JTable with JCheckBox
Hi,
Does anyone know how to make the selection on check boxes in a JTable limited to one?
Currently the check box column in my JTable allow for multiple selection, but I want to make it so that only one check box can be selected at a time.
thanks
maybe you can make a checker??
for instance: checkbox one is clicked
I click at checbox three and my programm is checking every checkbox on his selected value, if that value is truu then you set that value to false .... and at the end if every check box is false you set the one you clicked to true....
maybe you can do this at once in a for or while loop or something of in a switch statement
Similar Messages
-
JTable with JCheckbox problems
Ok so I have a couple of questions. I have a JTable with a column represented as a checkbox.
1. If I put the checkbox column as the first in the table, the rest of the cells are blank/null. Any idea what the reason is?
2. What is the best workaround to having draggable columns, meaning icons/checkboxes don't render if you move the columns around?
3. Does anyone have some links to good resources on JTables and things like custom components in them. I have googled but don't get many good links so would appreciate any help
Code snippet as follows:
public class ClobberTableCellRenderer implements TableCellRenderer
private JPanel renderPanel = new JPanel(new BorderLayout());
private JLabel renderLbl = new JLabel("");
private JCheckBox checked = new JCheckBox();
private Icon successIcon;
private Icon errorIcon;
public Component getTableCellRendererComponent(JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column)
String columnName = table.getModel().getColumnName(column);
if (value == null)
return null;
else if ("Status".equals(columnName) && "ok".equals(value))
renderLbl.setIcon(successIcon);
renderLbl.setText("");
renderPanel.remove(checked);
else if ("Status".equals(columnName) && "error".equals(value))
renderLbl.setIcon(errorIcon);
renderLbl.setText("");
renderPanel.remove(checked);
else if ("Active".equals(columnName))
renderLbl.setText("");
renderPanel.add(checked);
renderPanel.setBackground(Color.white);
else
renderLbl.setHorizontalAlignment(value instanceof Date || value instanceof Number ? JLabel.RIGHT : JLabel.LEFT);
renderLbl.setIcon(null);
renderLbl.setText(value instanceof Date ? df.format((Date)value) : value.toString());
renderLbl.setToolTipText(null);
renderPanel.setToolTipText(null);
renderPanel.remove(checked);
if (isSelected)
renderPanel.setBackground((Color)UIManager.getDefaults().get("Table.selectionBackground"));
else
renderPanel.setBackground((Color)UIManager.getDefaults().get("Table.background"));
return renderPanel;
}Hi :) I have also worked on JTables and JCheckBoxes before. This article
helped me a lot: http://www-128.ibm.com/developerworks/java/library/j-jtable/ -
Problem with JTable with JCheckBox as Header
Hi,
We have a JCheckBox as JTable Header. And respective data in that column also check boxes. For data check boxes, just i am sending Boolean object to object[][] data array. I am getting check Boxes as data components.
For Header, i have create a TableRender object which is returning JCheckBox.
Here my problem is,
1) When i select a Header check box, all the check boxes are getting selected.
2) Now we can reselect an data Check Box. When i reselect any data checkBox, Header CheckBox should be reselected. This is not happening. I was tried lot. Can any body give a solution to solve this problem.
Please .... Please ...
Thanks
Mohanjust call this method with null param on the JTable
table.setTableHeader(null);
cheers
krishna -
Detecting clicked column in JTable (with JCheckBox in column)
I am struggling with something that seems like it should be so simple, but it doesn't work as I expect;
I have a table with 5 columns, the 5th column is a CheckBox. What I need to do is detect when the 5th column changes, ie. the check box is clicked;
If I use a MouseListener on the table, and derive the table from the event, the column that I get back from getSelectedColumn() is -1, which is not conclusive. I assume this is because clicking the check box is not actually selecting the column.
I implemented a TableModelListener as follow;
tableModel.addTableModelListener(new TableModelListener()
public void tableChanged(TableModelEvent e)
System.out.println("Changed Column is " + e.getColumn() + " " + e.getFirstRow());
This seems to do the same as before, and gives a first row of 0 and selected column of -1. Once again inconclusive.
The cell as I say is rendered as a JCheckBox, the data in the table model obviously being Boolean.
Can anyone suggest how I can determine if my column with a Check Box in has been clicked, and if so, which Row? (I have thought about overriding JCheckBox, but this seems more work than necessary)
Thanks in anticipationYou need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html]
that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on
the information provided.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting] so the posted code retains its original formatting. -
Problem with JCheckBox in a JTable
Hello,
I have a JTable with JCheckBox as Editor for boolean values.
I added a ListSelectionListener on that JTable.
My problem is :
when I click on a cell which have a JCheckBoxEditor, there is only one event generated : the one which unselect the row previously selected.
