JTable sum of column widths table size prob

Hi there,
At the moment I've encountered a problem with JTable (it may be a feature?) that I can't seem to work around.
The problem is that I've got a JTable with a custom background color for the top row of cells. The problem is that the column widths are editable and if the user makes the last column narrower, than the background color of the top row bleeds into the background panel.
I'll try to make a small app displaying the problem, if anyone has ideas though or understands what I'm talking about I'd definitely appreciated any advice.
Thanks,
eknight

The problem is that I've got a JTable with a custom background color for the top row of cells. The problem is that the column widths are editable and if the >>user makes the last column narrower, than the background color of the top row bleeds into the background panel.It is difficult to say what you mean by the color bleeding. Because if you are using/overriding the tablecellrender to achieve the background coloring, it should be taken care off automatically.
Post a Short, compilable piece of code

Similar Messages

  • JTable resizing the column width

    Have a JTable whose column width's are set using
    int width = ((String)getDataTbl().getColumnModel().getColumn(0).getHeaderValue()).length() + 32;
    getDataTbl().getColumnModel().getColumn(0).setPreferredWidth(width);
    int width1 = ((String)getDataTbl().getColumnModel().getColumn(1).getHeaderValue()).length()+207
    getDataTbl().getColumnModel().getColumn(1).setPreferredWidth(width1);
    Now depending on the data in column 1 the column width has to be increased if more than width1 and the scroll bar should apprear only in this case only?
    How to do this?
    Thanks.

    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;*/
    );

  • JTable -  Horizontal Scrollbar - Column Width

    I wish to add a horizontal scrollbar(which for some stupid reason Java has not included) to my JTable which is inside a JScrollPane and also make sure that the width of the fourth column is longer and can fit the String that i wish to display. Now, i have searched the forum for solutions but none of them seem to work. The setting of the column width with the help of TableColumnModel does not seem to work and not to mention the fact that when i turn auto rezise off for the JTable, the JTable does give me a horizontal scrollbar but then it makes the columns so less in width that i have gray area left on the right hand side and the setColumnsToFit method does not work. I have five columns and here is the code, any help would be greatly appreciated Thanks:
    excepTable = new JTable(excepTableModel);
    excepTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    int width = 100;
    TableColumnModel tcm;
    TableColumn tc;
    for(int i = excepTable.getColumnCount(); i > 0; i--)
    tcm = (TableColumnModel)excepTable.getColumnModel();
    tc = tcm.getColumn(i);
    if(i == 3)
    width = 400;
    tc.setWidth(width);
    tc.setMinWidth(width);
    tc.setMaxWidth(width);
    tc.setPreferredWidth(width);
    width = 100;
    exScroller = new JScrollPane(excepTable);

    .I've set a horizontal scrollbar by using 'table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);You are welcome.
    i want the column widht to be adjusted according to the length of column names and record length.so please tell me how to do it?Search the forum. This question has been asked and answered before.

  • What is the best column width & font size for an ipad magazine

    I'm creating a magazine that will be shown on the ipad I was wondering what is the best column width and font size to use. If someone has any suggestions I'd love the help.
    thanks,

    You should know how you publish it and what the technical limitations of each type are.
    No one can or will give you any advise to use this or that font. Make several drafts, try it, pass on several drafts to testers and get response.
    If you work with styles, it is then easy for you to change it to the best result with a few clicks.
    Normally a column width with 37 to 45 letters I would personally suggest to be the best width, but opinions are very different on it. The more letters in a line the less readability is given, the less letters the more difficulty you will have to get an even grey factor. (I mean that through space between words some lines become bright others dark, which does not look so fine, I don't know the English technical term for that.)

  • How to size JTable Column width?? Need help

    Using the following logic to size column width, but only the 1st column is sized. How can I get the other columns sized??
    int widthsSummary[] = {340,60,150,60,60};
    for (int i=0; i<1; i++)
    column = getScrollPaneTableSummary).getColumnModel ().getColumn(i);
    column.setMinWidth(widthsSummary);
    column.setMaxWidth(widthsSummary[i]+50);
    column.setPreferredWidth(widthsSummary[i]);          

    First, take a look at your for loop
    for (int i=0; i<1; i++)i starts at 0 and cannot be equal to or greater than 1. This loop will only occur once, when i = 0.
    Second, take a look at your set...Width calls
    column.setMinWidth(widthsSummary);
    column.setMaxWidth(widthsSummary+50);
    column.setPreferredWidth(widthsSummary); widthsSummary is an array. You need a number to set widths. Try ...set...width(widthsSummary);
    Hope that helps.

