JTable cell + isSelected, hasFocus, highlighted ??

hi
My JTable has row and column selection disabled, when a cell is clicked, only the outline is highlighted
It seems that when i click a cell in my JTable that said cell is given focus (has its edge highlighted), and when this cell is clicked the second time it is 'selected'. However there is nothing to indicate to the user that the cell is selected, ie its state is still a single line highlighted border. A double click puts the cell in edit mode.
My questions are so:
What state is a cell in when it is internally highlighted with color ?
Why make the distinction (between focus and selection) if its only possible to get selectedRow() and not getRowWithFocus() ?
How can i have it so that a sinlge click makes a cell both selected and with focus, i know its down to changing the cell renderer, i tried 'if (hasFocus) { isSelected = true; } but that wasn't working.
Why does clearSelection not clear the cells which are internally highlighted with color ? And how can i clear those cells ?
Hope someone can help
Thanks

However there is nothing to indicate to the user that the cell is selected, ie its state is still a single line highlighted border.
Why make the distinction (between focus and selection) if its only possible to get selectedRow() and not getRowWithFocus() ?Normally a table operates in row selection mode and all cells in the selected row are highlighted except the cell that has focus, which uses the single line highlighted border.
So, in a table that uses single cell selection there are no other selected cells so you only see the focused cell with the highlighted border. If you want to highlight the focused cell you could try overriding the following method of JTable:
public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
     Component c = super.prepareRenderer(renderer, row, column);
     if (isCellSelected(row, column))
          c.setBackground( getSelectionBackground());
     return c;
}

Similar Messages

How to automatically highlight / bold words in a JTable cell?

how do i do it?
i have an Object called Data (where toString() is the same as getDataName()).
and i want the JTable to either highlight or bold specific words (using the bold HTML tags) that are present in a SortedSet.
i do not want the dataName to be changed by directly manipulating the Object because the Data Objects were taken from the DB and i need the Objects and the records to be synchronised, and because the words in the SortedSet itself are subject to changes (add/edit/remove).
thanks.

Edit: removed
db
Cross posted
http://www.java-forums.org/awt-swing/47138-how-automatically-highlight-bold-words-jtable-cell.html
Edited by: Darryl Burke

Strange JTable behaviour - everything is highlighted

Hello all,
im experiencing some strange JTable behaviour, and im not so sure why. When i run my program, the JTable appears, but all the cells are highlighted in advance. Also, i can now only select one cell at a time. I have set myTable.setSelectionModeListSelectionModel.SINGLE_INTERVAL_SELECTION); myTable.setCellSelectionEnabled(true);and my renderer code is below. I call the renderer by using the setDefaultRenderer method with(Object.class,myRenderer).
I have also changed isCellEditable to return true. If i dont use Object.class, and try to use my own custom class, the JTable is not all highlighted, but it doesnt seem to use myRenderer, and when i click on the header of Column A, all cells from column B and beyond become highlight, which is not normal behaviour. I thought the colum you selected should be highlighted.
Sorry for the long post, i hope the above makes sense...this is really quite bizzare, and im not so sure why this is happening. Thanks for any advice you can give, regards, Rupz
import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.border.*;
import java.awt.Component;
import java.awt.Color;
import java.awt.Rectangle;
import java.util.*;
import java.awt.*;
public class MyTableCellRenderer extends DefaultTableCellRenderer{
     private Font cellFont;
     private LineBorder selectBorder;
    private EmptyBorder emptyBorder;
     public MyTableCellRenderer() {
          super();
          setOpaque(true);
          emptyBorder = new EmptyBorder(1, 2, 1, 2);
          cellFont = new Font("Times", Font.PLAIN, 10);
          setFont(cellFont);
          selectBorder = new LineBorder(Color.red);
     private boolean isHeaderCell(int row, int column){return column == 0;}
     public Component getTableCellRendererComponent (JTable myTable, Object value, boolean isSelected, boolean hasFocus, int row, int column){
          //super.getTableCellRendererComponent(myTable, value, isSelected, hasFocus,row, column);
          if (isSelected){
               super.setForeground(myTable.getSelectionForeground());
               super.setBackground(myTable.getSelectionBackground());
               setBorder(selectBorder);
          else{
               super.setForeground(myTable.getSelectionForeground());
               super.setBackground(myTable.getSelectionBackground());
               setBorder(emptyBorder);
     if (hasFocus) {
          setBorder(selectBorder);
          if (myTable.isCellEditable(row,column)) {
               super.setForeground(UIManager.getColor("Table.focusCellForeground"));
               super.setBackground(UIManager.getColor("Table.focusCellBackground"));
     else {setBorder(noFocusBorder);}
     setValue(value, isSelected, hasFocus, row, column);
//      Color bDis = getBackground();
//      boolean colourEquals = (bDis != null) && (bDis.equals(myTable.getBackground()) ) & myTable.isOpaque();
//      setOpaque (!colourEquals);
     return this;
     public void setValue (Object value, boolean hasFocus, boolean isSelected, int row, int column){
          if (value instanceof myCell){
               myCell foo = (myCell)value;
               Object data = foo.getValue(row,column);
               if (isHeaderCell(row, column)) {
                //label cells are center aligned
                    setHorizontalAlignment(JTextField.CENTER);
                   }else {
                          if (data instanceof Number) {
                              //numbers are right justified
                        setHorizontalAlignment(JTextField.RIGHT);
                          }else {
                              //everything else is left justified
                        setHorizontalAlignment(JTextField.LEFT);
                      //value to display in table
                   setText((data == null) ? "" : data.toString());
           else {
                      //not cell object so render with toString of that object
                      setText((value == null) ? "" : value.toString());