So i can't answer the selection.
what could have append ?
thanks a lot.
fleur.hi,
I have no custom editor for this table.
here is my code :
public VDEComposant(Locale langue,InterfaceModeleur listener,Composant composant,int largeur) {
super(langue,listener,largeur);
this.setLayout(new BorderLayout());
_modele=listener.getModele();
_composantCourant=composant;
this.addComposantsListener((ComposantsListener)listener.getGestionnaire());
construitBarreOutils();
setNbLigne1(this.listeComposant(composant).size());
int m=0;
if (composant==Composant.COMPOSANT){
_donCompPereApTM=this.creeModeleDonnee1(composant);
_donCompPereApTM.addTableModelListener(this);
setTableau1(new JTable(_donCompPereApTM));
m=1;
else{
if (composant.getPere()==Composant.COMPOSANT){
_donCompApTM=creeModeleDonnee1(composant);
_donCompApTM.addTableModelListener(this);
setTableau1(new JTable(_donCompApTM));
else {
_donCompUtTM=creeModeleDonnee1(composant);
_donCompUtTM.addTableModelListener(this);
setTableau1(new JTable(_donCompUtTM));
getTableau1().addMouseListener(((OngletDonnees)((OngletDonnees)getIHM().getOngletDonnees())).getOngletComposants());
MultipleComboBoxCellEditor editor = new MultipleComboBoxCellEditor(new JComboBox());
getTableau1().getColumnModel().getColumn(4+m).setCellEditor(editor) ;
getTableau1().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
getTableau1().getSelectionModel().addListSelectionListener(this);
Dimension d1 = new Dimension(_largeur, getNbLigne1()*16);
JScrollPane sc1 = new JScrollPane(getTableau1());
sc1.setViewportView(getTableau1());
if((composant.getPere()!=null)&&(composant.getPere()!=Composant.COMPOSANT)){
this.add(_outils,BorderLayout.NORTH);
String s="";
if((composant.getPere()==null)||(composant.getPere()==Composant.COMPOSANT)){
String sc="";
if(composant==Composant.COMPOSANT_IMAGE){
sc=" "+_ressources.getString("images");
if(composant==Composant.COMPOSANT_LINEAIRE){
sc=" "+_ressources.getString("lineaires");
if(composant==Composant.COMPOSANT_METAD){
sc=" "+_ressources.getString("lotdonnees");
if(composant==Composant.COMPOSANT_NGS){
sc=" "+_ressources.getString("nongraphiques");
if(composant==Composant.COMPOSANT_SURFACIQUE){
sc=" "+_ressources.getString("surfaciques");
if(composant==Composant.COMPOSANT_SYMBOLIQUE){
sc=" "+_ressources.getString("symboliques");
s=_ressources.getString("liste_composant")+sc;
else{
s=_ressources.getString("description_composant");
JLabel lab = new JLabel(s,JLabel.CENTER);
JPanel inter = new JPanel(new GridLayout(1,1));
inter.add(lab);
inter.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createRaisedBevelBorder(),BorderFactory.createEtchedBorder()));
Box boite1 = Box.createVerticalBox();
boite1.add(inter);
boite1.add(sc1);
_inter.add(boite1);
//ajout du deuxieme tableau
_donAttCompTM=this.creeModeleDonnee2(composant);
_donAttCompTM.addTableModelListener(this);
setTableau2(new JTable(_donAttCompTM));
getTableau2().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
getTableau2().getSelectionModel().addListSelectionListener(this);
getTableau2().addMouseListener(((OngletDonnees)((OngletDonnees)getIHM().getOngletDonnees())).getOngletComposants());
//ComboBox pour saisir le type de l'attribut
_typeA = new JComboBox();
_typeA.addItem(TypeEtendu.DATE.getNom());
_typeA.addItem(TypeEtendu.DOMAINE.getNom());
_typeA.addItem(TypePrimitif.ENTIER.getNom());
_typeA.addItem(TypePrimitif.LOGIQUE.getNom());
_typeA.addItem(TypePrimitif.REEL.getNom());
_typeA.addItem(TypePrimitif.TEXTE.getNom());
(getTableau2().getColumnModel().getColumn(3)).setCellEditor(new DefaultCellEditor(_typeA));;
//renderer pour la colonne des nom qui indique en gras l'attribut identifiant
getTableau2().getColumnModel().getColumn(1).setCellRenderer(new AttributTableCellRenderer(_composantCourant));
Dimension d2 = new Dimension(_largeur ,(getNbLigne2()*16));
JScrollPane sc2 = new JScrollPane(getTableau2());
sc2.setViewportView(getTableau2());
_inter.createVerticalStrut(16);
inter = new JPanel(new GridLayout(1,1));
lab = new JLabel(_ressources.getString("attributs"),JLabel.CENTER);
inter.add(lab);
inter.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createRaisedBevelBorder(),BorderFactory.createEtchedBorder()));
Box boite2=Box.createVerticalBox();
boite2.add(inter);
boite2.add(sc2);
_inter.add(boite2);
if((composant.getPere()!=null)&&(composant.getPere()!=Composant.COMPOSANT)){
this.add(_inter,BorderLayout.CENTER);
else{
this.add(_inter,BorderLayout.NORTH);
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting()) return;
ListSelectionModel lsm =(ListSelectionModel)e.getSource();
if (lsm.isSelectionEmpty()) {
else {
int ligneSel = lsm.getMinSelectionIndex();
if(e.getSource()==getTableau2().getSelectionModel()){
String alias = (String) _donAttCompTM.getValueAt(ligneSel,1);
attribut = composantCourant.getAttribut(alias);
else if(e.getSource()==getTableau1().getSelectionModel()){
VectorTableModel vtm = null;
int i = 0;
if(_donCompApTM != null){
vtm = _donCompApTM;
if(_donCompPereApTM != null){
vtm = _donCompPereApTM;
i =1;
if(vtm != null){
String alias = (String) vtm.getValueAt(ligneSel,i);
composantSelectionne= modele.getComposant(alias);
else{
composantSelectionne=composantCourant;
I hope it make sens,
thanks. -
JTable with a JCheckBox in a header column
Hi everybody,
I have implemented a JTable with a JCheckbox in one of the header columns. For this I have used the following code from the Internet for rendering the table cell:
public class CheckBoxColumnHeader extends JCheckBox implements TableCellRenderer, MouseListener {
protected CheckBoxColumnHeader rendererComponent;
protected int column;
protected boolean mousePressed = false;
public CheckBoxColumnHeader(ItemListener itemListener) {
rendererComponent = this;
rendererComponent.addItemListener(itemListener);
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (table != null) {
JTableHeader header = (ExtendedJTableHeader)table.getTableHeader();
if (header != null) {
rendererComponent.setForeground(header.getForeground());
rendererComponent.setBackground(header.getBackground());
rendererComponent.setFont(header.getFont());
header.addMouseListener(rendererComponent);
setColumn(column);
rendererComponent.setText(value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return rendererComponent;
From a technical point of view, the checkbox works as expected. However, I have problems with the graphical layout of the checkbox in the header column:
1) The checkbox seems to be bigger than the height of the header column. It overlays the border lines of the table. When I increase the preferred size of the header row, the checkbox also increases its size and still overlays the table border lines.
