] = {20,45,95,95,95};
TableColumnModel modelCol = table.getColumnModel();
for (int i=0;i<5;i++)
modelCol.getColumn(i).setPreferredWidth(columnWidth);
//modelCol.getColumn(0).setCellRenderer(new ButtonRenderer());
//modelCol.getColumn(0).setCellEditor(new ButtonEditor(new JCheckBox()));
modelCol.getColumn(0).setCellRenderer(new ButtonCR());
modelCol.getColumn(0).setCellEditor(new ButtonCE(new JCheckBox()));
modelCol.getColumn(0).setResizable(false);
setUpJoinColumn(modelCol.getColumn(1));
setUpLHSColumn(modelCol.getColumn(2));
setUpOperColumn(modelCol.getColumn(3));
setUpRHSColumn(modelCol.getColumn(4));
JScrollPane scroll = new JScrollPane(table);
scroll.setBounds(new Rectangle(1,1,400,133));
mPanelScroll.add(scroll,null);
this.getContentPane().add(mPanelCombo,null);
this.getContentPane().add(mPanelScroll,null);
this.getContentPane().add(mPanelButton,null);
}//end of makeForm()
public void actionPerformed(ActionEvent ae)
if (ae.getSource() == mButtonInsert)
//int currentRow = table.getSelectedRow();
currentRow = ButtonCE.selectedRow;
System.out.println("Before Insert CURRENT ROW"+currentRow);
if(currentRow == -1)
int rowCount = dm.getRowCount();
//mSelectedRow = rowCount-1;
//table.clearSelection();
dm.insertRow(rowCount,new Object[]{"","","","",""});
currentRow = -1;
ButtonCE.selectedRow = -1;
else
table.clearSelection();
dm.insertRow(currentRow+1,new Object[]{"","","","",""});
currentRow = -1;
ButtonCE.selectedRow = -1;
//System.out.println("After INSERT CURRENT ROW"+currentRow);
if(ae.getSource() == mButtonDelete)
//int currentRow = table.getSelectedRow();
currentRow = ButtonCE.selectedRow;
System.out.println("Before DELETE CURRENT ROW"+currentRow);
if(currentRow != -1)
dm.removeRow(currentRow);
table.clearSelection();
currentRow = -1;
ButtonCE.selectedRow = -1;
//System.out.println("Selected Row"+mSelectedRow);
else
JOptionPane.showMessageDialog(null, "Select row first", "alert", JOptionPane.ERROR_MESSAGE);
//System.out.println("DELETE CURRENT ROW"+currentRow);
public void setUpJoinColumn(TableColumn joinColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("AND");
comboBox.addItem("OR");
comboBox.addItem("NOT");
joinColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
joinColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = joinColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpLHSColumn(TableColumn LHSColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Participant1");
comboBox.addItem("Participant2");
comboBox.addItem("Variable1");
LHSColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
LHSColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = LHSColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpOperColumn(TableColumn operColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("=");
comboBox.addItem("!=");
comboBox.addItem("Contains");
operColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
operColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = operColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public void setUpRHSColumn(TableColumn rhsColumn)
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Variable1");
comboBox.addItem("Constant1");
comboBox.addItem("Constant2");
rhsColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
rhsColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = rhsColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
public static void main(String[] args) {
JButtonTableExample frame = new JButtonTableExample();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
//Button as a renderer for the table cells
class ButtonCR implements TableCellRenderer
JButton btnSelect;
public ButtonCR()
btnSelect = new JButton();
btnSelect.setMargin(new Insets(0,0,0,0));
public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column)
if (column != 0) return null; //meany !!!
//System.out.println("Inside renderer########################Selected row");
//btnSelect.setText(value.toString());
//btnSelect.setIcon(new ImageIcon("capsigma.gif"));
return btnSelect;
}//end fo ButtonCR
//Default Editor for table
class ButtonCE extends DefaultCellEditor implements ActionListener
JButton btnSelect;
JTable table;
//Object val;
static int selectedRow = -1;
public ButtonCE(JCheckBox whoCares)
super(whoCares);
//this.row = row;
btnSelect = new JButton();
btnSelect.setMargin(new Insets(0,0,0,0));
btnSelect.addActionListener(this);
setClickCountToStart(1);
public Component getTableCellEditorComponent(JTable table,Object value,boolean isSelected,int row,int column)
if (column != 0) return null; //meany !!!
this.selectedRow = row;
this.table = table;
table.clearSelection();
System.out.println("Inside getTableCellEditorComponent");
return btnSelect;
//public Object getCellEditorValue()
//return val;
public void actionPerformed(ActionEvent e)
// Your Code Here...
System.out.println("Inside actionPerformed");
System.out.println("Action performed Row selected "+selectedRow);
btnSelect.setIcon(new ImageIcon("capsigma.gif"));
}//end of ButtonCE

Hi,
All the thing you have to do is to return a boolean for the column. JTable will use a checkbox (as default) to show boolean values.

