Set JTable column width

Hi,
I would like to set the column width of JTable.
========================================
JTable table;
DefaultTableModel tableModel;
tableModel = new DefaultTableModel();
table = new JTable( tableModel);
JScrollPane scrollPane = new JScrollPane(table);
for(int i = 0; i < heading.length; i++)
tableModel.addColumn( heading[ i ]);
========================================

Did you run the tutorial code? Did it work?
Now compare the tutorial code with your code to determine what is different.
We can't tell you what is different based on the one line of code you posted:
colModel.getColumn(i).setPreferredWidth(100);

Similar Messages

How to set jtable column width

Hello..
I 'm using a simple jtable with the default model. I just want to set each column size to make table smaller Is this possible?
Thanks
Feras

newdeveloper wrote:
Hello..
I 'm using a simple jtable with the default model. I just want to set each column size to make table smaller Is this possible?
Thanks
FerasI think that your problem probably has more to do with the Layout you're using (or not using) than it does with individual column sizes. What layout are you using?
What happens when you set the size (or preferredSize, minimumSize, and maximumSize) on the whole JTable?
You might also be looking for JTable.[getColumnModel()|http://download-llnw.oracle.com/javase/6/docs/api/javax/swing/JTable.html#getColumnModel%28%29].[getColumn()|http://download-llnw.oracle.com/javase/6/docs/api/javax/swing/table/TableColumnModel.html#getColumn%28int%29].[setPreferredWidth()|http://download-llnw.oracle.com/javase/6/docs/api/javax/swing/table/TableColumn.html#setPreferredWidth%28int%29].
If none of those approaches work, post an SSCCE that demonstrates the problem.
PS- Swing questions belong in the Swing forum.

Setting the jTable column width

Coming from VB6 to Java is hard for me. Syntax is so much different.
Below is what I am doing to populate the jTable and the values are coming from MySQL. My problem is setting the column width but I am having difficult understanding how to do it. I looked on the website and downloaded some examples and clearly because I am new and I simply do not understand it. I was wonder if someone is willing to modify the codes below on how I should do it. Thanks
private void populate_grid(){
Vector dataVector = new Vector();
Vector columnVector = new Vector();
columnVector.add("ID#");
columnVector.add("Account Description");
columnVector.add("Contact");
columnVector.add("State");
while (myResult.next()) {
Vector rowVector = new Vector();
System.out.println(myResult.getString("acct_name"));
rowVector.add(myResult.getString("cust_id"));
rowVector.add(myResult.getString("acct_name"));
rowVector.add(myResult.getString("main_contact"));
rowVector.add(myResult.getString("main_state"));
dataVector.add(rowVector);
jTable1.setModel(new javax.swing.table.DefaultTableModel(dataVector, columnVector));

    int rows = 3;
    int cols = 3;
    JTable table = new JTable(rows, cols);
    // Disable auto resizing
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    // Set the first visible column to 100 pixels wide
    int vColIndex = 0;
    TableColumn col = table.getColumnModel().getColumn(vColIndex);
    int width = 100;
    col.setPreferredWidth(width);