2) The checkbox has a diffferent background shading than the other columns in the header.
Any help for solving these two layout problems are greatly appreciated.
Thanks, WalterHi,
here is now the complete code
package main;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Arrays;
import java.util.Vector;
import javax.swing.table.*;
* <p>�berschrift: </p>
* <p>Beschreibung: </p>
* <p>Copyright: Copyright (c) 2007</p>
* <p>Organisation: </p>
* @author unbekannt
* @version 1.0
public class MainFrame extends JFrame {
JTable table3;
JScrollPane scp3;
//Den Frame konstruieren
public MainFrame() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
//Initialisierung der Komponenten
private void jbInit() throws Exception {
this.setSize(new Dimension(500, 320));
this.setTitle("Action List");
Vector<Object> rowData = new Vector<Object>();
for (int i=0; i<3; i++) {
Vector<Object> colData = new Vector<Object>(Arrays.asList("Data R" + i + "C0", "Data R" + i + "C1", "Data R" + i +"C2", (i%2 == 0) ? Boolean.TRUE : Boolean.FALSE));
rowData.add(colData);
Vector<Object> hdr = new Vector<Object>(Arrays.asList("Column 0", "Column 1", "Column 2 (MyO)", "Column 3"));
DefaultTableModel tableM = new DefaultTableModel(rowData, hdr);
table3 = new JTable(tableM);
TableColumn tc = table3.getColumnModel().getColumn(3);
tc.setCellEditor(table3.getDefaultEditor(Boolean.class));
tc.setCellRenderer(table3.getDefaultRenderer(Boolean.class));
tc.setHeaderRenderer(new CheckBoxColumnHeader(table3, new MyItemListener()));
scp3 = new JScrollPane(table3);
scp3.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scp3.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
this.add(scp3);
//�berschrieben, so dass eine Beendigung beim Schlie�en des Fensters m�glich ist
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
public class CheckBoxColumnHeader extends JCheckBox implements TableCellRenderer, MouseListener {
protected CheckBoxColumnHeader rendererComponent;
protected int column;
protected boolean mousePressed = false;
protected JTable myTable;
public CheckBoxColumnHeader(JTable t, ItemListener itemListener) {
rendererComponent = this;
rendererComponent.addItemListener(itemListener);
myTable = t;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
JTableHeader header = null;
if (table != null) {
header = (JTableHeader)table.getTableHeader();
if (header != null) {
rendererComponent.setForeground(header.getForeground());
rendererComponent.setBackground(header.getBackground());
rendererComponent.setFont(header.getFont());
header.addMouseListener(rendererComponent);
setColumn(column);
rendererComponent.setText(value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return rendererComponent;
protected void setColumn(int column) {this.column = column; }
public int getColumn() {return column; }
protected void handleClickEvent(MouseEvent e) {
if (mousePressed) {
mousePressed=false;
JTableHeader header = (JTableHeader)(e.getSource());
JTable tableView = header.getTable();
TableColumnModel columnModel = tableView.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = tableView.convertColumnIndexToModel(viewColumn);
if (viewColumn == this.column && e.getClickCount() == 1 && column != -1) {
doClick();
public void mouseClicked(MouseEvent e) {
handleClickEvent(e);
((JTableHeader)e.getSource()).repaint();
public void mousePressed(MouseEvent e) {
mousePressed = true;
public void mouseReleased(MouseEvent e) { }
public void mouseEntered(MouseEvent e) { }
public void mouseExited(MouseEvent e) { }
public JTable getTable() {return myTable; }
public class MyItemListener implements ItemListener {
public void itemStateChanged(ItemEvent e) {
CheckBoxColumnHeader source = (CheckBoxColumnHeader)e.getSource();
if (source instanceof AbstractButton == false) return;
boolean checked = e.getStateChange() == ItemEvent.SELECTED;
for (int x = 0, y = source.getTable().getRowCount(); x < y; x++) {
source.getTable().setValueAt(new Boolean(checked),x,3);
As originally said, the checkbox in the header column overlays the table borders and also has a different background shading than the other header columns. -
Save JTable and JCheckBox content
I've made a JTable(working with DefaultTableModel). One of the columns contains JCheckBoxes. I would like to save the data into a file, but i don't know how to manage this.
