JTable inside JScrollPane

When i'm in the last column and press enter i want to get the focus to the cell in next row in first column. It is getting focused when i press enter but, how can i automatically scroll the horizontal scroll bar to get that that cell visible.

Change selection - it should automaticaly scroll
yourTable.setRowSelectionInterval(rowSelected, rowselected)

Similar Messages

Drag/drop into JTable inside JScrollPane

Hello,
I have a table inside a JScrollPane. I can set the table as the DropTarget by the command:
new DropTarget(table,fileDropTargetListener);
but I cannot set the JScrollPane be the DropTarget by the same command.
the problem is that: I cannot set the table to fit the JScrollPane by the command setsize(scrollPane.getSize() ), setPreferedSize(scrollPane.getPreferedSize()), (don't know for what reason, they don't work to fit the scrollpane), therefore when user drags an item to the JScrollPane but outside the table, the drag gesture doesnot display.
Please anyone help me how to solve this problem. Thank you,
fantabk

Yes, I use custom cell renderer and cell editor for ParentTable, which returns NestedTable.
DnD turned on for the ParentTable, so when the NestedTable is active (some cells selected in it) it receives DnD events, which are turned off for it, and DnD doesn't work.
Possible solution is to turn DnD for NestedTable (not for ParentTable), and i'll do this if it is impossible to make it work in current configuration.
So the question is � is this possible do not pass DnD event to NestedTable ?

Jtable inside a JscrollPane - Can't see the left hand side of my Jtable (th

Jtable inside a JscrollPane - Can't see the left hand side of my Jtable (the border)from some reason - please help. This is my code:
public class RecordSetPanel extends JPanel {
private JTable rsTable;
private JScrollPane tableScrollPane;
public RecordSetPanel() {
setLayout(new BorderLayout());
rsTable = new JTable();
rsTable.setBackground(getBackground());
rsTable.setRowHeight(25);
rsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tableScrollPane = new JScrollPane(rsTable) {
public Insets getInsets() {
return new Insets(20, 20, 20, 20);
tableScrollPane.setBorder(BorderFactory.createLineBorder(getBackground()));
add(tableScrollPane, BorderLayout.CENTER);

I've tested this code and it looks fine:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Dialog1
    extends JDialog {
JPanel panel1 = new JPanel();
BorderLayout borderLayout1 = new BorderLayout();
public Dialog1(Frame frame, String title, boolean modal) {
    super(frame, title, modal);
    try {
      jbInit();
      pack();
    catch (Exception ex) {
      ex.printStackTrace();
public Dialog1() {
    this(null, "", false);
public static void main(String args[]) {
    new Dialog1().show();
private void jbInit() throws Exception {
    panel1.setLayout(borderLayout1);
    panel1.add(new RecordSetPanel(), BorderLayout.CENTER);
    getContentPane().add(panel1);
public class RecordSetPanel
      extends JPanel {
    private JTable rsTable;
    private JScrollPane tableScrollPane;
    public RecordSetPanel() {
      setLayout(new BorderLayout());
      TableModel dataModel = new AbstractTableModel() {
        public int getColumnCount() {
          return 10;
        public int getRowCount() {
          return 10;
        public Object getValueAt(int row, int col) {
          return new Integer(row * col);
      rsTable = new JTable(dataModel);
//      rsTable.setBackground(getBackground());
      rsTable.setRowHeight(25);
      rsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
//      tableScrollPane = new JScrollPane(rsTable) {
//        public Insets getInsets() {
//          return new Insets(20, 20, 20, 20);
//      tableScrollPane.setBorder(BorderFactory.createLineBorder(getBackground()));
      add(new JScrollPane(rsTable), BorderLayout.CENTER);
}

