JTable size

Does anyone know if the default table model has a default max number of rows and if so what it is or how the overide it.
When I try to display over 110 rows in a scrollpane it doesn't display anything.

I am routinely able to display thousands of rows. I don't believe there is any default max size.
-Ray Clough

Similar Messages

JTable size problems due to layout/grid...how can I fix?

This is my code. When the button "Modify Entries" is pressed, it shows a JTable that imports a file called, "entries.data". The items in this file can be read and saved using this program. The problem is that the table is so small when it first opens. How can I set all my buttons to the very bottom of the form and make the table take up more space at the top? It looks to me as if this layout is treating it with the same dimensions as the buttons'.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.util.*;
import java.io.*;
public class CPT extends JPanel implements ActionListener
    protected JButton ModifyEntriesButton, ViewEntriesButton, SearchEntriesButton, SaveButton, BackButton;
    private final static String newline = "\n";
    private DefaultTableModel model;
    public CPT ()
        super (new GridLayout (10, 0));
        model = new PropertiesModel ("entries.data");
        ModifyEntriesButton = new JButton ("Modify Entries");
        ModifyEntriesButton.setVerticalTextPosition (AbstractButton.TOP);
        ModifyEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
        ModifyEntriesButton.setToolTipText ("Click this button to modify database entries.");
        ModifyEntriesButton.setMnemonic (KeyEvent.VK_M);
        ModifyEntriesButton.setActionCommand ("ModifyEntries");
        ModifyEntriesButton.addActionListener (this);
        ViewEntriesButton = new JButton ("View Entries");
        ViewEntriesButton.setVerticalTextPosition (AbstractButton.CENTER);
        ViewEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
        ViewEntriesButton.setToolTipText ("Click this button to add view all database entries.");
        ViewEntriesButton.setMnemonic (KeyEvent.VK_V);
        ViewEntriesButton.setActionCommand ("ViewEntries");
        ViewEntriesButton.addActionListener (this);
        SearchEntriesButton = new JButton ("Search Entries");
        SearchEntriesButton.setVerticalTextPosition (AbstractButton.BOTTOM);
        SearchEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
        SearchEntriesButton.setToolTipText ("Click this button to search through all database entries.");
        SearchEntriesButton.setMnemonic (KeyEvent.VK_S);
        SearchEntriesButton.setActionCommand ("SearchEntries");
        SearchEntriesButton.addActionListener (this);
        SaveButton = new JButton ("Save");
        SaveButton.setVerticalTextPosition (AbstractButton.TOP);
        SaveButton.setHorizontalTextPosition (AbstractButton.RIGHT);
        SaveButton.setToolTipText ("Click this button to save database entries.");
        SaveButton.setMnemonic (KeyEvent.VK_S);
        SaveButton.setActionCommand ("Save");
        SaveButton.addActionListener (this);
        BackButton = new JButton ("Back");
        BackButton.setVerticalTextPosition (AbstractButton.BOTTOM);
        BackButton.setHorizontalTextPosition (AbstractButton.RIGHT);
        BackButton.setToolTipText ("Click this button to return to the main menu.");
        BackButton.setMnemonic (KeyEvent.VK_B);
        BackButton.setActionCommand ("Back");
        BackButton.addActionListener (this);
        add (ModifyEntriesButton);
        add (ViewEntriesButton);
        add (SearchEntriesButton);