Is there somebody who knows a possible solution?!
ThxI have code which can save the jtable, but i doesn't work with jcheckboxes in the jtable
CODE:
public void saveTable()
if (table.getRowCount() == 0)
System.out.println("Empty list");
return;
try
FileOutputStream fos = new FileOutputStream("data.dat");
Writer out = new OutputStreamWriter(fos,"UTF8");
for (int i = 0; i < table.getRowCount(); i++)
for(int j=0; j < table.getColumnCount(); j++)
String value = (String)table.getValueAt(i,j) + "|";
out.write(value);
out.close();
catch(IOException e)
System.out.println("Error IOException " + e.getMessage());
} -
JTable with JComboBox/JSpinner problem
The following code has a JTable with 2 columns.The lst column has JComboBoxes, the 2nd column has JSpinners.I want to set the spinner range of values based on the selection of JComboBox. The JComboBox selections are "small" and "large". For "small" the spinner should range from 0..49, for "large" from 50..99. When a selection is made, MyTable.itemStateChanged() is called, which in turn calls SpinnerEditor.setValueRange(). This sets an array with the desired values and then sets the model with this array. However, it sets the range not only for the row in which the combo box was clicked, but all rows.
So in MyTable.setCellComponents(), there is this:
spinnerEditor = new SpinnerEditor(this, defaultTableModel);
modelColumn.setCellEditor(spinnerEditor);
If the table has n rows, are n SpinnerEditors created, or just 1?
If 1, do n need to be created and if so, how?
public class MyTable extends JTable implements ItemListener {
private DefaultTableModel defaultTableModel;
private Vector<Object> columnNameVector;
private JComboBox jComboBox;
private SpinnerEditor spinnerEditor;
private final int COMBO_BOX_COLUMN = 0;
final static int SPINNER_COLUMN = 1;
public static String SMALL = "Small";
public String LARGE = "Large";
private final String[] SMALL_LARGE = {
SMALL,
LARGE };
public MyTable(String name, Object[][] variableNameArray, Object[] columnNameArray) {
columnNameVector = new Vector<Object>();
// need column names in order to make copy of table model
for (Object object : columnNameArray) {
columnNameVector.add(object);
defaultTableModel = new DefaultTableModel(variableNameArray, columnNameArray);
this.setModel(defaultTableModel) ;
setCellComponents();
setListeners();
private void setCellComponents() {
// combo box column -----------------------------------------------
TableColumn modelColumn = this.getColumnModel().getColumn(COMBO_BOX_COLUMN);
jComboBox = new JComboBox(SMALL_LARGE);
// set default values
for (int row = 0; row < defaultTableModel.getRowCount(); row++) {
defaultTableModel.setValueAt(SMALL_LARGE[0], row, COMBO_BOX_COLUMN);
modelColumn.setCellEditor(new DefaultCellEditor(jComboBox));
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for small/large"); // tooltip
modelColumn.setCellRenderer(renderer);
// index spinner column ------------------------------------------------------------
modelColumn = this.getColumnModel().getColumn(SPINNER_COLUMN);
spinnerEditor = new SpinnerEditor(this, defaultTableModel);
modelColumn.setCellEditor(spinnerEditor);
renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for index value"); // tooltip
modelColumn.setCellRenderer(renderer);
private void setListeners() {
jComboBox.addItemListener(this);
@Override
public void itemStateChanged(ItemEvent event) {
// set spinner values depending on small or large
String smallOrLarge = (String)event.getItem();
if (this.getEditingRow() != -1 && this.getEditingColumn() != -1) {
spinnerEditor.setValueRange(smallOrLarge);
public static void main(String[] args) {
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
catch (Exception e){
e.printStackTrace();
String[] columnNameArray = {"JComboBox", "JSpinner"};
Object[][] dataArray = {
{"", "0"},
{"", "0"},
{"", "0"},
final MyTable myTable = new MyTable("called from main", dataArray, columnNameArray);
final JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(myTable));
frame.setTitle("My Table");
frame.setPreferredSize(new Dimension(200, 125));
frame.addWindowListener(new WindowAdapter(){
@Override
public void windowClosing(WindowEvent e) {
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setLocation(800, 400);
frame.pack();
frame.setVisible(true);
public class SpinnerEditor extends AbstractCellEditor implements TableCellEditor {
private JComponent parent;
private DefaultTableModel defaultTableModel;
private final JSpinner spinner = new JSpinner();
private String[] spinValues;
private int row;
private int column;
public SpinnerEditor(JTable parent, DefaultTableModel defaultTableModel ) {
super();
this.parent = parent;
this.defaultTableModel = defaultTableModel;
setValueRange(MyTable.SMALL);
// update every time spinner is incremented or decremented
spinner.addChangeListener(new ChangeListener(){
public void stateChanged(ChangeEvent e) {
String value = (String) spinner.getValue();
System.out.println ("SpinnerEditor.stateChanged(): " + value);
setValue(value);
private void setValue(String value) {
// save to equation string
System.out.println ("SpinnerEditor.setValue(): " + value + " at (" + row + ", " + MyTable.SPINNER_COLUMN + ")");
((JTable) parent).setValueAt(spinner.getValue(), this.row, this.column);
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
System.out.println ("SpinnerEditor.getTableCellEditorComponent(): row: " + row + "\tcolumn: " + column);
System.out.println ("SpinnerEditor.getTableCellEditorComponent(): value: " + value);
this.row = row;
this.column = column;
return spinner;
@Override
public boolean isCellEditable(EventObject evt) {
return true;
// Returns the spinners current value.