Problem in refreshing JTree inside Jscrollpane on Button click

hi sir,
i have problem in refreshing JTree on Button click inside JscrollPane
Actually I am removing scrollPane from panel and then again creating tree inside scrollpane and adding it to Jpanel but the tree is not shown inside scrollpane. here is the dummy code.
please help me.
import javax.swing.*;
import java.awt.*;
import javax.swing.tree.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class Test
public static void main(String[] args)
     JFrame jf=new TestTreeRefresh();
     jf.addWindowListener( new
     WindowAdapter()
     public void windowClosing(WindowEvent e )
     System.exit(0);
     jf.setVisible(true);
class TestTreeRefresh extends JFrame
     DefaultMutableTreeNode top;
JTree tree;
     JScrollPane treeView;
     JPanel jp=new JPanel();
     JButton jb= new JButton("Refresh");
TestTreeRefresh()
setTitle("TestTree");
setSize(500,500);
getContentPane().setLayout(null);
jp.setBounds(new Rectangle(1,1,490,490));
jp.setLayout(null);
top =new DefaultMutableTreeNode("The Java Series");
createNodes(top);
tree = new JTree(top);
treeView = new JScrollPane(tree);
treeView.setBounds(new Rectangle(50,50,200,200));
jb.setBounds(new Rectangle(50,300,100,50));
jb.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
          jp.remove(treeView);
          top =new DefaultMutableTreeNode("The Java ");
createNodes(top);
          tree = new JTree(top);
               treeView = new JScrollPane(tree);
               treeView.setBounds(new Rectangle(50,50,200,200));
               jp.add(treeView);
               jp.repaint();
jp.add(jb);
jp.add(treeView);
getContentPane().add(jp);
private void createNodes(DefaultMutableTreeNode top) {
DefaultMutableTreeNode category = null;
DefaultMutableTreeNode book = null;
category = new DefaultMutableTreeNode("Books for Java Programmers");
top.add(category);
book = new DefaultMutableTreeNode("The Java Tutorial: A Short Course on the Basics");
category.add(book);
book = new DefaultMutableTreeNode("The Java Tutorial Continued: The Rest of the JDK");
category.add(book);
book = new DefaultMutableTreeNode("The JFC Swing Tutorial: A Guide to Constructing GUIs");
category.add(book);
book = new DefaultMutableTreeNode("Effective Java Programming Language Guide");
category.add(book);
book = new DefaultMutableTreeNode("The Java Programming Language");
category.add(book);
book = new DefaultMutableTreeNode("The Java Developers Almanac");
category.add(book);
category = new DefaultMutableTreeNode("Books for Java Implementers");
top.add(category);
book = new DefaultMutableTreeNode("The Java Virtual Machine Specification");
category.add(book);
book = new DefaultMutableTreeNode("The Java Language Specification");
category.add(book);
}

hi sir ,
thaks for u'r suggession.Its working fine but the
properties of the previous tree were not working
after setModel() property .like action at leaf node
is not working,I'm sorry but I don't understand. I think you are saying that the problem is solved but I can read it to mean that you still have a problem.
If you still have a problem then please post some code (using the [code] tags of course).

Custom column headers for JTable in JScrollPane

I want a heirachical header structure on a scrolled JTable. I've successfully generated a second JTableHeader which moves it's tabs with the normal header. If I add the secondary JTableHeader into the container above the whole scroll pane it's does almost what I want, but it's not quite correctly aligned.
What I want to do is to put both the automaticaly generated JTableHeader and my extra one into the JScrollPane's column header area.
I wrapped the two headers together into a vertical Box and tried calling the setColumnHeaderView() on the scrollpane, and then creating a JViewport and using setColumnHeader(). Niether seems to have any effect. The basic table header obstinately remains unaltered.
There seems to be some special processing going on when JTable and JScrollPane get together, but I can't understand how replacing the column header viewport can be ineffective.

Thanks. I think I've just cracked it more thoroughly, though. [I found this bug report|http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5032464]. This has guided me to a work-around that seems stable so far. I'm using an extended JTable class anyway (mostly to do with table header width behaviour). I've added a field to my own table class and the following override:
The trick is to work out where the dirty deed is done, having search all the scroll pane related classes for special casing JTable.
public class STable extends JTable {
    @Override
    protected void configureEnclosingScrollPane() {
        if (secondaryHeader == null) {
            super.configureEnclosingScrollPane();
        } else {
            Container p = getParent();
            if (p instanceof JViewport) {
                Container gp = p.getParent();
                if (gp instanceof JScrollPane) {
                    JScrollPane scrollPane = (JScrollPane) gp;
                    // Make certain we are the viewPort's view and not, for
                    // example, the rowHeaderView of the scrollPane -
                    // an implementor of fixed columns might do this.
                    JViewport viewport = scrollPane.getViewport();
                    if (viewport == null || viewport.getView() != this) {
                        return;
                    JPanel hdrs = new JPanel();
                    hdrs.setLayout(new BorderLayout());
                    hdrs.add(secondaryHeader.getHeader(), BorderLayout.NORTH);
                    hdrs.add(getTableHeader(), BorderLayout.SOUTH);
                    scrollPane.setColumnHeaderView(hdrs);
                    // scrollPane.getViewport().setBackingStoreEnabled(true);
                    Border border = scrollPane.getBorder();
                    if (border == null || border instanceof UIResource) {
                        Border scrollPaneBorder =
                                UIManager.getBorder("Table.scrollPaneBorder");
                        if (scrollPaneBorder != null) {
                            scrollPane.setBorder(scrollPaneBorder);
    }I'm hopeful that will prevent the column header view from being overwritten by later layout operations.

