Placing JButtons in JTable cells
I would like to place JButtons in one column of a JTable.
Can anyone post or point me toward some example code that illustrates this?
Many thanks in advance.
did you try this with the cell renderer
This should work. Try extending the DefaultCellRenderer and set them as a jbutton
hope this will work
Similar Messages
-
Adding JButton into JTable cells
Hi there!!
I want to add a JButton into JTable cells.In fact I have got two classes.Class2 has been extended from the AbstractTableModel class and Class1 which is using Class2's model,,,here's the code,,
Class1
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class Class1 extends javax.swing.JFrame {
//////GUI specifications
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TestTableButton().setVisible(true);
Class2 model=new Class2();
jTable1=new JTable(model);
jScrollPane1.setViewportView(jTable1);
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
// End of variables declaration
private javax.swing.JTable jTable1;
}Class2
import javax.swing.table.*;
public class Class2 extends AbstractTableModel{
private String[] columnNames = {"A","B","C"};
private Object[][] data = {
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
return false;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}what modifications shud I be making to the Class2 calss to add buttons to it?
Can anybody help plz,,,,,??
Thanks in advance..Hi rebol!
I did search out a lot for this but I found my problem was a bit different,,in fact I want to use another class's model into a class being extended by JFrame,,so was a bit confused,,,hope you can give me some ideas about how to handle that scenario,,I know this topic has been discussed before here many a times and also have visited this link,,
http://forum.java.sun.com/thread.jspa?threadID=465286&messageID=2147913
but am not able to map it to my need,,,hope you can help me a bit...
Thanks ..... -
Multiple JButtons inside JTable cell - Dispatch mouse clicks
Hi.
I know this subject has already some discussions on the forum, but I can't seem to find anything that solves my problem.
In my application, every JTable cell is a JPanel, that using a GridLayout, places vertically several JPanel's witch using an Overlay layout contains a JLabel and a JButton.
As you can see, its a fairly complex cell...
Unfortunately, because I use several JButtons in several locations inside a JTable cell, sometimes I can't get the mouse clicks to make through.
This is my Table custom renderer:
public class TimeTableRenderer implements TableCellRenderer {
Border unselectedBorder = null;
Border selectedBorder = null;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
if (value instanceof BlocoGrid) {
if (isSelected) {
if (selectedBorder == null)
selectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getSelectionBackground());
((BlocoGrid) value).setBorder(selectedBorder);
} else {
if (unselectedBorder == null)
unselectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getBackground());
((BlocoGrid) value).setBorder(unselectedBorder);
return (Component) value;
}and this is my custom editor (so clicks can get passed on):
public class TimeTableEditor extends AbstractCellEditor implements TableCellEditor {
private TimeTableRenderer render = null;
public TimeTableEditor() {
render = new TimeTableRenderer();
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
if (value instanceof BlocoGrid) {
if (((BlocoGrid) value).barras.size() > 0) {
return render.getTableCellRendererComponent(table, value, isSelected, true, row, column);
return null;
public Object getCellEditorValue() {
return null;
}As you can see, both the renderer and editor return the same component that cames from the JTable model (all table values (components) only get instantiated once, so the same component is passed on to the renderer and editor).
Is this the most correct way to get clicks to the cell component?
Please check the screenshot below to see how the JButtons get placed inside the cell:
http://img141.imageshack.us/my.php?image=calendarxo9.jpg
If you need more info, please say so.
Thanks.My mistake... It worked fine. The cell span code was malfunctioning. Thanks anyway.
-
When a JCombobox is displayed in your basic panel, the text field and drop down arrow can been seen, by default.
But when a JComboBox is placed inside a JTable cell, the drop-down arrow disappears until the cell has been clicked in.
Is there a way to override the default display behavior in a JTable cell, and have the combobox drop-down arrow appear next to the text field by default? Is there something that can be done in the TableCellRenderr?