Setting exact    jtable column width

I need to set each column width in table 200. Columns are added dynamically. And after one column added the previous one width is become small(about 75).
There is test code. Please, help, here is last place I can find the answer.
package visual.jtable;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;
import javax.swing.table.DefaultTableCellRenderer;
import java.awt.*;
import java.io.File;
import java.util.Arrays;
import java.util.List;
import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;
public class TestFrame extends JFrame
    public JTable table;
    public TestFrame()
        super("Test frame");
        createGUI();
    public void createGUI()
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        table = new JTable();
        table.setBounds(400, 400, 700, 300);
        JScrollPane pane = new JScrollPane(table);
        System.out.println(pane.getLayout().getClass().toString());
        pane.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        pane.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        panel.add(pane, BorderLayout.CENTER);
        getContentPane().add(panel);
    static int lastCol = -1;
    static int lastRow = -1;
    static int visibleRows = 13;
    public static void addFile(JTable table, File file)
        DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
        if (lastRow == visibleRows - 1 || lastCol == -1)
            TableColumnModel cm = table.getColumnModel();
            table.getTableHeader().setResizingAllowed(false);
            table.setAutoscrolls(true);
            table.setMaximumSize(new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE));
            tableModel.addColumn(String.valueOf(lastCol + 1), new File[visibleRows]);
            int index = tableModel.findColumn(String.valueOf(lastCol + 1));
            cm.getColumn(index).setMinWidth(200);
            cm.getColumn(index).setMaxWidth(200);
            cm.getColumn(index).setWidth(200);
            cm.getColumn(index).setPreferredWidth(200);
            cm.getColumn(index).setResizable(false);
            System.out.println("width = " + cm.getColumn(index).getWidth());
            System.out.println(table.getAutoResizeMode());
            lastCol++;
            lastRow = -1;
        lastRow++;
        tableModel.setValueAt(file, lastRow, lastCol);
    public static void main(String[] args) throws Exception
        JFrame.setDefaultLookAndFeelDecorated(true);
        try
            UIManager.setLookAndFeel(new WindowsLookAndFeel());
        catch (Exception e)
        TestFrame frame = new TestFrame();
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        List<File> f = Arrays.asList(FileSystemView.getFileSystemView().getFiles(new File("C:\\Documents and Settings\\Admin\\Рабочий стол"), false));
        for (File file : f)
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
            addFile(frame.table, file);
            Thread.sleep(100);
class ListViewTableCellRenderer2 extends DefaultTableCellRenderer
   // public ListViewTableCellRenderer(){}
    // implements javax.swing.table.TableCellRenderer
    public Component getTableCellRendererComponent(
            JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
        Component component = super.getTableCellRendererComponent(
                table, value, isSelected, hasFocus, row, column);
        File file = (File) value;
        JLabel label = (JLabel) component;
        label.setMinimumSize(new Dimension(200, label.getHeight()));
        label.setMaximumSize(new Dimension(200, label.getHeight()));
        label.setPreferredSize(new Dimension(200, label.getHeight()));
        label.setSize(200, label.getHeight());
        label.setMinimumSize(new Dimension(200, label.getHeight()));
        label.setText("<table width=\"200\">" +
                " <tr>" +
                "    <td>Month</td>" +
                " </tr>" +
                "</table>");
        if(file == null)
            label.setIcon(null);
            return label;
        //label.setIcon(ViewManager.getCachedIcon(file));
          label.setIcon(FileSystemView.getFileSystemView().getSystemIcon(file));
        if(file.isHidden())
           label.setText("<html><font color = \"red\">" + file.getName() + "</font></html>");
        label.setText(file.getName());
        label.setText("<table width=\"200\">" +
                " <tr>" +
                "    <td>Month</th>" +
                " </tr>" +
                "</table>");
        return label;
}

And after one column added the previous one width is become small(about 75).The model.addColumn() method causes a fireTableStructureChanged event to be generated which causes the TableColumns to be recreated and therefore they default back to their default sizes.
So you need to prevent the columns from being recreated. You do this by adding:
JTable table = new JTable(....);
table.setAutoCreateColumnsFromModel(false);But now you are responsible for adding table columns to the table manually. So your code would be something like;
int index = model.getColumnCount();
model.addColumn(...);
TableColumn tc = new TableColumn(index);
tc.setHeaderValue("" + index);
table.addColumn( tc );