AddColumn() make removed column visible again. Pls help. :)

I have a JTable which I need to remove and add column.
// declaration of table and tablemodel
DefaultTableModel tableMod = new DefaultTableModel (data, col);
// data is Object[][] type, col is String[] type
myTable = new JTable(defaultTableModel );
DefaultTableColumnModel columnMod = (DefaultTableColumnModel)myTable.getColumnModel();
My remove column code is :
columnMod.removeColumn(columnMod.getColumn(1));
My add column code is :
tableMod.addColumn("three");
My problem is : say my table has 2 columns initially
"one" "two"
after removeColumn(), the column will disappear from the JTable. like this
"one"
but when I addColumn() later, the removed column will appear again. like this
"one" "two" "three"
I think the problem is DefaultTableColumnModel is used to removeColumn but DefaultTableModel is used to addColumn, resulted in some kind of discrepancy, how to go about this? I know I can do perform addColumn() and removeColumn() on JTable, something like :
remove -
myTable.removeColumn(myTable.getColumnModel().getColumn( myTable.getSelectedColumn() ) );
add -
addedColumn = new TableColumn()
myTable.addColumn(addedColumn);
But when I do this addedColumn has a modelIndex of 0 , and anychanges to addedColumn will be reflected on first column(because modelIndex is 0) as well...which is what I don't want.
Hope I'm making sense, any help appreciated.

Ok, so heres my gripe with actually removing a column from a JTable : A JTable rebuilds its entire column model when it gets certain events (e.g. if the table model calls fireTableStructureChanged). This makes it unreliable to remove columns from the table by the method you give (though im not saying it cant be done, feel free to pursue that avenue if you like). Im just saying a more reliable way to do it is to have you own table model that knows exactly what the columns are to be in the JTable at any time. This way if the JTable rebuilds it column model it wont remake a column you removed.
So heres the basics of removing and adding a column by changing the table model :
A table model (derived from AbstractTableModel) needs to have three functions:
public int getRowCount();
public int getColumnCount();
public Object getValueAt(int row, int column);So if you're at a time when you only want one column, getColumnCount() should return 1. If you want to say add two columns, then have getColumnCount() return 3. You would then also need to change what gets returned by getValueAt() so that it tells what is in the three columns appropriately. Also, whenever the number of columns is changed, you would need to fireTableStructureChanged(), to let the table know to rebuild it column model, with or without the columns you want added/removed.
That is exactly what is done in the other post. I don't mean to not directly answer your question, i just don't think that removing and adding columns like that is how JTable is meant to be used, in MVC architechure. I dont really have any information about adding and removing columns because I've never even attempted to change a table that way. All i can say to that is that you have to figure out how JTable works, which I would try putting tons of System.out() calls telling me exactly what the column model looks like after certain changes(it indexes, etc..).
Well i hope this helps in some small way...
Josh

Serial number column in Jtable

Apologies for this distraction.
I read at this forum about a year ago how to add a s/n column in Jtable such that all the nos are automatically updated/adjusted when a row is added/deleted. the count starts from the top down serially and unaffected by sorting.
pls help!

thanks a million BaltimoreJohn and especially camickr whose solutions to problems have been most helpful. applying the referenced post, i worked around the problem by resetting the values of the column having the serial number, based on table rowCount every time there is an operation on it(deleting, addition etc)

Is it possible to see list history (e.g: which user removed column from list)

Hello there,
I know it is possible to see version history of items and pages, but what about the lists itself?
For example:
Is it possible to see which user added/removed a column from a list?
Is it possible to see which user changed a certain view from a list?
Thanks in advance!

There's an auditing event fired when a user modifies content types or columns in a list. To make use of this you'll need to enable auditing if it's not already enabled.
I'm not sure about the view and I'm having trouble trying to find information about it because most of the documentation talks about VIEWing the audit reports. :)
Jason Warren
@jaspnwarren
jasonwarren.ca
habaneroconsulting.com/Insights

Hide a column in JTable

Dear all,
I want to hide a column in JTable object, I already tried resize it to 0 but the effect is not good, I also cannot remove the column, since I need this column for other process.
So, any other good idea besides resizes and remove?
Thank you very much!

