Reordering columns in JTable

I am reordering columns in a JTable, and then I refresh the view of the JTable, now the columns are moved back to the original position.
But I want the columns to be in the place where I moved even after refreshing the view. How do I do that?? plz with example.

When you add a TableModel to a table the TableColumnModel will be rebuilt based on the information in the TableModel. If your TableModel will always contain the same number of columns and same type of data in each column then you can do something like this:
JTable table = new JTable(....);
table.setAutoCreateColumnsFromModel(false);Then when you change the model you would do:
TableModel model = new DefaultTableModel(...);
table.setModel( model );

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How to reorder columns in JTable between sessions without serialization?

I have a situation where the column widths and names of a JTable are saved to DB(there is no serialization). Upon starting a new session, the JTable needs to be displayed with reordered column.
For example, let us say the default JTable has columns as A, B, C, D ...
The user rearranges the columns to B, A, D, C....
How do I tell JTable model to not use the default but the new values? Is serialization the only way?
Here is some sample code I use to set the widths. But what I really want to do is reorder columns by reading their names.
Thanks for your help
for(int i=0;i<count;i++) {
                    int width=(int)(ttsDefaults.getColumnWidth(i)*
                         DesktopEnvironment.getInstance().getDesktopRootFrame().getWidth());
                    sumWidth+=width;
                    treeTable.getColumnModel().getColumn(i).setPreferredWidth(width);
                    //treeTable.getColumnModel().getColumn(i).setWidth(width);
               }

Hi Jules,
You need a user with XDBADMIN rights to access the WebDav. Once you have access, you can open the URL as webfolder (in IE).
Regards,
Christian

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.

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 )
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               if (HowManyColDelete.length !=0)
                    TableColumnModel tableCModel = table.getColumnModel();
                    for (int i = HowManyColDelete.length-1; i>-1; i--)
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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();

Keyboard Access For a Column in JTable with default editor as JComboBox

I want to get Key board access for a column in JTable.
The user should be able to select from a drop down list for the column with default
editor set as JComboBox.
Presently,it works fine with mouse,also I am able to focus it with Keyboard using
ALT+Up keys,but how to make drop down list appear.
Plz help,it's urgent.
Thanks in Advance

Hi,
In addition to setting DO_SUM = 'X' you need to specify function in H_FTYPE field. It should be set to 'AVG' in your case.
ls_fielcat-do_sum = 'X'.
ls_fieldcat-h_ftype = 'AVG.

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)

Problem with Hiding Columns in JTable

Hi.
Who knows how to hide column in JTable.
I try to get column:
MyTab.getColumnModel().getColumn(i)But there is no methods like SetVisible(false)
What to DO???

http://www.google.com/search?hl=en&q=%2Bhide+%2Bcolumn+%2Bjtable&btnG=Google+Search

Programmatically Sorting columns in JTable

Hi,
How can I programmatically sort a particular column in JTable without having to click on column header.
Thanks.

to sort the desired column w/o click on header
int columnIndexToSort = 1;
RowSorter.SortKey sortKey = new RowSorter.SortKey(columnIndexToSort,SortOrder.ASCENDING);
ArrayList alist = new ArrayList(1);
alist.add(sortKey);
((DefaultRowSorter)table.getRowSorter()).setSortable(columnIndexToSort , true);
((DefaultRowSorter)table.getRowSorter()).setSortKeys(alist);
((DefaultRowSorter)table.getRowSorter()).sort();expecting dukestars..

Freezing columns in JTable.... - Need Suggestions!!!!!!!!!

Hai Friends,
i need suggestions for the following,
How to freeze the columns in swing JTable.?????????????
I need to freeze 3 columns in JTable... how it can be done?
eg: its like the option used in excel for freezing the panes. like that, i need to freeze the column in JTable. so that, it wont be scrolled while scrolling the records, it should also be done in colmns of jtable for horizontal scroll n row for vertical scroll. is this can be done in JTable. Can u pls help me out in this...?
Regards,
Ciya.

Did you actually try the code which was pointed out to you when you [url http://forum.java.sun.com/thread.jspa?threadID=701198]asked this question before? It does just what you want...

Hidden Columns in JTable

I wont to hide a elected column in JTable.
how it to do

TableColumnModel tcm = table.getColumnModel();
TableColumn column = tcm.getColumn( modelIndex );
tcm.removeColumn( column );
Next time, search the forum first. There are at least a dozen posts asking this question.

Show/hide a column in JTable

I want to show/hide columns in JTable
How is this possible
Note that columns that are hidden may be showed later
thanks in advance
Renjith

I tried out for this:TableColumn col = jTable.getColumnModel().getColumn( colnum );
if( col != null )
col.setPreferredWidth( 0 );
col.setMaxWidth( 0 );
}But the column seems to have minimum width which you can't even change with col.setMinWidth( 0 );

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.

To setup scrollbars for individual columns in JTable

Hi,
I need to setup individual scrollbars for the
columns in JTable.
Can anybody help?
Thanks in advance.
Rgds,
sita

Hi,
I need to setup individual scrollbars for the
columns in JTable.If i understand you correctly, you want to have a scrollbar for every column. If so, you will need a new instance of JTable and JScrollPane for every column, but that's a lot of work if you want to do it fancy.
The good news, is you can reuse the table model.
You could do something like that.
for (int i= 0; i < model.getColumnCount(); i++) {
    JTable table = new JTable();
    table.setAutoCreateColumnsFromModel(false);
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    TableColumn tc = new TableColumn(i, 120);
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Can anybody help?
Thanks in advance.
Rgds,
sita

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I have see a lots of examples of whow to create fix column into JTable.
But all the examples have the same problems.
When I wont to scroll over the fix column the vertical scroll bar of the no fix column dont move, so the no fix column dose not move and the fix columns and no fix columns aren?t alined.
If sameone have same example, send it please !!!!
Thanks !!!
Pablo

In a recent project I've had the same problem.
After a long research at the Swing forum at java.sun.org and google I found out that
1. Currently there is no proper Open Source solution
2. All the postings at sun are good concepts, but far away from solutions
3. The only (for me )acceptable commercial solution is the JCTable from Quest (formerly KGroup)
Since I want to have full control over the source code of the table, I decided to collect all the tips from this forums and write my own table.
Here is a first try:
http://jroller.com/resources/kriede/CoolTable.java
The main idea is to have two tables, one for the locked columns (= fixed columns = frozen columns) and one for the scrollable columns. With all the tips from this forum it was more or less a puzzle to make it work pretty.

Reordering columns in JTable

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