  • Column width in JTables.Help needed!!!!

    Hi
    I am trying to print out a JTable and have had a few problems along the way but have managed to solve them all so far apart from this one. When the JTable is shown on screen it doesn't make the columns wide enough . I ahev managed to find some code from these forums but it doesnt resize correctly if the Column headings contain more text than any of the data (If you know what i mean). Below is the code i am using
    public void sizeAllColumnsToFitData (JTable table)  {
        for (int col = 0; col < table.getColumnCount (); col++)  {
          TableColumn curColumn = table.getColumn (table.getColumnName (col));
          if (curColumn == null)
            continue; // not a valid column skip
    //  Translate to the model
          int modelColumn = curColumn.getModelIndex ();
    //  Loop for all rows in this column looking for the widest piece of data
          int maxColumnWidth = 0;
          for (int row = 0; row < table.getRowCount(); row++)  {
            TableCellRenderer curCellRenderer = table.getCellRenderer (row, modelColumn);
            Object value = table.getValueAt (row, modelColumn);
            Component curRenderComponent = curCellRenderer.getTableCellRendererComponent(table, value, true, true, row, modelColumn);
            Dimension cellDimension = curRenderComponent.getPreferredSize ();
            if (cellDimension.width > maxColumnWidth)
              maxColumnWidth = cellDimension.width;
    //  Set the column width to fit the maximum
          Dimension cellSpacing = table.getIntercellSpacing ();
          curColumn.setPreferredWidth (maxColumnWidth + (cellSpacing != null ? cellSpacing.width : 1));
      }I pass my table into here and it works fine apart from in doesnt take into consideration the size of the headings. Please Help ME!!!!

    java.lang.NullPointerException
         at database_testing.SLAMS.sizeAllColumnsToFitData(SLAMS.java:473)
         at database_testing.SLAMS.getInfo(SLAMS.java:364)
         at database_testing.SLAMS.getInfo_actionPerformed(SLAMS.java:434)
         at database_testing.SLAMS_getInfo_actionAdapter.actionPerformed(SLAMS.java:527)
         at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
         at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
         at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
         at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
         at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
         at java.awt.Component.processMouseEvent(Component.java:5134)
         at java.awt.Component.processEvent(Component.java:4931)
         at java.awt.Container.processEvent(Container.java:1566)
         at java.awt.Component.dispatchEventImpl(Component.java:3639)
         at java.awt.Container.dispatchEventImpl(Container.java:1623)
         at java.awt.Component.dispatchEvent(Component.java:3480)
         at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
         at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
         at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
         at java.awt.Container.dispatchEventImpl(Container.java:1609)
         at java.awt.Window.dispatchEventImpl(Window.java:1590)
         at java.awt.Component.dispatchEvent(Component.java:3480)
         at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
         at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
         at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
         at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
         at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
         at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)Also i think it may have something to do with my headerRenderer being null cus if i replace the line TableCellRenderer headerRenderer = curColumn.getHeaderRenderer(); with TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer(); then it doesnt come up with an error but only increase the size of the coluns (where neccessary by 2 characters)

  • Display a horizontal scrollbar in a JTable as to fit column width

    hi all,
    I am using JTable to display records.I've set a horizontal scrollbar by using 'table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);',but although i got a horizontal scrol bar the column width is constant for all the columns and not getting adjusted according to the lenght of the column names. As the column names and the records are of different size in the database i want the column widht to be adjusted according to the length of column names and record length.so please tell me how to do it?
    regards...

    .I've set a horizontal scrollbar by using 'table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);You are welcome.
    i want the column widht to be adjusted according to the length of column names and record length.so please tell me how to do it?Search the forum. This question has been asked and answered before.