Mouse motion listener for JTable with JScrollpane

Hi All,
I have added mouse motion listener for JTable which is added in JScrollPane. But if i move the mouse, over the vertical/horizontal scroll bars, mouse motion listener doesn't works.
So it it required to add mousemotionlistener for JTable, JScrollPane, JScrollBar and etc.
Thanks in advance.
Regards,
Tamizhan

I am having one popup window which shows address information. This window contains JTable with JScrollPane and JButton components to show the details. While showing this information window, if the mouse cursor is over popupwindow, it should show the window otherwise it should hide the window after 30 seconds.
To achieve this, i have added mouse listener to JPanel, JTable, JButton and JScrollPane. so if the cursor is in any one of the component, it will not hide the window.
but for this i need to add listener to all the components in the JPanel. For JScrollPane i have to add horizontal, vertical and all the top corner buttons of Scroll bar.
Is this the only way to do this?

JTable inside JTable cell

Hello. I'm trying to see if it's at all possible to have a JTable inside a JTable cell. I tried modifying those 'JButton inside JCell' examples, to no avail - it seems I didn't actually grasp the idea.
so anyway - did anyone ever do that? have a table inside a table? anyone can point me in the right direction?
thanks.

Hello. I'm trying to see if it's at all possible to
have a JTable inside a JTable cell. I tried modifying
those 'JButton inside JCell' examples, to no avail -
it seems I didn't actually grasp the idea.It is possible, but I think it would make things confusing for the user. What exactly are you wanting to display?
>
so anyway - did anyone ever do that? have a table
inside a table? anyone can point me in the right
direction?You need a custom renderer and custom editor and most likely custom TableModels for each table. There are row height issues as well, especially if the rows/columns of the inner tables are variable. The getValueAt() method will require some thought. What is the value associated with all the cells in the inner table?
All in all, this is doable, but may not be desirable.
>
thanks.

JTextPane inside JScrollPane

Hi,
I've seen a lot of possibilities to get a JTextPane into JScrollPane without wraping the text in the forum. None worked for me..
My situation:
JTextPane(editable=false) with given text(DefaultStyledDocument) is inside JScrollPane.
I replace (by pressing a button) some text parts with longer text AND JTextPane wraps it!..
I tried to set the size of the textPane to the computed line width of the longst line, but nothing happened.. (I expected the JScrollPane to show off horizontal scrollbar, because the width of JTextPane is getting bigger than the width of JScrollPane).
Anyone knows how to put formatted text into text- or scrollpane without wraping it?
And who allowed JTextPane to wrap my lines anyway?!
(it's called StyledDocument and not ChaosDocument :)
Thanks in advance!
Raman.

Not sure that JTextPane is the best place to start. The wrapping is controlled by ParagraphView and its underlying structure. Try looking at implementing extensions to the standard EditorKit/ViewFactory to tweak this behaviour

Editable jtable inside a jtree

I want to create an editable jtable inside a jtree. can anyone show me how to do it? thank you.

I want to create an editable jtable inside a jtree. can anyone show me how to do it? thank you.

JTable inside JOptionPane

How can I put a JTable inside a JOptionPane with collumns like:
Boolean, String, DoubleI still need some EventHandler to the first collumn.
I would appreciate any example about that.
Thanks.

JOptionPane takes an Object as its 'message' parameter. Pass your table or other component in there.