@Override
public Object getCellEditorValue() {
return spinner.getValue();
@Override
public boolean stopCellEditing() {
System.out.println("SpinnerEditor.stopCellEditing(): spinner: " + spinner.getValue() + " at (" + this.row + ", " + this.column + ")");
((JTable) parent).setValueAt(spinner.getValue(), this.row, this.column);
return true;
public void setValueRange(String smallOrLarge) {
System.out.println ("SpinnerEditor.setValueRange for " + smallOrLarge);
final int ARRAY_SIZE = 50;
if (MyTable.SMALL.equals(smallOrLarge)) {
final int MIN_SPIN_VALUE = 0;
final int MAX_SPIN_VALUE = 49;
//System.out.println ("SpinnerEditor.setValueRange(): [" + MIN_SPIN_VALUE + ".." + MAX_SPIN_VALUE + "]");
spinValues = new String[ARRAY_SIZE];
for (int i = MIN_SPIN_VALUE; i <= MAX_SPIN_VALUE; i++) {
spinValues[i] = new String(Integer.toString(i));
else { // large
final int MIN_SPIN_VALUE = 50;
final int MAX_SPIN_VALUE = 99;
//System.out.println ("SpinnerEditor.setValueRange(): [" + MIN_SPIN_VALUE + ".." + MAX_SPIN_VALUE + "]");
spinValues = new String[ARRAY_SIZE];
for (int i = 0; i <ARRAY_SIZE; i++) {
spinValues[i] = new String(Integer.toString(MIN_SPIN_VALUE + i));
//for (int i = 0; i <ARRAY_SIZE; i++) {
// System.out.println ("spinValues[" + i + "] = " + spinValues);
System.out.println ("SpinnerEditor.setValueRange(): [" + spinValues[0] + ".." + spinValues[ARRAY_SIZE-1] + "]");
// set model
spinner.setModel(new SpinnerListModel(java.util.Arrays.asList(spinValues)));However, it sets the range not only for the row in which the combo box was clicked, but all rows. Yes, because a single editor is used by the column.
One solution is to create two editors, then you override the getCellEditor(...) method to return the appropriated editor. Something like:
If (column == ?)
if (smallOrLarge)
return the small or large spinner editor
else
return the large spinner editor
else
return super.getCellEditor(...); -
How do I create a jtable with horizontalScroll bar,plz help me!
I created a jtable component,Because my table's columns has 50 items,I must need a horizontalScroll Bar.
but I find the horizontalScroll don't display,when I add record to the jtable,the verticalScroll Bar is showed.How do I create a jtable with horizontalScroll bar,can u help me!
thank you in advance!Hi,
This piece of code will help :
//Get the Component Adapter for taking action against resizing of
//of Panel
ComponentListenerAdapter componentAdapter =
new ComponentListenerAdapter()
//Get the scrollbar or remove the scrollbar upon resizing
protected void resizingAction()
Container tableParent = table.getParent();
if (tableParent instanceof JViewport)
//Check if the width of the Table Parent Container
//is less than the Preferred Size of the Table
if (tableParent.getSize().getWidth() <
table.getPreferredSize().getWidth())
//Yes it is
//Remove the Auton Resize Function and get the
//Scrollbar
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF );
else
//No it is not
//Get the Auto Resize functionality back in place
table.setAutoResizeMode(
JTable.AUTO_RESIZE_SUBSEQUENT_COLUMNS);
//Add the component Adapter to the Table Header
table.getTableHeader().addComponentListener(componentAdapter);
private abstract class ComponentListenerAdapter
implements ComponentListener
* The <code>componentHidden<code> method has no implementation
* @param event The Event occured whenever the Component is Hidden
public void componentHidden(ComponentEvent event)
//No Implementaion - Intentially Left Blank
* The <code>componentShown</code> method has no implementation
* @param event The Event occured whenever the Component is Shown
public void componentShown(ComponentEvent event)
//No Implementaion - Intentially Left Blank
* The <code>componentMoved</code> method has no implementation
* @param event The Event occured whenever the Component is Moved
public void componentMoved(ComponentEvent event)
//No Implementaion - Intentially Left Blank
* The <code>componentResized</code> method is invoked whenever the
* component is resized. The resizing action will set the columns and
* scrollbar to act properly
* @param event The Event occured whenever the Component is Resized
public void componentResized(ComponentEvent event)
resizingAction();
* Subclasses of this override this method to determine what is to be
* done once the Component has been Resized
protected abstract void resizingAction();
Hope this will solve all your JTable horizontal resizing problems
--j -
JTable with custom column model and table model not showing table header
Hello,
I am creating a JTable with a custom table model and a custom column model. However the table header is not being displayed (yes, it is in a JScrollPane). I've shrunk the problem down into a single compileable example:
Thanks for your help.