  • JTable column widths - help

    Hi,
    I have a JTable and I am having problems with the column widths. Currently, I place my JTable in a JScrollPane, and that's it. What I want is this:
    1. When the table is initially displayed, I want all the columns to be of equal width and use the entire width of the table (so no empty space at the end of the table)
    2. When I resize a column I want the other columns to maintain their size, and just have the scroll bars appear.
    3. When I resize the frame/browser that my app is running in, I want the scroll bars to appear.
    I tried the different autoResizeModes but I cant get the entire result which I need..any suggestions? Below is a code example...
    import java.awt.BorderLayout;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    public class Test1 extends JPanel {
         JScrollPane scroller;
         JTable table;
         String[][] rowData = new String[][] {
                   {"John", "18"},
                   {"Bill", "20"},
                   {"Alex", "17"}
         String[] columns = new String[] {
              "Name", "Age"     
         public Test1() {
              table = new JTable(rowData, columns);
              scroller = new JScrollPane(table);
              setLayout(new BorderLayout());
              add(scroller, BorderLayout.CENTER);
         public static void main(String[] args) {
              JFrame f = new JFrame();
              f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              Test1 t = new Test1();
              f.getContentPane().add(t);
              f.setSize(600, 600);
              f.setVisible(true);
    }

    Forget about my last post. The following code works but I guess you'll have to work on it to make it more elegant.import java.awt.BorderLayout;
    import javax.swing.*;
    public class Test1 extends JPanel {
         String[][] rowData = new String[][]{{"John", "18"}, {"Bill", "20"}, {"Alex", "17"}};
         String[] columns = new String[]{"Name", "Age"};
         JTable table;
         JScrollPane scrollPane;
         public Test1() {
              super(new BorderLayout());
              table = new JTable(rowData, columns);
              table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
              scrollPane = new JScrollPane(table);
              add(scrollPane, BorderLayout.CENTER);
         public void pack() {
              System.out.println("pack");
              int columnCount = table.getColumnCount();
              if (columnCount == 0) {
                   System.out.println("columnCount = 0");
                   return;
              int width = scrollPane.getViewport().getSize().width;
              System.out.println("width = " + width);
              if (width == 0) return;
              int columnWidth = width / columnCount;
              System.out.println("columnWidth = " + columnWidth);
              for (int i = 0; i < columnCount; i++) {
                   table.getColumnModel().getColumn(i).setPreferredWidth(columnWidth);
              table.revalidate();
              table.repaint();
         public static void main(String[] args) {
              JFrame f = new JFrame();
              f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              final Test1 t = new Test1();
              f.setContentPane(t);
              f.setSize(600, 600);
              f.setVisible(true);
              SwingUtilities.invokeLater(new Runnable() {
                   public void run() {
                        t.pack();
    }

  • 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\\&#1056;&#1072;&#1073;&#1086;&#1095;&#1080;&#1081; &#1089;&#1090;&#1086;&#1083;"), 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 );

  • 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

  • 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.
    PC&#178;

  • Tweaking JTable column widths

    One of the things I don't seem to be able to do cleanly is programatically sizing column widths. What I'm trying to do, presently, is to try and set column widths on numeric columns according to class.
    This is what I'm trying:
       public static void tweakColumns(JTable table) {
            TableColumnModel tcm = table.getColumnModel();
            TableModel data = table.getModel();
            table.createDefaultColumnsFromModel();
            for(int i = 0; i < tcm.getColumnCount(); i++) {
                TableColumn col = tcm.getColumn(i);
                Class cls = data.getColumnClass(i);
                if(cls.equals(Percentage.class))
                    col.setPreferredWidth(44);
                else if(cls.equals(Money.class))
                    col.setPreferredWidth(60);
                else if(cls.equals(Integer.class))
                    col.setPreferredWidth(20);
            table.revalidate();
        }I've tried calling this when I set the table up, I've tried defering it with invokeLater. The problem appears to be when there's plenty of space the additional space is applied indiscrimitely, smothering my settings, whereas I want the extra to be applied to the columns I don't set preferences for (typically text fields).
    I don't want to impose a maximum column width if the user choses to resize columns. I want to control the distribution of space when it's done by swing.

    I think your only solution is to set the Preferred sizes of all the columns, even the textfields.
    I have done similar thing and it works but only when all the preferred sizes of all the columns are set.
    If you record the total width available to all columns before you start setting the preferred sizes of the Percentage, Money and Integer columns you can subtract the sizes of these columns as you set them. When you come out of the loop you will have a value that is what is left of the width. You can then set all the remaining unset columns to values based on this remaining width.
    i.e. you have 700 pixels total width the the initial loop you have fields that result in 340 pixels being allocated. You have 360 pixels left over. If you have 3 remaining unset fields then you then set their preferred sizes to be 120 pixels. This, I think, will force swing to allocate in the way you want.
    I've never tried it but you might find setting the textfields to unrealistically large Preferred sizes will make swing attempt to do its best and end up with what you want.