Swing: when trying to get the values from a JTable inside an event handler

Hi,
I am trying to write a graphical interface to compute the Gauss Elimination procedure for solving linear systems. The class for computing the output of a linear system already works fine on console mode, but I am fighting a little bit to make it work with Swing.
I put two buttons (plus labels) and a JTextField . The buttons have the following role:
One of them gets the value from the JTextField and it will be used to the system dimension. The other should compute the solution. I also added a JTable so that the user can type the values in the screen.
So whenever the user hits the button Dimensiona the program should retrieve the values from the table cells and pass them to a 2D Array. However, the program throws a NullPointerException when I try to
do it. I have put the code for copying this Matrix inside a method and I call it from the inner class event handler.
I would thank you very much for the help.
Daniel V. Gomes
here goes the code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import AdvanceMath.*;
public class MathF2 extends JFrame {
private JTextField ArrayOfFields[];
private JTextField DimOfSis;
private JButton Calcular;
private JButton Ativar;
private JLabel label1;
private JLabel label2;
private Container container;
private int value;
private JTable DataTable;
private double[][] A;
private double[] B;
private boolean dimensionado = false;
private boolean podecalc = false;
public MathF2 (){
super("Math Calcs");
Container container = getContentPane();
container.setLayout( new FlowLayout(FlowLayout.CENTER) );
Calcular = new JButton("Resolver");
Calcular.setEnabled(false);
Ativar = new JButton("Dimensionar");
label1 = new JLabel("Clique no bot�o para resolver o sistema.");
label2 = new JLabel("Qual a ordem do sistema?");
DimOfSis = new JTextField(4);
DimOfSis.setText("0");
JTable DataTable = new JTable(10,10);
container.add(label2);
container.add(DimOfSis);
container.add(Ativar);
container.add(label1);
container.add(Calcular);
container.add(DataTable);
for ( int i = 0; i < 10 ; i ++ ){
for ( int j = 0 ; j < 10 ; j++) {
DataTable.setValueAt("0",i,j);
myHandler handler = new myHandler();
Calcular.addActionListener(handler);
Ativar.addActionListener(handler);
setSize( 500 , 500 );
setVisible( true );
public static void main ( String args[] ){
MathF2 application = new MathF2();
application.addWindowListener(
new WindowAdapter(){
public void windowClosing (WindowEvent event)
System.exit( 0 );
private class myHandler implements ActionListener {
public void actionPerformed ( ActionEvent event ){
if ( event.getSource()== Calcular ) {
if ( event.getSource()== Ativar ) {
//dimensiona a Matriz A
if (dimensionado == false) {
if (DimOfSis.getText()=="0") {
value = 2;
} else {
value = Integer.parseInt(DimOfSis.getText());
dimensionado = true;
Ativar.setEnabled(false);
System.out.println(value);
} else {
Ativar.setEnabled(false);
Calcular.setEnabled(true);
podecalc = true;
try {
InitValores( DataTable, value );
} catch (Exception e) {
System.out.println("Erro ao criar matriz" + e );
private class myHandler2 implements ItemListener {
public void itemStateChanged( ItemEvent event ){
private void InitValores( JTable table, int n ) {
A = new double[n][n];
B = new double[n];
javax.swing.table.TableModel model = table.getModel();
for ( int i = 0 ; i < n ; i++ ){
for (int j = 0 ; j < n ; j++ ){
Object temp1 = model.getValueAt(i,j);
String temp2 = String.valueOf(temp1);
A[i][j] = Double.parseDouble(temp2);

What I did is set up a :
// This code will setup a listener for the table to handle a selection
players.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ListSelectionModel rowSM = players.getSelectionModel();
rowSM.addListSelectionListener(new Delete_Player_row_Selection(this));
//Class will take the event and call a method inside the Delete_Player object.
class Delete_Player_row_Selection
implements javax.swing.event.ListSelectionListener
Delete_Player adaptee;
Delete_Player_row_Selection (Delete_Player temp)
adaptee = temp;
public void valueChanged (ListSelectionEvent listSelectionEvent)
adaptee.row_Selection(listSelectionEvent);
in the row_Selection function
if(ex.getValueIsAdjusting()) //To remove double selection
return;
ListSelectionModel lsm = (ListSelectionModel) ex.getSource();
if(lsm.isSelectionEmpty())
System.out.println("EMtpy");
else
int selected_row = lsm.getMinSelectionIndex();
ResultSetTableModel model = (ResultSetTableModel) players.getModel();
String name = (String) model.getValueAt(selected_row, 1);
Integer id = (Integer) model.getValueAt(selected_row, 3);
This is how I got info out of a table when the user selected it