I have tried that too, but the column isn't hide, the size is not actually come to 0,...That's because JTable has a default minimum width of 15.... if you want to hide the column, you must set the minwidth as well. For example:
myTable.getColumnModel().getColumn(column_to_hide).setMinWidth(0);
myTable.getColumnModel().getColumn(column_to_hide).setPreferredWidth(0);;o)
V.V.

Removed column on Answers

Hi experts! Sometimes...I have a problem when I do a reports with "combine with similar requests" and add Auxiliar column to get conditional format colour...
I have this tables normally, adding some dimensions, measures...and sometimes...when I save my report and I come back to edit something...I see that I can't modify data format for example (in a measure) or conditional format is: Removed column is equal to green or red... So my reports works fine on dashboard but I can't modify format...for example if I must to change a name of column I can't because when I save and go to dashboards I see this error:
View Display Error
Invalid Handle Of 'PKN3saw17WebValueFormatterE' Exception
Error Details
Error Codes: Q4NU7XSN
Only if I change something of format report I see this error!!! If I change a formula on criteria, works fine...but in this case I have to change a column label and I don't want to begin my report again to get it.
Anybody can tell me how can avoid this "removed column" ???
Thank you!!

By legacy date i mean target resolution date
***Don't forget to mark helpful or answer***

Adding a column to a DB table with CMP entities

Morning all.
I've been asked whether adding a column to a database table will break the CMP entity bean (EJB2) associated with the table. I suspect that it won't and that the new field will be ignored. Another developer here says that it will no longer compile (I can't see how this could be the case but still...) and I can find no evidence to either refute or corroborate either position.
Can anyone tell me for definite - if we add a column to a database table mapped to a CMP entity bean, will we HAVE to update the bean, or can we leave it ignorant of the new column?
(For the purposes of the question, please assume that the column has no constraints i.e. can be null etc.)
Thanks in advance
-- kaideejee
Message was edited by kaideejee : CMB entities? What are they? Typo fix.

Well alterations(adding / removing a column) to the
table should be made available to the bean
irrespective of the persistance(CMP OR BMP) or normal
bean with your own methods that depicts the
behaviour.
reason is simple: probably bean may/may not contain
the corresponding setter or getter or finder methods
related to the ALTERED TABLE(NEW COLUMN)The reason for what is simple? Sorry I may have missed your point there. Are you saying that it's correct practice to make it available to the bean, or that it will be made available behind the scenes, subject to getters/setters being created?
Assuming we choose not to create these getters and setters (we have a horrible hybrid monster which uses stored procedures for some things and EJB for others, so it's feasible that the EJB end may not need to see some fields used by other parts) would the entity beans continue to play nicely with the database rows, or would the additional columns throw it completely?
Cheers
-- kaideejee

Problem while inserting new Column in JTable

Hi,
I am facing Problem while inserting new Column in JTable.
I have a JTable with one inherited ColumnModel class.
When I am adding the column and moving towards the corresponding location, it moves successfully.
but if I am adding another column or making any changes to table column structure the table retains the defualtcolumn structure.
please help me to solve this..
Regards
Ranjith.........

Maybe this example will help:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=579527

Hiding a column in jtable made from DefaultTableModel.

I have made my jtable from DefaultTableModel.
I want to keep one column in the jtable as hidden storing some data containing neccessary information like the "path of the file"
which need not be shown to the user.
Please tell me how I can hide one column in the Jtable.
please provide siome link or code for the same.
Tia,
Sarwa

dayanandabv wrote:
[http://search.sun.com/search/onesearch/index.jsp?qt=hide+column%2B+JTable&rfsubcat=&col=developer-forums]
My thought exactly.
db

How to set different renderers to different cells in same column of JTable?

Hello Friends,
I need your help again...
Does any body knows, how to set different renderer's for different cells of same column in JTable..??
For ex.
Col1 Col2 Col3 Col4
A       A       A      A
A       A       A      B
A       A       A      C
A       A      A       D
Where A B C D would be different Renderers. I want set exactly same ,,, ie. one column with different renderer at different cell positions..
Right now i m setting renderer using statement bellow :
table.getColumnModel().getColumn(int).setCellRenderer(rederer_Instance);But with this, effect in the last renderer is applicable whole column....
Can any body help me out ?????????
please refer this thread for similar kind of discussion...
http://forums.sun.com/thread.jspa?forumID=57&threadID=571445Thanks
Suyog

Please refer to the first reply of [this thread|http://forums.sun.com/thread.jspa?forumID=57&threadID=571445] for the answer. If you have a specific problem implementing it, post you code with a specific question.

Adding/removing columns in jtable

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