import javax.swing.*;
import javax.swing.table.*;
public class Test1 extends JFrame
public static void main(String args[])
JTable table;
TableColumnModel colModel=createTestColumnModel();
TestTableModel tableModel=new TestTableModel();
Test1 frame=new Test1();
table=new JTable(tableModel, colModel);
frame.getContentPane().add(new JScrollPane(table));
frame.setSize(200,200);
frame.setVisible(true);
private static DefaultTableColumnModel createTestColumnModel()
DefaultTableColumnModel columnModel=new DefaultTableColumnModel();
columnModel.addColumn(new TableColumn(0));
return columnModel;
static class TestTableModel extends AbstractTableModel
public int getColumnCount()
return 1;
public Class<?> getColumnClass(int columnIndex)
return String.class;
public String getColumnName(int column)
return "col";
public int getRowCount()
return 1;
public Object getValueAt(int row, int col)
return "test";
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
}Edited by: 802416 on 14-Oct-2010 04:29
addedKleopatra wrote:
jduprez wrote:
See http://download.oracle.com/javase/6/docs/api/javax/swing/table/TableColumn.html#setHeaderValue(java.lang.Object)
When the TableColumn is created, the default headerValue is null
So, the header ends up rendered as an empty label (probably of size 0 if the JTable computes its header size based on the renderer's preferred size).nitpicking (can't resist - the alternative is a cleanup round in some not so nice code I produced recently <g>):
- it's not the JTable's business to compute its headers size (and it doesn't, the header's the culprit.) *> - the header should never come up with a zero (or near-to) height: even if there is no title shown, it's still needed as grab to resize/move the columns. So I would consider this sizing behaviour a bug.*
- furthermore, the "really zero" height is a longstanding issue with MetalBorder.TableHeaderBorder (other LAFs size with the top/bottom of their default header cell border) which extends AbstractBorder incorrectly. That's easy to do because AbstractBorder itself is badly implemented
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6459419
Thanks for the opportunity to have some fun :-)
JeanetteNo problem, thanks for the insight :) -
Need help serializing an AbstractTableModel for a JTable with cell editing.
Fun times are ahead. Here we go!
I have a JTable that contains data I'd like to serialize out to a file to be restored and viewed later.
So I tried saving the AbstractTableModel subclass out to a file. Whenever I do this, I get the following error message:
java.io.NotSerializableException: javax.swing.JTable$CellEditorRemover
Now I know for fact that serializing an AbstractTableModel that was installed in a JTable without cell editing works just fine (my old code did exactly that). As a result, I think that the code that handles events in the AbstractTableModel contains references back out to the JTable, which causes the JTable to be saved no matter what (even though I'm just interested in saving the TableModel only). It causes a bigger file than normal, but file size is not an issue. The only issue I have is that CellEditorRemover (an undocumented inner class of JTable), which is automatically installed for JTables with editable cells, is not serializable.
This leads to the following questions:
1. Is there a way to avoid serialization/deserialization of the CellEditorRemover inner class of JTable?
2. Is there a way to save an AbstractTableModel without saving all of the event listeners associated with it?
I think an answer to either of these questions would go a long way towards solving my problem. Otherwise, I'll resign myself to weeping silently in the corner of my office.
Thanks!I would suggest that if you can you only save the
data... but i would do this by using the
externalizable interface.
What you will need to do is have the
writeExternal(ObjectOutputStream out) and
readExternal(ObjectOutputStream out) methods in your
class. These will be responsiable for saving the
data.
Here's an example of what you can do in these
methods... this is just a little tidbit from a program
i've written.public void writeExternal(ObjectOutput out) throws
IOException {
out.writeInt(size);
out.writeObject(drawName);
out.writeInt(playersLength);
for(int i = 0; i < playersLength; i++)
) out.writeObject(players);
out.writeInt(seedsLength);
for(int i = 0; i < seedsLength; i++)
) out.writeObject(seeds[i]);
out.writeInt(drawLength);
for(int i = 0; i < drawLength; i++)
) out.writeObject(draw[i]);
public void readExternal(ObjectInput in) throws
IOException, ClassNotFoundException {
size = in.readInt();
drawName = (String)in.readObject();
playersLength = in.readInt();
for(int i = 0; i < playersLength; i++) players[i] =
= (String)in.readObject();
seedsLength = in.readInt();
for(int i = 0; i < seedsLength; i++) seeds[i] =
= (String)in.readObject();
drawLength = in.readInt();
for(int i = 0; i < drawLength; i++) draw[i] =
= (String)in.readObject();
You can now use your class as you would a Serializable
class, but it will only save the data
Hope this helped
webaf409java
I forgot to add some critical information in my original post. My apologies. :(
I've thought about using Externalizable, but am hesitant to use it because the application would no longer be able to read in files using the old save format (ie, AbstractTableModels for JTables without CellEditorRemovers ). I want to preserve the ability to read the old saved AbstractTableModel formats if possible.
Do you know of a way to revert to the default deserialization mechanism from readExternal? This way, during deserialization, I could do a quick test on the object being read and have the ability to default to the regular deserialization mechanism if the object is of the old type or continue with the new Externalizable stuff if the object is one of the new type. Maintaining file compatibility is key. -
Can we create JTable with multiple rows with varying number of columns ?