Install Application - TextArea inside JScrollPane

I've been working on an install application to install another one of my programs (next/accept/next/ finish type of thing) and had a couple questions and would appreciate any help anyone can give.
Some Background info:
I made images and have them display as image icons through jlabels for the buttons and background. The labels have classes applying various mouselisteners (Mousepressed, MouseEntered, MouseExited, etc) changing the images and moving from screen to screen. I have my layout set to null, not for any particular reason, but because I have no formal education in layout managers.
1) Is there a conical solution to moving through various windows? That is, right now I move through the various 'screens' with a check on an int called state, that gets incremented and decremented through forward and back buttons. I looked at some code given to us on a test by our teacher (we had to find bugs) and saw that he had implemented a fake "state" interface, with constants like "Account_State" to control where you were in the program. This seems a bit easier to read than ints, but is there a correct built in version of his states?
2) On the second screen I have a license agreement (actually required for the application that gets installed), and a checkbox. The license is held inside of a JTextArea(scroll) inside a JScrollPane(textscroll). The JScrollPane is extending in weird ways. The following is a stripped down version of my code (it runs and demonstrates the problem):
InstalleApp
import javax.swing.*;
import java.awt.*;
public class InstalleApp {
    public static void main(String args[]) {
        InstalleFrame m = new InstalleFrame();
           Container content = m.getContentPane();
        m.setDefaultCloseOperation(3);
        m.setSize(550, 400);
        m.setUndecorated(true);
        m.setVisible(true);
        m.setTitle("Install");
}InstalleFrame
import java.awt.*;
import javax.swing.*;
import javax.swing.JFrame;
import java.awt.event.*;
import java.awt.Rectangle;
import java.awt.Font;
import java.awt.BorderLayout;
import java.util.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import java.awt.event.ActionEvent;
import javax.swing.text.BadLocationException;
import javax.swing.JSlider;
import java.awt.Dimension;
public class InstalleFrame
    extends JFrame implements ActionListener {
public InstalleFrame() {
    try {
      jbInit();
    catch (Exception ex) {
      ex.printStackTrace();
public void actionPerformed(ActionEvent e) {
JScrollPane textscroll;
private void jbInit() throws Exception {
    this.getContentPane().setLayout(null);
    this.getContentPane().setBackground(UIManager.getColor("window"));
    background.setBounds(new Rectangle(0, 0, 550, 400));
    readcheck.setOpaque(false);
    readcheck.setText("I have read and accept the license agreement");
    readcheck.setBounds(new Rectangle(31, 357, 319, 32));
    scroll.setWrapStyleWord(true);
    scroll.setLineWrap(true);
    scroll.setText(
        "Copyright ? 2006-2007 GonZor228.com \n\nBy using or distributing this " +
        "software (or any work based on the software) you shall be deemed " +
        "to have accepted the terms and conditions set out below.\n\nGonZor228.com " +
        "(\"GonZor\") is making this software freely available on the basis " +
        "that it is accepted as found and that the user checks its fitness " +
        "for purpose prior to use.\n\nThis software is provided \'as-is\', without " +
        "any express or implied warranties whatsoever. In no event will the " +
        "authors, partners or contributors be held liable for any damages, " +
        "claims or other liabilities direct or indirect, arising from the " +
        "use of this software.\n\nGonZor will from time to time make software " +
        "updates available. However, GonZor accepts no obligation to provide " +
        "any support to free license holders.\n\nGonZor grants you a limited " +
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        "GonZor228.com\n8. You acknowledge that GonZor owns the copyright and " +
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        "licensors (collectively ?Associates?) do not represent that the software " +
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        "of any kind, whether express or implied, relating to the software " +
        "and any data accessed there from, or the accuracy, timeliness, completeness, " +
        "or adequacy of the software and any data accessed there from, including " +
        "the implied warranties of title, merchantability, satisfactory quality, " +
        "fitness for a particular purpose, and non-infringement.\n\nIf the " +
        "software or any data accessed there from proves defective, you (and " +
        "not the Associates) assume the entire cost of all repairs or injury " +
        "of any kind, even if the Associates have been advised of the possibility " +
        "of such a defect or damages. Some jurisdictions do not allow restrictions " +
        "on implied warranties so some of these limitations may not apply " +
        "to you.\n\n5. \tLimitation of liability.\n\nThe Associates will not " +
        "be liable to you for claims and liabilities of any kind arising out " +
        "of or in any way related to the use of the software by yourself or " +
        "by third parties, to the use or non-use of any brokerage firm or " +
        "dealer, or to the sale or purchase of any security, whether such " +
        "claims and liabilities are based on any legal or equitable theory." +
        "\n\nThe Associates are not liable to you for any and all direct, incidental, " +
        "special, indirect, or consequential damages arising out of or related " +
        "to any third-party software, any data accessed through the software, " +
        "your use or inability to use or access the software, or any data " +
        "provided through the software, whether such damage claims are brought " +
        "under any theory of law or equity. Damages excluded by this clause " +
        "include, without limitation, those for loss of business profits, " +
        "injury to person or property, business interruption, loss of business " +
        "or personal information. Some jurisdictions do not allow limitation " +
        "of incidental or consequential damages so this restriction may not " +
        "apply to you.\n\nInformation provided through the software may be " +
        "delayed, inaccurate, or contain errors or omissions, and the Associates " +
        "will have no liability with respect thereto. GonZor may change or " +
        "discontinue any aspect or feature of the software or the use of all " +
        "or any features or technology in the software at any time without " +
        "prior notice to you, including, but not limited to, content, hours " +
        "of availability.\n\n6. \tControlling Law.\n\nThis software license " +
        "and the relationship between you and GonZor is governed by the laws " +
        "of Australia without regard to its conflict of law provisions. You " +
        "and GonZor agree to submit to the personal and exclusive jurisdiction " +
        "of the courts located within Australia. The United Nations Convention " +
        "on the International Sale of Goods does not apply to this software " +
        "license.\n\n7.\tPrecedence.\n\nThis software license constitutes the " +
        "entire understanding between the parties respecting use of the software, " +
        "superseding all prior agreements between you and GonZor.\n\n8.\tSurviving " +
        "Provisions.\n\nSections 1, and 3 through 5, will survive any termination " +
        "of this Agreement.\n\n---------------------------------------------------------------------------------" +
        "---\nIf you accept the terms of the agreements, click I Agree to continue. " +
        " You must accept the agreement to download and use the software. ");
    scroll.setBounds(new Rectangle(36, 36, 478, 305));
    this.getContentPane().add(readcheck);
    readcheck.setVisible(false);
   this.getContentPane().add(scroll);
   textscroll = new JScrollPane (scroll, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                                            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    textscroll.setBounds(36,36,400,400);
      getContentPane().add( textscroll );
    this.getContentPane().add(background);
JLabel background = new JLabel();
JCheckBox readcheck = new JCheckBox();
JTextArea scroll = new JTextArea();
}Sorry about all the text for the agreement. I've tried a number of different things I got from searching the forums at different points in the code (setting the number of rows/columns, setting max and min sizes, etc etc) The code above that wraps the text I could have sworn I tried 3 times before it magically worked... I also tried using the awt component for textareas that had the scrollbars built in, but scrapped it after having even more difficulties with that one. I'm trying to get the textbox to only go down about 300 px and 300 px to the right. Using the graphical editor to change it produces a null pointer error at compile time(?!?). Can anyone help me to get the textbox to render as I want it to?
Edited by: rpk5000 on Jan 27, 2008 9:43 AM