-Philyou could always try over-riding the paint method of the tablecellrenderer to draw your triangle or arrow..... never tried it, but theoretically possible
-
JButton in table cell in Find Mode
Hello!
I have JButton in JTable cell for calling LOV.
When form goes to Find Mode all JButtons become disabled.
Accordingly, I want that buttons active. Any help will be appreciated %)If the button is bound with an LOV Button binding, then I believe the framework checks the queryable property of the "target" attribute. Make sure that attribute has the "queryable" property checked in the View/Entity.
Hope this helps.
Erik -
What component is placed default in each cell of JTable?
Hi,
What component is placed default in each cell of JTable?It depends on the content, see How to Use Tables - Concepts: Editors and Renderers for details.
-
JButton "sticking" in a JTable Cell
So I've modified the renderer and what not and slapped a button into a JTable Cell. The assignment requires it to turn red/green altrenativly when pressed. It works perfectly aside from the fact that the buttons appear to not "bounce back" when they switch colors. (i.e. They appear depressed when red and pressed when green). The code is below. any ideas?
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.JButton;
public class ButtonTableModel extends AbstractTableModel {
private static final long serialVersionUID = 1;
private Object[][] rows = new Object[2][1];
private String[] columns = new String[1];
public ButtonTableModel() {
for(int k = 0; k < rows.length; k++) {
JButton button3 = new JButton("222");
button3.setSize(200, 200);
button3.setBackground(Color.red);
button3.addMouseListener(new ColorChanger(button3));
rows[k][0] = button3;
/*button = new JButton("Test Button");
button.setBackground(Color.red);
button.addMouseListener(new ColorChanger(button));
button2 = new JButton("asdf");
button2.setBackground(Color.red);
button2.addMouseListener(new ColorChanger(button2));
rows[0][0] = button;
rows[1][0] = button2;*/
private class ColorChanger implements MouseListener {
private JButton callingButton; //Stores the button that added the Listener
public ColorChanger(JButton pCallingButton) { //Constructs a ColorChanger that stores a given JButton
callingButton = pCallingButton;
public void mouseClicked(MouseEvent e) { //When callingButton is clicked, its color changes alternativly to green/red
if(isGreen(callingButton) == false)
callingButton.setBackground(Color.green);
else
callingButton.setBackground(Color.red);
//The 4 methods below are unused leftovers specified by the MouseListener Interface
public void mouseEntered(MouseEvent arg0) {
public void mouseExited(MouseEvent arg0) {
public void mousePressed(MouseEvent arg0) {
public void mouseReleased(MouseEvent arg0) {
private boolean isGreen(JButton pButton) { //Returns true if a button's background is green, false otherwise
if(pButton.getBackground() == Color.green)
return true;
return false;
public int getColumnCount() { //Returns the number of Columns in a table
return columns.length;
public int getRowCount() { //Returns the number of rows in the table
return rows.length;
public String getColumnName(int pCollumnIndex) { //Returns the name of the collumn
return columns[pCollumnIndex];
public Object getValueAt(int pRow, int pColumn) { //Returns the value at given table coordinates
return rows[pRow][pColumn];
public boolean isCellEditable(int pRow, int pColumn) { //Returns true if a cell at given coordinates is editable, false otherwise
return false;
public Class getColumnClass(int pColumnIndex) { //Retrieves the class of the objects in a column
return getValueAt(0, pColumnIndex).getClass();
import java.awt.Color;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JTable;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.table.TableCellRenderer;
public class JButtonJTableTest extends JFrame {
private static final long serialVersionUID = 1;
private JTable table;
private TableCellRenderer tableCellRenderer;
private MouseEvent e2;
private Class columnClass;
private JButton button;
private Point mousePos;
private int mouseRow, mouseColumn;
public JButtonJTableTest() {
super("JButton Table Test");
table = new JTable(); //Setup the table, assigning the new renderer and model
tableCellRenderer = table.getDefaultRenderer(JButton.class);
table.setDefaultRenderer(JButton.class, new JButtonRenderer(tableCellRenderer));
table.setModel(new ButtonTableModel());
table.setGridColor(Color.blue);
table.addMouseListener(new MouseForwarder());
table.setShowGrid(true);
add(table); //Add the table to the content pane
private class MouseForwarder implements MouseListener {
public void mouseClicked(MouseEvent e) {
mousePos = new Point(e.getX(), e.getY()); //Assing mouse coordinates to a point data structure