Hi All,
I came across a very typical problem related to JTable. My requirement is that cells should be added dynamically to the JTable. I create a JTable with initial size of 1,7 (row, columns) size. Once the 7 columns are filled with data, a new row should be created. But the requirement is, the new row i.e. second row should have only one cell in it initially. The number of cells should increase dynamically as the data is entered. The table is automatically taking the size of its previous row when new row is added. I tried by using setColumnCount() to change the number of columns to '1' for the second row but the same is getting applied to the first row also.
So can you please help me out in this regard ? Is it possible to create a JTable of uneven size i.e. multiple rows with varying number of columns in each row ?
Thanks in Advance.Well a JTable is always going to paint the same number of columns for each row. Anything is possible if you want to rewrite the JTable UI to do this, but I wouldn't recommend it. (I certainly don't know how to do it).
A simpler solution might be to override the isCellEditable(...) method of JTable and prevent editing of column 2 until data in column 1 has been entered etc., etc. You may also want to provide a custom renderer that renderers the empty column differently, maybe with a grey color instead of a white color. -
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,
TamizhanI 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 with ImageIcons does not react to even handling
Hi.
I have a populated JTable with ONLY ImageIcons in it. I need to generate event responses on mouseClicks. However, any event listener I associate with this, nothing seems to be happening.
(Somehow, I'm guess the ImageIcons - which are rendered on a JLabel, are/is the source of all troubles!!)
The code is below :
import java.io.File;
import java.awt.Point;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.ImageIcon;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
* Entry point for the Images Table.
* @author Raj Gaurav
public class SpecialCharacterDialog extends JDialog{
String collectionString[] = null;
ImageIcon suite[] = null;
public SpecialCharacterDialog() {
Container contentPane = getContentPane();
// Create the Table Model and create the Table from the model
MyTableModel model = new MyTableModel();
JTable table = new JTable(model);
table.setDefaultRenderer(ImageIcon.class, new CustomCellRenderer());
table.setCellSelectionEnabled(true);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ListSelectionModel rowSM = table.getSelectionModel();
rowSM.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
//Ignore extra messages.
if (e.getValueIsAdjusting()) return;
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
if (lsm.isSelectionEmpty()) {
System.out.println("No rows are selected.");
} else {
int selectedRow = lsm.getMinSelectionIndex();
System.out.println("Row " + selectedRow
+ " is now selected.");
// Add the table to the contentPane
JScrollPane pane = new JScrollPane(table);
contentPane.add(pane);
* This class contains all the DATA information, the ImageIcons
* needed for display.
class SymbolCollection {
final static int NUMBER_OF_COLUMNS = 15;
private String collectionString[] = null;
private ImageIcon suite[] = null;
* Constructor : Initialises all the ImageIcon and their Names.
public SymbolCollection() {
File f = new File("C:\\Test\\Images");
collectionString = f.list();
int numberOfImages = collectionString.length;
suite = new ImageIcon[numberOfImages];
for(int i = 0;i < numberOfImages; i++) {
suite[i] = new ImageIcon("C:\\Test\\images" + File.separator + collectionString);
* Returns the total number of images in "images" folder.
public int getTotalNumberOfImages() {
return suite.length;
* Returns the target ImageIcon.
public ImageIcon getImageIconAt(int number) {
return suite[number];
* Returns the target ImageIcon Name.
public String getImageIconNameAt(int number) {
return collectionString[number];
* Returns an array of ALL the ImageIcons available.
public ImageIcon[] getImageIcons() {
return suite;
* Returns an array of ALL the ImageIcon names available
public String[] getImageIconNames() {
return collectionString;
* Returns TRUE for all cells
public boolean isEditable(int row, int col) {
return true;
* Defines the table model for the tabel.
class MyTableModel extends AbstractTableModel {
private SymbolCollection collection = null;
private Object data[][] = null;
* Constructor for the TableModel. Initialises the "data" field for table.
public MyTableModel() {
int countOfImages = 0;
collection = new SymbolCollection();
data = new Object[getRowCount()][SymbolCollection.NUMBER_OF_COLUMNS];
for(int i = 0; i < getRowCount(); i++) {
for(int j = 0; j < SymbolCollection.NUMBER_OF_COLUMNS; j++) {
if(countOfImages == collection.getTotalNumberOfImages()) {
break;
data[i][j] = collection.getImageIconAt(countOfImages);
countOfImages++;
* Returns the number of rows for this table.
* It is calculated as : TotalNumber/NumberOfColumns if remainder is ZERO or,
* TotalNumber/NumberOfColumns + 1 if not.
public int getRowCount() {
int numberOfRows = collection.getTotalNumberOfImages()/SymbolCollection.NUMBER_OF_COLUMNS;
if(numberOfRows == 0) {
return numberOfRows;
else {
return numberOfRows + 1;
* Returns the number of Columns for this table
public int getColumnCount() {
return SymbolCollection.NUMBER_OF_COLUMNS;
* Returns the CLASS data type for this table
public Class getColumnClass(int col) {
return collection.getImageIconAt(0).getClass();
* Returns the table data at (row, col).
public Object getValueAt(int row, int col) {
return data[row][col];
* Renders the table to display images in individual cells
class CustomCellRenderer extends JLabel implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
setIcon((ImageIcon)value);
return this;Hi.