for instance, boxlayout would work nicely with the installer frame (or dialog)
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class InstalleFrame
    public InstalleFrame()
        try
            jbInit();
        catch (Exception ex)
            ex.printStackTrace();
    private JScrollPane textscroll;
    private JPanel contentPane = new JPanel();
    private JLabel background = new JLabel();
    private JCheckBox readcheck = new JCheckBox();
    private JTextArea scroll = new JTextArea();
    private void jbInit() throws Exception
        contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.PAGE_AXIS));
        contentPane.setBackground(UIManager.getColor("window"));
        contentPane.setBorder(BorderFactory.createEmptyBorder(15, 15, 15, 15));
        scroll.setWrapStyleWord(true);
        scroll.setLineWrap(true);
        String text = "Copyright ? 2006-2007 GonZor228.com \n\nBy using or distributing this "
                        + "software (or any work based on the software) you shall be deemed "
                        + "to have accepted the terms and conditions set out below.\n\nGonZor228.com "
                        + "(\"GonZor\") is making this software freely available on the basis "
                        + "that it is accepted as found and that the user checks its fitness "
                        + "for purpose prior to use.\n\nThis software is provided \'as-is\', without "
                        + "any express or implied warranties whatsoever. In no event will the "
                        + "authors, partners or contributors be held liable for any damages, "
                        + "claims or other liabilities direct or indirect, arising from the "
                        + "use of this software.\n\nGonZor will from time to time make software "
                        + "updates available. However, GonZor accepts no obligation to provide "
                        + "any support to free license holders.\n\nGonZor grants you a limited "
                        + "non-exclusive license to use this software for any purpose that does "
                        + "not violate any laws that apply to your person in your current jurisdiction, "
                        + "subject to the following restrictions: \n\n\nblah, blah, blah,..."
                        + "\n\n";
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 5; i++)
            sb.append(text);
        scroll.setText(sb.toString());
        contentPane.add(readcheck);
        contentPane.add(scroll);
        textscroll = new JScrollPane(scroll,
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        textscroll.setPreferredSize(new Dimension(400, 400));
        contentPane.add(textscroll);
        JPanel bottomPane = new JPanel();
        bottomPane.setOpaque(false);
        final JButton okButton = new JButton("OK");
        final JButton cancelButton = new JButton("Cancel");
        okButton.setEnabled(false);
        readcheck.setOpaque(false);
        readcheck.setText("I have read and accept the license agreement");
        readcheck.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                JCheckBox radioBtn = (JCheckBox)e.getSource();
                if (radioBtn.isSelected())
                    okButton.setEnabled(true);
                else
                    okButton.setEnabled(false);
        okButton.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                // TODO: whatever needs to be done here
        cancelButton.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                SwingUtilities.getWindowAncestor(contentPane).dispose();
        bottomPane.add(readcheck);
        bottomPane.add(okButton);
        bottomPane.add(cancelButton);
        contentPane.add(bottomPane);
        //readcheck.setVisible(false);
        contentPane.add(background);
    public JPanel getContentPane()
        return contentPane;
    public static void main(String[] args)
        EventQueue.invokeLater(new Runnable()
            public void run()
                InstalleFrame install = new InstalleFrame();
                JFrame frame = new JFrame("Install");
                frame.getContentPane().add(install.getContentPane());
                frame.setDefaultCloseOperation(3);
                frame.setSize(550, 400);
                frame.setUndecorated(false); //**
                frame.pack(); //**
                frame.setLocationRelativeTo(null); //**
                frame.setVisible(true);
}