    class PropertiesModel extends DefaultTableModel
        public PropertiesModel (String filename)
            addColumn ("Item Number");
            addColumn ("Description");
            addColumn ("Price");
            //Fill model with data from property file
            Properties props = readFile (filename);
            if (props != null)
                Enumeration coll = props.keys ();
                while (coll.hasMoreElements ())
                    String property = (String) coll.nextElement ();
                    String value = props.getProperty (property, "");
                    addRow (new Object[]
                        property, value
    private Properties readFile (String filename)
        try
            Properties props = new Properties ();
            props.load (new FileInputStream (filename));
            return props;
        catch (IOException ioe)
            return null;
    private boolean saveFile (String filename)
        try
            Properties props = new Properties ();
            for (int i = 0 ; i < model.getRowCount () ; i++)
                props.put (model.getValueAt (i, 0), model.getValueAt (i, 1));
            props.store (new FileOutputStream (filename), null);
            return true;
        catch (IOException ioe)
            return false;
    public void actionPerformed (ActionEvent e)
        if ("ModifyEntries".equals (e.getActionCommand ()))
            removeAll ();
            add (new JScrollPane (new JTable (model)), BorderLayout.CENTER);
            add (SaveButton);
            add (BackButton);
            invalidate ();
            updateUI ();
        if ("ViewEntries".equals (e.getActionCommand ()))
            removeAll ();
            add (BackButton);
            invalidate ();
            updateUI ();
        if ("SearchEntries".equals (e.getActionCommand ()))
            removeAll ();
            add (BackButton);
            invalidate ();
            updateUI ();
        if ("Back".equals (e.getActionCommand ()))
            removeAll ();
            add (ModifyEntriesButton);
            add (ViewEntriesButton);
            add (SearchEntriesButton);
            invalidate ();
            updateUI ();
        if ("Save".equals (e.getActionCommand ()))
            if (saveFile ("entries.data"))
                JOptionPane.showMessageDialog (null, "File saved successfully.");
            else
                JOptionPane.showMessageDialog (null, "File could not be saved!");
    // Create the GUI and show it. For thread safety,
    // this method should be invoked from the
    // event-dispatching thread.
    private static void createAndShowGUI ()
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated (true);
        //Create and set up the window.
        JFrame frame = new JFrame ("Swisha Computer House");
        frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
        //Create and set up the content pane.
        JComponent newContentPane = new CPT ();
        newContentPane.setOpaque (true); //content panes must be opaque
        frame.setContentPane (newContentPane);
        //Display the window.
        frame.pack ();
        frame.setSize (300, 300);
        frame.setVisible (true);
    public static void main (String[] args)
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater (new Runnable ()
            public void run ()
                createAndShowGUI ();
}Hey, and if anyone knows how to get the first column's numbers from the file to show up in descending order (1 through to, say, 500), please let me know.
Thank you for any help.