mouseRow = table.rowAtPoint(mousePos); //Ascertain the mouse's row & column
mouseColumn = table.columnAtPoint(mousePos);
if(mouseRow == -1 || mouseColumn == -1) //Ensure that the column is within the table
return;
columnClass = table.getColumnClass(mouseColumn); //Ascertain the column's class
if(columnClass != JButton.class) //If the class is not JButton, exit MouseForwarder
return;
button = (JButton)table.getValueAt(mouseRow, mouseColumn); //Access the button where the mouse clicked
e2 = (MouseEvent)SwingUtilities.convertMouseEvent(table, e, button); //Forward click to button
button.dispatchEvent(e2); //Have button take action
table.repaint(); //Repaint the table to ensure proper button animation
//The 4 methods below are unused methods from the MouseListener Interface
public void mouseEntered(MouseEvent arg0) {
public void mouseExited(MouseEvent arg0) {
public void mousePressed(MouseEvent arg0) {
public void mouseReleased(MouseEvent arg0) {
public static void main(String[] args) { //Setup and run the window
JButtonJTableTest test = new JButtonJTableTest();
test.setSize(300, 300);
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test.setVisible(true);
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
public class JButtonRenderer implements TableCellRenderer {
private TableCellRenderer defaultRenderer;
private Component jTableButton;
public JButtonRenderer(TableCellRenderer pRenderer) {
defaultRenderer = pRenderer;
public Component getTableCellRendererComponent(JTable pTable, Object pButton, boolean isSelected,
boolean hasFocus, int pRow, int pCollumn) {
try {
jTableButton = (Component)pButton;
return (Component)pButton;
catch(ClassCastException exception) {
return defaultRenderer.getTableCellRendererComponent(pTable, pButton, isSelected,
hasFocus, pRow, pCollumn);
}This question was crossposted into the Swing forum and should be answered there as that is the correct location for it http://forum.java.sun.com/thread.jspa?threadID=753812
-
Problem in event handling of combo box in JTable cell
Hi,
I have a combo box as an editor for a column cells in JTable. I have a event listener for this combo box. When ever I click on the JTable cell whose editor is combo box,
I get the following exception,
Exception occurred during event dispatching:
java.lang.NullPointerException
at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.setDispatchComponent(Unknown Source)
at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(Unknown Source)
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Can any one tell me how to over come this problem.
Thanks,
RaghuHere's an example of the model I used in my JTable. I've placed 2 comboBoxes with no problems.
Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
public boolean isCellEditable(int rowIndex, int columnIndex)
// The 2nd & 3rd column or Value field is editable
if(isEditable)
if(columnIndex > 0)
return true;
return false;
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
* Retrieves number of columns
public synchronized int getColumnCount()
return NUM_COLUMNS;
* Get a column name
public String getColumnName(int col)
return columnNames[col];
* Retrieves number of records
public synchronized int getRowCount()
if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
* Clears all records
public synchronized void clear()
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.removeAllElements();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS)
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
* Loads the values into the combo box within the table for mail id
public void setUpMailColumn(JTable mapTable, ArrayList mailList)
TableColumn col = mapTable.getColumnModel().getColumn(1);
javax.swing.JComboBox comboMail = new javax.swing.JComboBox();
int s = mailList.size();
for(int i=0; i<s; i++)
comboMail.addItem(mailList.get(i));
col.setCellEditor(new DefaultCellEditor(comboMail));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for mail Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Mail Id to see a list of choices");
* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
for(int i=0; i<s; i++)
combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
} -
Update jtable cell via numeric keypad
Hi,
I have a problem, trying to figure out how to input numbers in a jtextfield in a jtable cell, from a group of jbuttons (rendered as a numeric keypad). I can get the cell to focus, but when I click on one of the jbuttons in the keypad, the cell loses focus and nothing is printed. I can update the cell by directly typing from the keyboard; that works fine. But I'm lost when trying to do it from the touch-screen keypad. Can anyone point me in the right direction. I assume I need to attach additional listeners somewhere.