JTable in JScrollpane doesn't appear

Hi,
Maybe, it's already asked 1000 times on this forum but I didn't found the right solution.
My problem :
I've created a JPanel with a JScrollpane.
When I create the JScrollpane immediately with a JTable it works fine, the JTable appears.
Now I try to add the JTable dynamically to the JScrollpane.
The JTable doesn't appear.
I've tried already the repaint, validate methods but that changes nothing.
Can anyone tell me how I can solve my problem ?
Thanx in advance,
Piet

I trust you are adding it like this:
myJScrollPane.getViewport().add(myJTable);
not like this:
myJScrollPane.add(myJTable);

JTable in JScrollPane auto resize refresh problem

Hello,
I have a JTable in a JScrollPane. Number of rows is changing.
I'm using the following to auto-resize JScrollPane.
public Dimension getPreferredSize() {
              Dimension size = super.getPreferredSize();
              size.height -= getViewport().getPreferredSize().height;
              Component view = getViewport().getView();
              if(view != null)
              size.height += view.getPreferredSize().height;
              return size;
         }There is a JButton, which adds an empty row to the JTable. It all works fine, except the auto-resize when a new row is added. I want all rows of JTable to be visible, with no scrollbars present. I tried repaint(), revalidate(), addNotify(). What should I do?
Thanks.

Sure
DefaultTableModel dtm = new DefaultTableModel(vec, header);
          jt0 = new JTable(dtm);
          jt0.getTableHeader().setReorderingAllowed(false);
          jt0.setFont(new Font("Tahoma", Font.PLAIN, 12));
          jt0.getTableHeader().setFont(new java.awt.Font("Tahoma", java.awt.Font.BOLD, 12));
          jt0.setRowHeight(18);
        jt0.setPreferredScrollableViewportSize(new Dimension(500, jt0.getRowCount() * jt0.getRowHeight()));
        jt0.setFillsViewportHeight(false);
          jsp0 = new JScrollPane(jt0);
GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(2,1,2,1);
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        JPanel p0 = new JPanel(new GridBagLayout());
        gbc.fill = gbc.HORIZONTAL;
        p0.add(jsp0, gbc);
          JButton jb1 = new JButton("add row");
          jb1.setSize(40, 18);
jb1.addActionListener(new java.awt.event.ActionListener() {
               public void actionPerformed(java.awt.event.ActionEvent e) {
                    dtm.addRow(new Object[]{....});
//                    jt0.scrollRectToVisible(jt0.getCellRect(jt0.getModel().getRowCount()-1, 1, false));
//                    jt0.setRowSelectionInterval(jt0.getModel().getRowCount()-1, jt0.getModel().getRowCount()-1);
    public class SizeX extends JScrollPane {
         public Dimension getPreferredSize() {
              Dimension size = super.getPreferredSize();
              size.height -= getViewport().getPreferredSize().height;
              Component view = getViewport().getView();
              if(view != null)
              size.height += view.getPreferredSize().height;
              return size;
    }