It looks to me as if this layout is treating it with the same dimensions as the buttons'.Thats the way a GridLayout works.
Read the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/layout/visual.html]How to Use Layout Managers. You can mix an match individual Layout Managers to get the effect desired.
I would suggest you need to change your design. Your code for continually removing and adding components is not the best design. You should probably have a panel with all your buttons. Then you would have different panels for each of your sub functions. The display of these panels would be controlled by a Card Layout. The tutorial has working examples of this.
You can't use a Properties file to save data from the table (at least not the way you are attempting to use it). I gave you a solution in your last posting.

JTable in JCombo

i want to display JTable in JComboBox
please see this code and tell me the mistake
import java.awt.*;
import java.lang.Object.*;
import javax.swing.*;
import javax.swing.text.*;
import java.awt.event.*;
import javax.swing.plaf.basic.*;
import javax.swing.plaf.metal.*;
import java.util.*;
import javax.swing.table.*;
//My Custom ComboBox
class myCombo extends JComboBox{
protected int popupWidth;
public myCombo(Vector vItems)
//super(vItems);
this.addItem(vItems);
setUI(new myComboDefaultUI());
//setBorder(new EtchedBorder());
public Dimension getPopupSize() {
Dimension size = getSize();
if (popupWidth < 1) popupWidth = size.width;
return new Dimension(popupWidth,
size.height);
//UI class controls popup size and location
public class myComboDefaultUI extends BasicComboBoxUI{
protected ComboPopup createPopup(){
BasicComboPopup popup = new BasicComboPopup(comboBox){
protected JScrollPane createScroller() {
JScrollPane jscrollpane = new JScrollPane( list,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED );
return jscrollpane;
}//end of method createScroller
public void show() {
Dimension popupSize = ((myCombo)comboBox).getPopupSize();
popupSize.setSize( popupSize.width,
getPopupHeightForRowCount(
comboBox.getMaximumRowCount() ) );
//computes popup size
Rectangle popupBounds = computePopupBounds( 0,
comboBox.getBounds().height, popupSize.width, popupSize.height);
list.invalidate();
int selectedIndex = comboBox.getSelectedIndex();
if ( selectedIndex == -1 ) {
list.clearSelection();
} else {
list.setSelectedIndex( selectedIndex );
list.ensureIndexIsVisible( list.getSelectedIndex() );
setLightWeightPopupEnabled(
comboBox.isLightWeightPopupEnabled() );
show( comboBox, popupBounds.x,
popupBounds.y);
return popup;
}//end of method createPopup
}//end of inner class myComboUI
//My custom Renderer
class Renderer extends javax.swing.JTable implements
ListCellRenderer {
int nTotalRows;
static int nRunningRows=0;
String columnNames[];
/** Creates new Renderer */
public Renderer() {
super();
public Renderer(int nRows, int nCols, int nListRows)
//super(nRows,nCols);
nTotalRows = nListRows;
public Component getListCellRendererComponent(JList
p1,Object rowData,int index,boolean isSelected,boolean
cellHasFocus) {
//FDFH fdfh;
//if (value instanceof FDFH)
Vector value = (Vector) rowData;
this.setModel(new DefaultTableModel(value.size(),((Vector)value.elementAt(0)).size())) ;
System.out.println("Value is:" + value.toString()+ ", index:" + index);
//fdfh = (FDFH)value;
//Put values into JTable cells
System.out.println(value+"shekar");
if(index != -1)
{     for(int i=0;i<value.size();i++)
     Vector v1=(Vector)value.elementAt(i);
     for ( int j = 0; j < v1.size(); j++ ) {
     getModel().setValueAt( v1.elementAt(j), i, j ) ;
/*     if(index<2)
     getModel().setValueAt(value,0,index);
     else{
     getModel().setValueAt(value,1,index-2);
//getModel().setValueAt(value,0,1);
//getModel().setValueAt(value,0,2);
//Set JTable Size
//setSize(700,300);
setRowSelectionAllowed(true);
return this;
public class Combo2 extends JFrame{
     JPanel p=new JPanel();
     public myCombo com;
     protected int popupWidth;
     public Combo2(){
          String columnNames[][] ={{"Name", "Vorname", "Ort", "PLZ"},
          {"Mark", "Andrews", "Baseball", "1"},
          {"Tom", "Ball", "Football", "2"},
          {"Alan", "Chung", "Baseball", "3"},
          {"Jeff", "Dinkins", "Football", "4"},
          {"Amy", "Fowler", "Hockey", "5"}};
     Vector v=new Vector();
     for(int i=0;i<columnNames.length;i++)
          Vector v1=new Vector();
     for(int j=0;j<columnNames.length;j++)
     v1.addElement(columnNames[i][j]);
          v.addElement(v1);
     com=new myCombo(v);
     Renderer renderer =new Renderer(6,4,1);
     com.setRenderer(renderer);
     p.add(com);
     //com.setUI(new myComboDefaultUI());
     this.getContentPane().add(p);
     this.setSize(500,200);
     this.setVisible(true);
     public static void main (String [] arg){
          Combo2 obj=new Combo2();
Hope this helps.
Regards,
chandru