Thanks in-advance.
LeeI can get the cell to focus, Then the code for you button would need to be something like:
String text = (String)table.getValueAt(...);
String updated = text + button.getText();
table.setValueAt(updated, ...); -
Is there any known efficient methods of creating the JTextField or JTable-cell Button as like in Forte's Component Inspector window where you click on the property value field and the value is displayed just left of a small button labelled "..." ie: [some text field with value][...] also referred to as the "ellipsis" buttons, or will most answers to this question simply describe the layout of a JField-JButton combination? The action from clicking on the [...] button aligned right of the JTextField simply invokes or displays a larger input interface in which upon completion of the entered data, returns the input to the related JTextField.
Thanks to anybody for any help with this, and perhaps in return, I may be able to answer any non-gui java questions, or some not so unfamilliar GUI questions.Hello StanislavL and Lutianxiong,
I remember asking this question some time ago, and the time has come again for me to seek this functionality. I have finally achieved the functionality and thought I would post the answer for anybody else. I had not realized that I had recieved a solution/reply to my original question as I come here to post the answer, and in fact, my solution does appear to be very similiar to your reply, StanislavL. As for you, Lutianxiong and other seekers of this info, here is my solution with a JFileChooser style input for the 3rd column which only shows gif,jpg and png files:
<code>
------------- TableCellFileInput.java -------------------
public class TableCellFileInput extends javax.swing.JPanel {
private String extensions[];
public TableCellFileInput(String fileExtensions[]) {
extensions = fileExtensions;
self = this;
initComponents();
private void initComponents() {
valueField = new javax.swing.JTextField();
fileButton = new javax.swing.JButton();
setLayout(new java.awt.BorderLayout());
valueField.setText("jTextField1");
add(valueField, java.awt.BorderLayout.CENTER);
fileButton.setText("...");
fileButton.setMargin(new java.awt.Insets(0, 2, 0, 2));
fileButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
fileButtonActionPerformed(evt);
add(fileButton, java.awt.BorderLayout.EAST);
private void fileButtonActionPerformed(java.awt.event.ActionEvent evt) {
String filePath = valueField.getText();
if(filePath != null && filePath.length() > 0) {
filePath = new java.io.File(filePath).getParent();
javax.swing.JFileChooser chooser
= new javax.swing.JFileChooser(filePath);
chooser.setFileFilter(new ImageFilter());
int returnVal = chooser.showOpenDialog(this);
if(returnVal == javax.swing.JFileChooser.APPROVE_OPTION) {
valueField.setText(chooser.getSelectedFile().getAbsolutePath());
class ImageFilter extends javax.swing.filechooser.FileFilter {
public boolean accept(java.io.File f) {
if(f.isDirectory()) return true;
String fName = f.getName();
if(extensions != null) {
for(int i=0;i<extensions.length;i++) {
if(fName.endsWith(extensions[ i ])) return true;
return false;
public String getDescription() {
return DESCRIPTION;
class CustomCellEditor extends javax.swing.AbstractCellEditor
implements javax.swing.table.TableCellEditor {
public Object getCellEditorValue() {
return valueField.getText();
public java.awt.Component getTableCellEditorComponent(javax.swing.JTable table, Object value, boolean isSelected, int row, int column) {
System.out.println("fileEditor");
if(value == null) valueField.setText("");
else valueField.setText(value.toString());
return self;
public void setColumn(javax.swing.table.TableColumn column) {
column.setCellEditor(new CustomCellEditor());
private javax.swing.JButton fileButton;
private javax.swing.JTextField valueField;
private static final String DESCRIPTION = "Image File Filter";
private java.awt.Component self;
------------- TestTable .java -------------------
public class TestTable extends javax.swing.JFrame {
public TestTable() {
editorField = new javax.swing.JTextField();
String fileExts[] = {"gif","jpg","png"};