  • How to fix Classic table column width / length fix ?

    Hi,
    I have a page for display purpose. In this page I am showing record.
    My requirement is to make Description column width fix. If data of description is huge then height will increase but not the length / width.
    Currently width property is 100%.
    Table is attached to VO.
    How to it ?
    Regards,
    Ajay

    Ajay ,
    I was looking into the two screen shots , i also had a close look at “Device Description” and “UDID " columns .
    I have also tried in my Jdeveloper it was not working . But it works fine if you change item style from styled text to
    message text input . I want you to try one more thing , since it work fine for message text input , change item style
    to message text input and set Read Only property to ' TRUE' and check .
    Keep size as same as you did before :
    Height :- 2
    Width :- 30
    Keerthi

  • How to set initial column widths for a table

    What I'd like to do is to control the initial column widths for a table.
    I'm building the table by using a class which extends AbstractTableModel. This class takes care of setting the headers and reading the data for the table.
    If I do the following:
    VarTableModel vtm = new VarTableModel(vi);
    JTable jt = new JTable(vtm);
    JScrollPane jsp = new JScrollPane(jt);
    frame.getContentPane().add(jsp);
    frame.setVisible(true);
    I will see a table in my window. The widths of the columns are equal and are a function of the horizontal dimension of the window.
    I have tried to set the width of a column by doing the following:
    TableColumn aColumn;
    aColumn = jt.getColumn(vtm.getColumnName(0));
    aColumn.setWidth(40);
    But this has no effect on what gets displayed. I can force the widths that I want by using 'setMaxWidth' but this has the unfortunate side effect of not allowing the user to make the column wider if they want.
    What I'd like is a way to specify the widths of the columns when initially displayed and then let the user adjust to their liking.
    I'm sure that there is a way to do this, but I don't seem to understand where to intervene in the process to produce the effect that I want.
    Any help or suggestions will be greatly appreciated!

    Table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    add this line and try ur codeThanks for the suggestion! Unfortunately, it doesn't seem to do the trick. Here is an abbreviated segment of my code:
    vtm = new VarTableModel(vi);
    JTable jt = new JTable(vtm);
    // we want a horizontal scrollbar, so turn resizing off
    // and we want to control column widths
    jt.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    aColumn = jt.getColumn(vtm.getColumnName(0));
    aColumn.setWidth(40);
    . // same kind of thing for each column
    aColumn = jt.getColumn(vtm.getColumnName(4));
    aColumn.setWidth(400);
    JScrollPane jsp = new JScrollPane(jt);
    frame.getContentPane().add(jsp);
    frame.setVisible(true);
    If I do the above, the table gets displayed with each of the five columns the exact same width. So, the sizing of the columns is happening somewhere else despite turning auto resizing off.
    Where is that occurring and how can I intervene so that I can control the widths of the columns on initial display and still allow the user to adjust the widths if they so choose?

  • How to control column width in table?

    I have a table with four columns, and they are all with same width.
    But I want to make one of them wider.
    How should I do?
    public void loadTable(){
    Vector infoList = myObj.getInfoList();
    Info info;
    DefaultTableModel dtm = (DefaultTableModel)myPanel.tblList.getModel();
    String[] columnNames = {
    "wider column",
    "Column B",
    "Column C",
    "Column D"};
    dtm.setColumnIdentifiers(columnNames);
    for(int i=0;i< infoList.size();i++){
    // add stuff to "data"
    dtm.addRow(data);
    myPanel.tblList.setModel(dtm);
    myPanel.tblList.getColumnModel().getColumn(1).setWidth(100);
    I also tried setPreferedWidth(), not working for me either.
    What should I do?
    Thank you

    Try setting all the column widths. Define values for normal and width columns:
            DefaultTableColumnModel tcModel = (DefaultTableColumnModel) myTable.getColumnModel();
            Enumeration columnEnum = tcModel.getColumns();
            while (columnEnum.hasMoreElements()) {
                TableColumn column = (TableColumn) columnEnum.nextElement();
                if (column.getModelIndex()  != 1) {
                    column.setPreferredWidth(narrowWidth);
                } else {
                    column.setPreferredWidth(wideWidth);
    Cheers
    DB

Maybe you are looking for