Hi,
What is not working???
JRG

Unable to grow and shrink a JTable within a JScrollPane

I need help with the following: I want to display a JTable component with a calendar like design. Dragging the size of the parent component (having a border to drag) should dynamically adapt the JTable' size and its cells. Since the JTable has a minimum size shrinking the parent component should show scrollbars if the minimum size is reached horizontal or vertical respectively.
I have the JTable put ijnto the viewport of a scrollpane and the scrollpane is the child component of a JPanel. So dragging appears with the panel.
The JTable cells do nicely but from a specific size on there is a grey area on the lower part of the JPanel which is not repainted. What is causing this? What do I have to do? I'm lost in the jungle of invalidate(), repaint(), update(), doLayout() etc.
Here is my SSCCE (at least I hope it is one):
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
//public class MyComponent extends JScrollPane
public class MyComponent extends JPanel
///   class data
     static public final long serialVersionUID = -1L;
     static public final int c_ColWidth = 29;
     static public final int c_RowHeight = 18;
     static public final int c_TableWidth = 930;
     static public final int c_TableHeight = 234;
///   instance data
     private String[] m_strColHeader = {
          "01", "02", "03", "04", "05", "06", "07", "08", "09", "10",
          "11", "12", "13", "14", "15", "16", "17", "18", "19", "20",
          "21", "22", "23", "24", "25", "26", "27", "28", "29", "30",
          "31",
     private Object[][] m_Data = new Object[12][33];// data array
     private TableModel m_DataModel = new AbstractTableModel() {
          static public final long serialVersionUID = -1L;
          public int getColumnCount() { return m_strColHeader.length; }
          public int getRowCount() { return m_Data != null ? m_Data.length : 0; }
          public Object getValueAt(int row, int col) { return m_Data[row][col]; }
          public String getColumnName(int col) { return m_strColHeader[col]; }
          public Class getColumnClass(int col) { return String.class; }
          public boolean isCellEditable(int row, int col) { return false; }
          public void setValueAt(Object aValue, int row, int col) {
               m_Data[row][col] = aValue;
     protected BorderLayout myLayout = new BorderLayout();
     protected JTable tableView = new JTable(m_DataModel);
     protected JScrollPane scrollPane = new JScrollPane(tableView);
///   public class methods
     static public void main(String[] args)
          try
               UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
          catch(Exception e)
               e.printStackTrace();
          MyComponent comp1 = new MyComponent();
          JFrame frame = new JFrame("MyComponent");
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          frame.getContentPane().add(comp1);
          frame.pack();
          frame.setVisible(true);
///   constructors
     public MyComponent()
          try
               jbInit();
               initTable();
          catch(Exception ex)
               ex.printStackTrace();
///   protected instance methods
     protected void initTable()
          // do nor allow user interaction with calendar view
          tableView.getTableHeader().setReorderingAllowed(false);
          tableView.getTableHeader().setResizingAllowed(false);
          //tableView.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          tableView.setRowHeight(c_RowHeight);
          // adapt all CellRenderers
          for (int i = 0; i < m_DataModel.getColumnCount(); i++)
               TableColumn column = tableView.getColumn(tableView.getColumnName(i));
               column.setMinWidth(c_ColWidth);
               column.setPreferredWidth(c_ColWidth);
///   private instance methods
     private void jbInit() throws Exception
          this.setLayout(myLayout);
          this.add(scrollPane, BorderLayout.CENTER);
          scrollPane.getViewport().setMinimumSize(new Dimension(c_TableWidth, c_TableHeight));
          scrollPane.getViewport().setPreferredSize(new Dimension(c_TableWidth, c_TableHeight));
          tableView.setPreferredSize(new Dimension(c_TableWidth, c_TableHeight));
          addComponentListener(new MyComponent_componentAdapter(this));
///   event handling
     public void componentBoundsChanged(ComponentEvent e)
          scrollPane.setBounds(0, 0, getWidth(), getHeight());
          scrollPane.getViewport().setBounds(0, 0, getWidth(), getHeight());
          //tableView.setBounds(0, 0, getWidth(), getHeight());
          tableView.setSize(scrollPane.getViewport().getWidth(), scrollPane.getViewport().getHeight());
          tableView.setRowHeight(getBounds().height / 13 < c_RowHeight ?
                    c_RowHeight : getBounds().height / 13);
          System.out.println("componentBoundsChanged: getBounds() = " + getBounds());
          System.out.println("componentBoundsChanged: getSize() = " + getSize());
          System.out.println("componentBoundsChanged: getViewport().getBounds() = " + scrollPane.getViewport().getBounds());
          System.out.println("componentBoundsChanged: getViewport().getSize() = " + scrollPane.getViewport().getSize());
          System.out.println("componentBoundsChanged: tableView.getBounds() = " + tableView.getBounds());
          System.out.println("componentBoundsChanged: tableView.getSize() = " + tableView.getSize());
///   event adapters
class MyComponent_componentAdapter extends ComponentAdapter
     protected MyComponent adaptee;
     MyComponent_componentAdapter(MyComponent adaptee)
          this.adaptee = adaptee;
     public void componentMoved(ComponentEvent e)
          adaptee.componentBoundsChanged(e);
     public void componentResized(ComponentEvent e)
          adaptee.componentBoundsChanged(e);
}

I guess i am facing exactly opposite problem.
What i want to do is, I have nested tables in a scroll pane. So I don't want a scroll pane to show exactly whatever visible rows are there in Table (No extra space). If i expand any row, i want scroll pane to be able to show expanded.