fileEditorField = new TableCellFileInput(fileExts);
initComponents();
javax.swing.table.TableColumn column
= jTable1.getColumn("Title 3");
fileEditorField.setColumn(column);
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, "cats"},
{null, null, null, "dogs"},
{null, null, null, "mice"},
{null, null, null, "birds"}
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
Class[] types = new Class [] {
java.lang.Object.class, java.lang.Object.class, java.lang.Object.class, java.lang.String.class
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
jScrollPane1.setViewportView(jTable1);
getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-400)/2, (screenSize.height-300)/2, 400, 300);
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
public static void main(String args[]) {
new TestTable().show();
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
private javax.swing.JTextField editorField;
private TableCellFileInput fileEditorField;
</code> -
Hello -
I'm rather new to Java, so please excuse me if this is a simple question. For a project I am working on, I am attempting to deal with placing two icons in a single JTable cell. For the life of me I have no idea if this is even feasible, let alone how I would implement it. Originally I thought about attempting to overload the JLabel class (as this is what the JTable cell is based upon, if I'm not mistaken?) and allowing two icons to be placed per label.
Am I on the right track? Is this even possible? Any suggestions?
Thanks much.Please read the forum for JTable.
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
You will know that you canuse any component as CellRenderer, this component can have whatever you want (say 2 icons and 5 comboboxes)
here is short example that shows 2 icons in JTable
import java.awt.*;
import java.awt.image.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class TwoIcons extends JFrame {
public static void main(String[] args){
createIcons();
SwingUtilities.invokeLater
new Runnable()
public void run() {
new TwoIcons();
public TwoIcons(){
super("Test");
DefaultTableModel tm = new DefaultTableModel(
new Object[][]{
{new IconPair("cross", "cross"), "just a string"},
{new IconPair("circle", "cross"),"just another string"},
{new IconPair("String", "circle"),"yet another string"}
}, new String[]{"Two Icons","String"}){
public Class getColumnClass(int columnIndex){
if(columnIndex==0){
return IconPair.class;
else
return super.getColumnClass(columnIndex);
JTable table = new JTable(tm);
final Color bg = table.getBackground();
table.setDefaultRenderer(IconPair.class, new TableCellRenderer(){
RendererPanel renderer = new RendererPanel(bg);
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setIcons((IconPair)value);
return renderer;
JScrollPane scp = new JScrollPane(table);
add(scp);
setSize(400,100);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
class RendererPanel extends JPanel{
JLabel tf1,tf2;
RendererPanel(Color bg){
setLayout(new BoxLayout(this,BoxLayout.LINE_AXIS) );
tf1=new JLabel();
tf2=new JLabel();
add(tf1);
add(Box.createRigidArea(new Dimension(5,0)));
add(tf2);
setBackground(bg);
public void setIcons(IconPair value) {
tf1.setIcon(value.i1);
tf2.setIcon(value.i2);
//uncomment next 2 lines if you want text as well
// tf1.setText(value.s1);
// tf2.setText(value.s2);
class IconPair {
public Icon i1,i2;
public String s1,s2;
IconPair(String s1, String s2){
this.i1=icons.get(s1);
this.i2=icons.get(s2);
this.s1=s1;
this.s2=s2;
static Map<String,Icon> icons = new HashMap<String,Icon>();
public static void createIcons(){
Image img = new BufferedImage(10,10, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2=(Graphics2D)(img.getGraphics());
g2.setColor(Color.RED);
g2.drawLine(0,0,10,10);
g2.drawLine(0,10,10,0);
icons.put("cross",new ImageIcon(img));
img = new BufferedImage(10,10, BufferedImage.TYPE_INT_ARGB);
g2=(Graphics2D)(img.getGraphics());
g2.setColor(Color.GREEN);
g2.drawOval(1,1,8,8);
icons.put("circle",new ImageIcon(img));
} -
Multiple selection in a JTable cell
Dear friends,
I have to provide a way to user select multiple names in a unique cell of a JTable....