I have a populated JTable with ONLY ImageIcons in it. I need to generate event responses on mouseClicks. However, any event listener I associate with this, nothing seems to be happening.
(Somehow, I'm guess the ImageIcons - which are rendered on a JLabel, are/is the source of all troubles!!)
The code is below :
import java.io.File;
import java.awt.Point;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.ImageIcon;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
* Entry point for the Images Table.
* @author Raj Gaurav
public class SpecialCharacterDialog extends JDialog{
String collectionString[] = null;
ImageIcon suite[] = null;
public SpecialCharacterDialog() {
Container contentPane = getContentPane();
// Create the Table Model and create the Table from the model
MyTableModel model = new MyTableModel();
JTable table = new JTable(model);
table.setDefaultRenderer(ImageIcon.class, new CustomCellRenderer());
table.setCellSelectionEnabled(true);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ListSelectionModel rowSM = table.getSelectionModel();
rowSM.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
//Ignore extra messages.
if (e.getValueIsAdjusting()) return;
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
if (lsm.isSelectionEmpty()) {
System.out.println("No rows are selected.");
} else {
int selectedRow = lsm.getMinSelectionIndex();
System.out.println("Row " + selectedRow
+ " is now selected.");
// Add the table to the contentPane
JScrollPane pane = new JScrollPane(table);
contentPane.add(pane);
* This class contains all the DATA information, the ImageIcons
* needed for display.
class SymbolCollection {
final static int NUMBER_OF_COLUMNS = 15;
private String collectionString[] = null;
private ImageIcon suite[] = null;
* Constructor : Initialises all the ImageIcon and their Names.
public SymbolCollection() {
File f = new File("C:\\Test\\Images");
collectionString = f.list();
int numberOfImages = collectionString.length;
suite = new ImageIcon[numberOfImages];
for(int i = 0;i < numberOfImages; i++) {
suite[i] = new ImageIcon("C:\\Test\\images" + File.separator + collectionString);
* Returns the total number of images in "images" folder.
public int getTotalNumberOfImages() {
return suite.length;
* Returns the target ImageIcon.
public ImageIcon getImageIconAt(int number) {
return suite[number];
* Returns the target ImageIcon Name.
public String getImageIconNameAt(int number) {
return collectionString[number];
* Returns an array of ALL the ImageIcons available.
public ImageIcon[] getImageIcons() {
return suite;
* Returns an array of ALL the ImageIcon names available
public String[] getImageIconNames() {
return collectionString;
* Returns TRUE for all cells
public boolean isEditable(int row, int col) {
return true;
* Defines the table model for the tabel.
class MyTableModel extends AbstractTableModel {
private SymbolCollection collection = null;
private Object data[][] = null;
* Constructor for the TableModel. Initialises the "data" field for table.
public MyTableModel() {
int countOfImages = 0;
collection = new SymbolCollection();
data = new Object[getRowCount()][SymbolCollection.NUMBER_OF_COLUMNS];
for(int i = 0; i < getRowCount(); i++) {
for(int j = 0; j < SymbolCollection.NUMBER_OF_COLUMNS; j++) {
if(countOfImages == collection.getTotalNumberOfImages()) {
break;
data[i][j] = collection.getImageIconAt(countOfImages);
countOfImages++;
* Returns the number of rows for this table.
* It is calculated as : TotalNumber/NumberOfColumns if remainder is ZERO or,
* TotalNumber/NumberOfColumns + 1 if not.
public int getRowCount() {
int numberOfRows = collection.getTotalNumberOfImages()/SymbolCollection.NUMBER_OF_COLUMNS;
if(numberOfRows == 0) {
return numberOfRows;
else {
return numberOfRows + 1;
* Returns the number of Columns for this table
public int getColumnCount() {
return SymbolCollection.NUMBER_OF_COLUMNS;
* Returns the CLASS data type for this table
public Class getColumnClass(int col) {
return collection.getImageIconAt(0).getClass();
* Returns the table data at (row, col).
public Object getValueAt(int row, int col) {
return data[row][col];
* Renders the table to display images in individual cells
class CustomCellRenderer extends JLabel implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
setIcon((ImageIcon)value);
return this; -
Print JTable with multi line header
I need to print a JTable with multi line header, I want to know if I can use the method jTable.print(int, MessajeFormat, MessageFormat) by manipulation of the MessageFormat. How I can manipulate it?
Otherwise, How I can print this?hi again,
To print pdf in a swing application you don't need servlet.jar.
You'll only need itext.jar and a printer connected to your pc.
Download the iText source code and unzip it. See the following classes:
com.lowagie.tools.LPR and com.lowagie.tools.BuildTutorial. This latter is the main class of a swing tool that you can run.
Silent Print:
You have only to embed this javascript code in your pdf:
writer.addJavaScript("this.print(false);", false);
document.add(new Chunk("Silent Auto Print"));Then, you have to send the document to the printer.
Google : java print pdf
http://forum.java.sun.com/thread.jspa?threadID=523898 or
http://www.exampledepot.com/egs/javax.print/pkg.html for printing task.
Under unix system, I used this:
String PRINTER = ...;
try {
String cmd = "lp -d " + PRINTER + " " + PDF_PATH;
Runtime.getRuntime().exec(new String[] { "sh", "-c", cmd });
} catch (Exception e) {
//handle the exception
e.printStackTrace();
}hth
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