Can't set custom column widths in JTable

I'm trying to set custom columns widths. They are set as I wish but then they are reset to default values (all columns have the same size). This is caused by method JFrame.setVisible(true) which invokes JTree.setWidthsFromPreferredWidths(). It can be investigated from following stack trace printed when a column being resized (see below).
How to prevent this auto width sizing?
P.S. can't override JTable.setWidthsFromPreferredWidths(); seems it's private
table = new JTable(model) {
     public void columnMarginChanged(ChangeEvent event) {
          new Exception("stack trace").printStackTrace();
          super.columnMarginChanged(event);
// setting here custom columns widths via table column model ...java.lang.Exception: stack trace
     at mtu.gui.TrackList$1.columnMarginChanged(TrackList.java:30)
     at javax.swing.table.DefaultTableColumnModel.fireColumnMarginChanged(DefaultTableColumnModel.java:615)
     at javax.swing.table.DefaultTableColumnModel.propertyChange(DefaultTableColumnModel.java:679)
     at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:264)
     at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(SwingPropertyChangeSupport.java:232)
     at javax.swing.table.TableColumn.firePropertyChange(TableColumn.java:249)
     at javax.swing.table.TableColumn.firePropertyChange(TableColumn.java:255)
     at javax.swing.table.TableColumn.setWidth(TableColumn.java:482)
     at javax.swing.JTable$2.setSizeAt(JTable.java:2242)
     at javax.swing.JTable$5.setSizeAt(JTable.java:2336)
     at javax.swing.JTable.adjustSizes(JTable.java:2372)
     at javax.swing.JTable.adjustSizes(JTable.java:2340)
     at javax.swing.JTable.setWidthsFromPreferredWidths(JTable.java:2250) <======
     at javax.swing.JTable.doLayout(JTable.java:2165)
     at java.awt.Container.validateTree(Container.java:1089)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validateTree(Container.java:1096)
     at java.awt.Container.validate(Container.java:1064)
     at java.awt.Window.show(Window.java:455)
     at java.awt.Component.show(Component.java:1134)
     at java.awt.Component.setVisible(Component.java:1089) <=====
     at mtu.gui.Test.test_03(Test.java:56)
     at mtu.gui.Test.main(Test.java:29)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.intellij.rt.execution.application.AppMain.main(Unknown Source)

When I create the table I have code like this:TableColumn col = getColumnModel().getColumn(2);
col.setMinWidth(width + 4);
col.setMaxWidth((int)(width * 1.2));Works just fine for me. The setWidthsFromPreferredWidths() method will use these limits as far as I can see.
PC²

How can i set the column width in the jtable?

how can i set the column width in the jtable?
can anybody send me a simple example??

TableColumn column = table.getColumnModel().getColumn( columnIndex );
column.setWidth( desiredColumnWidth);
column.setMinWidth( desiredMinColumnWidth);
column.setMaxWidth( desiredMaxColumnWidth);

Is there a jtable column width minimum?

Hi,
I try to set the column width in a JTable to 3 or 5, but it seems that there is a hard minimum width of 15.
I use
table.getColumnModel().getColumn(0).setMaxWidth(3);
Just afterwards I get with
System.out.println("width: "+table.getColumnModel().getColumn(0).getWidth());
width: 15
I tried to set autoresize false, validate, repaint, .... Nothing helps. I have no table header. It doesn't matter if I use a custom cell renderer or the default. If I set the width to e.g. 30, it works. But no way to get below 15.
Thanks, Ulrich

>
table.getColumnModel().getColumn(0).setMaxWidth(3);
Try this instead
table.getColumnModel().getColumn(0).setPreferredW
dth(3);ICE
The default minimum is 15, there is a setMinWidth function.
table.getColumnModel().getColumn(0).setMinWidth(3);then I would try setting the preferred width.

Proglem with JTable column width

Hi Friends,
I'm using jtable. For that table, i want to set the column width. But it is not working. Here is my code...
class ProcessTable extends JTable {
ProcessTable(){
getTableHeader().setResizingAllowed(true);
setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     TableColumn col = getColumnModel().getColumn(0);
     col.setPreferredWidth(100);
     col = getColumnModel().getColumn(1);
     col.setPreferredWidth(130);
}

Either don't change the TableModel or make sure you don't call fireTableStructureChanged() but fireTableDataChanged() (meaning loading the data doesn't change the columns, just the rows).
Or you can use JTable.setAutoCreateColumnsfromModel(false) and create the TableColumnModel yourself.

Fitting JTable column widths

Hi,
I have a JTable that it's columns are in AUTO_RESIZE_OFF mode. The table is in a JScrollPane that it's scrolls are shown when needed. The problem is that the table columns don't fill the scroll pane (horizontally) and because I'm using a layout I don't know that scroll size until the component appears. I need to set the column widths before the table appears.
Is there a solution for this problem?
Thanks,
Shai

To fill all the scrollpane you must use AUTO_RESIZE_ALL_COLUMNS or another mode different from AUTO_RESIZE_OFF. But in this case, rhe horizontal scrollbar won't appear.
I found a workaround to show the scrollbar when the viewport width is smaller than the preferred width of the JTable.
Denis