Post data on JTable

Does anyone know how I can post some Strings on a JTable? I created the JTable like shown below:
String headers[] = {"FileName","FileSize","User","IP","Status"};
String size [][] = new String[35][5];
JTable table = new JTable(size,headers);
JScrollPane scroll = new JScrollPane(table);How can I post some String on it?

Probably you can try out in this way...just change the neccesary code to populate data on the jtable...i use DefaultTableModel...
String[] colnames={"col A","col B","col C"};
DefaultTableModel dtm=new DefaultTableModel();
Integer[][] data=new Integer[10][4];
for(int r=0;r<10;r++){
for(int c=0;c<4;c++){
data[r][c]=new Integer(10);
dtm.setDataVector(data,colnames);
JTable table=new JTable();
table.setModel(dtm);
i hope it will work...
thanx...

Changing the size of a jbutton inside a jtable

Hi,
I have found this example for adding a jbutton to a jtable:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=715330
however, I have cannot seem to figure out how to set the size of the jbutton. Currently, the jbutton is filled to the size of the cell within the jtable, but i want to have it a bit smaller and centered (the rows of my table are rather large in hieght)
I tried the setSize()
setPrefferedSize()
setMinimumSize()
setMaximumSize()methods, but nothing seems to work. Has anyone been able to do this?

Use a JPanel instead of a JButton as cell renderer. Put a button inside the panel - use FlowLayout.

Changing the size of column in JTable as per requirement

I'm copying content of excel file into the JTable.
But as the number of columns increases the size of columns get reduced.
But i want the table of same column size for any number of columns in the table.
If display area size is less then JTable must scroll according to the size.

Scroll bars appear when the table's size is larger than the scrollpane's viewport. So your viewport is a fixed size. You adjust the size of the table to get the scrollbars to appear and get smaller (as the table's size increases).

How to initilize the size of rows in an jtable in run time

i am trying to retrieve data from a oracle database and display them in an jtable ,but i could not figure out how to increase the size of the table based on the number of records fetched in runtime. i also want to add checkbox for each enrty made in the jtable such that by cheching the box ,i could select the data and process it in futher frames. i use an netbean5 version for design.kindly give me giudence.

Best thing to do is write your own table model and a Cell Renderer for the check box.
Please follow the "How to use tables" tutorial.
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html

Set Maximum size for combobox editor in JTable

Hi guys.
I have a JTable with a custom JTextArea as editor for string datatypes.
On the other hand, I have a combo editor too for some other columns of the table.
My question is to know whether I can force the combox editor not to grow along with the text area.
When I have a multiline text in a cell, I don 't want the combo box editor to fill the entire height of the row (the row height is continuously adjusted as user enter text into the text area cell editor), but to remain as big as just to render one line.
Thanks.

you know there's a swing forum, why not use it :-)
As to your problem: the basicUI simply forces all editors to fit the cell size, returning more reasonable max-sizes for the combo wouldn't help. Way out might be to wrap into a panel with an appropriate layoutManager. Not entirely trivial, would expect some work ...
Cheers
Jeanette

ComboBox size in JTable

How do you set the size of a combobox inside a JTable cell. I have used setPreferredWidth but the ccombo box is still huge. I have done searches and not found any answers.
Thanks

I've always let the UI take care of it. I don't set the minimum, maximum or preferred sizes and the UI sets the size to the size fo the cell.

Size of combobox in JTable with custom cell editor

Hi All -
I have a JTable that displays a combobox in certain cells. I have a custom table model, renderer, and editor. All of that works fine. I render the combobox with the renderer, and then return the combobox as an editor in the editor so that it can drop down and actually be of use. My problem is - I set the size of the combobox with a setBounds call in the renderer, I add it to a panel, and return the panel - because I dont want the combobox to take up the entire space of the cell. This approach fails in the editor. The setBounds and setSize calls have no effect. As soon as you click the combobox, the editor takes over and all of a sudden the combobox resizes to the entire area of the cell. I assume this is because in the editor you arent actually placing anything - your simply returning the "editing form" of the component.
So - anybody know of a way to work around this? Worst case, I could just allow the combobox to use the entire area of the cell - but it makes it uglier so I figured I would run it by the forums.
Eric