i.e., the user click on te cell, and some pane or list appears on the screen.. te user then select some field and then close the pane.
next time te user click on the same cell, the list comes with the updated fields...
how to ?
JList? JComboBox ? JOptionPane ?If you use a JButton as the cell editor, you could invoke a JList from button's event listener.
-
Edit a JTable cell, click save button, value isn't stored in JTable
I'm editing a JTable cell, just using default editor provided by JTable
I click a save button elsewhere in my GUI
The value typed into the cell so far isn't stored in the TableModel yet and so doesn't get saved.
How can I make sure the value gets stored in the JTable in the above scenario when the JButton is pressed but before saving.
Preferably I'd like the code with the JButton not to have to know about the JTable at all.
Cheers,
DI the forums 100s of times.Many thanks. If they had a decent search on this forum I might have found it as I did try.
Come to think of it - Sun have completely fcukd up this forum. -
Hello all !
I want to create a JTable with Cell (class that I will write which extends JButton) in each cell of the table. Cell should contain a state, say 0,1,2 or 3, which dictates the representation of the cell. A representation of a cell contains a background color and an Icon. In addition, I want that if I press the left button of the mouse, the cell will change his state to 1, then to 2 and back to 1, and the right button of the mouse will change the state to 3, then to 4, and back to 3.
I have tried many ideas based on different examples I found on the Internet, but didn't get what I wanted, and now I'm really confused...
Can anyone help ?
I will be grateful for any help !
Thanks in advance !First of all thanks for your wish to help !
First of all you have no need to extend JTable. You
just use a DefaultTableModel and add data to the
model.I tried to use DefaultTableModel, but now I don't see the table at all :)
Can you explain why ? The code is following:
public class JCFrame {
private static void createAndShowGUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JCTable table = new JCTable();
frame.add(table);
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(
new Runnable() { public void run() { createAndShowGUI(); } });
public class JCTable extends JTable {
public JCTable() {
super(new JCTableModel());
public class JCCell extends JButton {
private int state;
public JCCell(int initialState) {
state = initialState;
public class JCTableModel extends DefaultTableModel {
private final int numberOfRows = 2;
private final int numberOfColumns = 3;
private Object[][] cellsData = new JCCell[numberOfRows][numberOfColumns];
public JCTableModel() {
for (int i = 0; i < numberOfRows; i++)
for (int j = 0; j < numberOfColumns; j++)
cellsData[i][j] = new JCCell(numberOfRows * i + j);
}In addition, I don't understand why I don't need to extend JTable. If I want to see a table, I should use JTable somewhere, but where ??
If you don't want to see the column headers then you
can use table.setHeader( null );I tried to write this, but the compiler complains that he cannot find symbol method setHeader(...). I neither found this method in Java API. Are you sure about it ?
And one more question:
Should the renderer extend JButton ?
Many thanks !! -
JPanel as a JTable Cell Editor
I want to use a JPanel and as a JTable Cell Editor. The JPanel consists of a JTextField and a JButton. When I bring it up as an editor all works fine until I change the text field value and click on another line causing the editor to be stopped. Then my app seems to go into a processing frenzy which effectively stop me from doing anything else (the app has trouble repainting itself as well).
I'm assuming I'm not passing an important message from the JPanel to the text field but am not sure. Has anyone had success in doing this? What am I missing?
Thanks in advance,
PhillipLooks like I was too quick off the draw in posting this.
My problem was due to some old "expiremental" code that was processing key binding.
Once I removed the unnecessary code all worked well.
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