Is there any way to set default column widths in the Finder's Column view

When my Finder windows open in column view, all the columns are always VERY wide. I have to then spend time resizing them to a managable width. Is there any way to set default column widths in the Finder's Column view?
<Re-Titled By Host>

No, because you can't set a columns view default.
27" i7 iMac (Mid 2011) refurb, OS X Yo (10.10), Mavs, ML & SL, G4 450 MP w/10.5 & 9.2.2

OLE2 how to set a column width of an excel file i'm creating?

how can i set the column width in an excel file i'm creating with ole?
or even, haw can i set the auto-fix properties?

Hallo !
SORRY MY ENGLISH is very BAD.
I tried to set page header and footer in Excel sheet with abap ole
DATA : BEGIN OF enter,
         x(1) TYPE x VALUE '0D',
        END OF enter.
DATA : format(255) TYPE c.
FORM set_page_sheet.
CALL METHOD OF excel 'ActiveSheet' = sheet.
CALL METHOD OF sheet 'PageSetup' = pagesetup.
SET PROPERTY OF pagesetup 'Orientation' = xllandscape.
SET PROPERTY OF pagesetup 'PrintTitleRows' = '$9:$12'.
CLEAR format.
ERROR
CONCATENATE 'PAGESHEET' enter-x 'PAGE &P/&N' INTO format.
ERROR
SET PROPERTY OF pagesetup 'RightHeader' = format.
CLEAR format.
CONCATENATE ' Text 1 ' enter-x 'Text 2'
enter-x 'Text 3 ' INTO format.
SET PROPERTY OF pagesetup 'RightFooter' = format.
FREE OBJECT pagesetup.
ENDFORM.                    " set_page_sheet
Activate report -
ERROR - The enter-x must by data type c or another then data type x
Thanks for answer.

How to set displayed column width for a search help

I have created an elementary search help for a custom field with a value table behind it.
The search help functions correctly, but when displayed the column widths are all 10 characters. The user has to adjust the column to view the descriptive text.
Can anyone tell me how to set default column widths for the help?

Please open you Elementary search help and see the Column width behind the Fields of your ...there increase the width of the fields
"Activate it and refresh
reward points if it is usefull .....
Girish

What method should be used for resizing the particular JTable Column width

I have a four table. Only one table which are on top have a table header. I want that when user resize the topmost table with a mouse other table colume also be resized automatically. So I want to know that what method should be used for resizing the particular JTable Column width.
Thanks
Lalit

maybe you can implement a interface ComponentListener as well as ComponentAdapter with your topmost Table.
for example:
toptable.addComponentListener(
new ComponentAdapter(){
public void componentResized(ComponentEvent e){
table1.setSize(....);
table2.setSize(....);
/*Optionally, you must also call function revalidate
anywhere;*/
);

New to portal: Setting the column width in portal QBE report

I'm trying to set different widths to different columns in the QBE report. One of the columns in the report contains long descriptive text. With the default column width the reports runs into many pages and user has to scroll a lot. I would like to set the column width for this column so that it does not wrap for every 2/3 words. In the customization tab, I'm setting the width type to "Char" and selecting the number of characters to be displayed in that coulmn. Percent/pixel width type also didn't help. Should I set the Header width also?. I'm not sure where to set this header column width.QBE report just ignores these customization parameters and displays the report in default format. Please let me know if you have any idea/solution to this problem.
Thanks
Surya

Hi,
This is a bug and has been fixed 30984.
Thanks,
Sharmila

How to set JTable column's color?

How can I set JTable Columns' color? I only found this class DefaultTableCellRenderer
which can set cell's color.

rmalina wrote:
You are going to need to derive a renderer class for your Column from DefaultTableCellRenderer and override the following function with something like this:
@Override
public Component getTableCellRendererComponent(JTable jTable, Object oValue, boolean isSelected, boolean hasFocus, int nRow, int nColumn) {
super.setForeground(Color.GREEN);
super.setBackground(Color.GREEN);
}That would set your column to green.
Edited by: rmalina on Jul 28, 2008 8:47 AMHow can I know I only change the columns' color instead of other cells?

Set JTable column width

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