Resize jtable in jscrollpane

Hi,
I have a frame containing a JTable and a panel with buttons. When the window gets resized, I would like that the jtable takes the extra space and that the button panel stays the same. How can I do that? The jtable panel is already the "Center" and both panels stay the same...
Thanks,
Marie
Here's the code:
package test;
import javax.swing.*;
import java.awt.AWTEvent;
import java.awt.event.WindowEvent;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class Testframe extends JFrame {
    private JPanel mainPanel = new JPanel();
    private JPanel buttonPanel = new JPanel();
    private JPanel tablePanel = new JPanel();
    //Button panel
    private JButton applyTableBt = new JButton("Generate Table");
    private JButton addBt = new JButton("Add");
    private JButton editBt = new JButton("Edit");
    private JButton deleteBt = new JButton("Delete");
    private JButton matchBt = new JButton("Find");
    private JButton saveBt = new JButton("Save to file");
    private JButton loadBt = new JButton("Load from file");
     * Constructor.
     * @param a_parent Frame
    protected Testframe() {
        enableEvents(AWTEvent.WINDOW_EVENT_MASK);
        try {
            jbInit();
            this.setResizable(true);
            this.setVisible(true);
            pack();
        } catch (Exception e) {
            e.printStackTrace();
     * Initialization of the dialog.
     * @throws Exception
    private void jbInit() throws Exception {
        this.setTitle("Pattern management - CAT");
        Object[][] data = { {"11", "12", "13", "14", "15", "16", "17", "18"},
                          {"21", "22", "23", "24", "25", "26", "27", "28"}
        Object[] names = {"col1", "col2", "col3", "col4", "col5", "col6",
                         "col7", "col8"};
        JTable table = new JTable(data, names);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        //table.setColu
        TableColumnModel colModel = table.getColumnModel();
        for (int i = 0; i < table.getColumnCount(); i++) {
            TableColumn column = colModel.getColumn(i);
            column.setPreferredWidth(511);
        JScrollPane scrollPane = new JScrollPane(table);
        tablePanel.add(scrollPane);
        //Layout = vertical box with vertical gap
        buttonPanel.setLayout(new GridLayout(7, 1, 0, 5));
        buttonPanel.add(applyTableBt);
        buttonPanel.add(addBt);
        buttonPanel.add(editBt);
        buttonPanel.add(deleteBt);
        buttonPanel.add(matchBt);
        buttonPanel.add(saveBt);
        buttonPanel.add(loadBt);
        //mainPanel.setLayout(new BorderLayout());
        mainPanel.add(tablePanel, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.EAST);
        this.setContentPane(mainPanel);
     * Overrides this class to call the good method when the dialog is closed.
     * @param a_windowE WindowEvent
    protected void processWindowEvent(WindowEvent a_windowE) {
        //If it is a request to close the window (X)
        if (a_windowE.getID() == WindowEvent.WINDOW_CLOSING) {
            cancel();
        super.processWindowEvent(a_windowE);
     * Closes the dialog.
    private void cancel() {
        dispose();
    private static void createAndDisplayFrame() {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);
        new Testframe();
    public static void main(String[] args) {
        createAndDisplayFrame();
}

try changing these lines
mainPanel.add(tablePanel, BorderLayout.CENTER);
mainPanel.add(buttonPanel, BorderLayout.EAST);
this.setContentPane(mainPanel);
to this
mainPanel.add(buttonPanel, BorderLayout.EAST);
getContentPane().add(scrollPane, BorderLayout.CENTER);
getContentPane().add(mainPanel, BorderLayout.EAST);

JTable inside JScrollPane

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