Rather than just redirect you to my previous answer from ages ago, I'll just give it again. :-)
You can actually do this, but you have to get tricky. By default, the dropdown's width will be the same width as the cell... but it doesn't have to be that way. Essentially what you have to do is override the UI (MetalComboBoxUI) for the combo component. In your new customized UI component subclass (that you set the combo to use), modify the the createPopup() method of this UI class, and add your own logic to set the size of the popup before you return it.
Ideally the size would be based on the computed max width of a rendered item shown in the combo, but really you could set it to whatever just to see how it works.

Control the size for a JButton in a cell of JTable

Hi,
I am trying to add a column buttons on cells of a JTable. I followed the example from http://www.esus.com/docs/GetQuestionPage.jsp?uid=1285 and made it work (thanks).
But, the buttons always resize to fit the column. Is there a way I can set button size, so the button will be smaller?
Any information would be appreciated. Thanks in advance.

Use a panel as a renderer and add the button to the panel, and manually set the preferred size of the button yourself. Then when the panel is added to the cell it will be resized, but the button will remain at its preferred size.

JTable in JScrollPane, preferred size

When I put a JTable in a JScrollPane, the JScrollPane seems to want to be very big. How does the scroll pane determine its size? run this code for an example..
import javax.swing.*;
public class TestPanel extends JPanel
public TestPanel()
     add(new JScrollPane(new JTable(1,1)));
public static void main(String args[])
     JFrame f = new JFrame("big table test");
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     TestPanel thePanel = new TestPanel();
     f.setContentPane(thePanel);
     f.pack();
     f.show();

public class TestPanel extends JPanel {
public TestPanel() {
    JTable jt = new JTable(1,1);
    jt.setPreferredScrollableViewportSize(new Dimension(100,100)); // Do this
    JScrollPane jsp = new JScrollPane(jt);
    jsp.setPreferredSize(new Dimension(100,100)); //OR this
    add(new JScrollPane(new JTable(1,1)));
}

JScroller on JTable and table size

Hi everyone...
I have a small problem...i added JScrollPane to my JTable...but if i do the following...
JScrollPane contentScroller= new JScrollPane(myJTable,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
myJTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);In this case scroller works great....accept if i have a smaller data set to show...for example only one column...
Basically what i would like is to be able to set like minimum size of my JTable...is that possible...

Oh ya...
sorry i apologize...
Well basically what i did is the following...
In the constructor of my sub-class that extends JTable i set the following property:
this.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
/*...........................................................................*/ And then i also added the following code...(i created some additional methods...i dont really know if this is the right way but i didnt find anything more suitable for my problem)
/*i set JScrollPane onto witch i added my JTable class instance, to a private JscrollPane variable*/
public void setParentJPanel(JScrollPane parentJScrollPane){
        this.parentJScrollPane = parentJScrollPane;
/*I only added these 3 methods cos i wanted to get the size of JScrollPane onto witch i added my JTable class instance*/
    public JScrollPane getParentJPanel(){
        return this.parentJScrollPane;
/*this methods sort of sets all the columns to equal size witch i guess i wanted it to do...*/
    public void setAllColumnsWidth(){
        int parentWidth = this.getParentJPanel().getWidth();
        int columnNumber = this.getColumnNumber();/*method that i wrote to work with another class that works with database*/
        int columnWidth = parentWidth/columnNumber;
        for(int i=0;i < columnNumber;i++)
            this.getColumnModel().getColumn(i).setPreferredWidth(columnWidth);
    }Hmmm sorry again for not posting my solution...its not really that much impressive thats why i didnt post it the first time...
Well i hope it helps....(what i needed is basically how to set columns to as equal size as possible...)

Setting the Size of a Column in a JTable

Hi there,
does anybody knows a way how to set the size of a specified column in a JTable without changinge the size of the other columns?
thx anyway
Errraddicator

You've got to change the JTable's column resizing policy to prevent the other columns resizing:
JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF)Otherwise all the columns will be adjusted to fit into the width of the table - changing one column would have to result in at least one other column changing!
Hope this helps.

JTable size

Similar Messages

Maybe you are looking for