Hi VV!
thanks for the reply - now the table isnt all highlight when loaded, but as for cell celection..thats a different matter. I did have myTable.setCellSelectionEnabled(true); but no, the cell behaviour is really, eally weird, quite hard to explain, but here goes.
If i try to select cell D1 and D2 - D1 is selected, D2, E2,F2 and so on become selected. If i try to add D3 to the mix, the entire row 3 is selected, and as soon as i let go of the mouse button, the entire table except row 1 gets selected. really really weird. Below is my tableModel and what i do to the table. Thanks for your help,
regards
Rupz
myTable.setModel(new myTableModel(this,40,40));
     // Create a row-header to display row numbers.
     // This row-header is made of labels whose Borders,
     // Foregrounds, Backgrounds, and Fonts must be
     // the one used for the table column headers.
     // Also ensure that the row-header labels and the table
     // rows have the same height.
     numRows = myTable.getColumnCount();
     numCols = myTable.getRowCount();
     TableColumn       aColumn   = myTable.getColumnModel().getColumn(0);
     TableCellRenderer aRenderer = myTable.getTableHeader().getDefaultRenderer();
     Component aComponent = aRenderer.getTableCellRendererComponent(myTable, aColumn.getHeaderValue(), false, false, -1, 0);
     Font aFont       = aComponent.getFont();
     Color aBackground = aComponent.getBackground();
     Color aForeground = aComponent.getForeground();
     Border      border = (Border)UIManager.getDefaults().get("TableHeader.cellBorder");
     FontMetrics metrics = getFontMetrics(cellFont);
      * Creating a panel to be used as the row header.
      * Since I'm not using any LayoutManager,
      * a call to setPreferredSize().
     JPanel pnl = new JPanel((LayoutManager)null);
     Dimension dim = new Dimension( 40, rowHeight*numRows);
     pnl.setPreferredSize(dim);
     // Adding the row header labels
     dim.height = rowHeight;
     for (int ii=0; ii<numRows; ii++) {
       JLabel lbl = new JLabel(Integer.toString(ii+1), SwingConstants.CENTER);
       lbl.setFont(aFont);
       lbl.setBackground(aBackground);
       lbl.setForeground(aForeground);
       lbl.setBorder(border);
       lbl.setBounds(0, ii*dim.height, dim.width, dim.height);
       pnl.add(lbl);
     JViewport vp = new JViewport();
     dim.height = rowHeight*numRows;
     vp.setViewSize(dim);
     vp.setView(pnl);
     // Set resize policy and make sure
     // the table's size is tailored
     // as soon as it gets drawn.
     myTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     Dimension dimScpViewport = myTable.getPreferredScrollableViewportSize();
     if (numRows>30) dimScpViewport.height = 30*rowHeight;
     else           dimScpViewport.height = numRows*rowHeight;
     if (numCols>15)
       dimScpViewport.width = 15*myTable.getColumnModel().getTotalColumnWidth()/numCols;
     else
       dimScpViewport.width = myTable.getColumnModel().getTotalColumnWidth();
     myTable.setPreferredScrollableViewportSize(dimScpViewport);
     myTable.repaint();
And the table model
public class myTableModel extends DefaultTableModel {
     private MySpread mySpreadsheet;
     public myTableModel (MySpread aSpreadsheet){
          super();
          mySpreadsheet = aSpreadsheet;
     public myTableModel (MySpread aSpreadsheet, int rows,int cols){
          super(rows,cols);
//                for(int x = 0; x < rows; x++) {
//                      myCell temp = new myCell(new Integer(x+1));
//                  super.setValueAt(temp, x, 0);
        for(int x =0 ; x < rows; x++)
         for (int y = 0; y < cols; y++)
          // we initialize it here
          super.setValueAt(new myCell(rows,cols,("")),x,y);
     mySpreadsheet = aSpreadsheet;
     public boolean isCellEditable(int row, int column) {return true;}

Custom JTable cell editor problem

I have a custom JTable cell editor which is a JPanel with 2 JtextFields, One for a name, the other for a data value. My problem lies in when the the cell is selected and then the user start typing. The JTextfield outline shows up, but there is no carat. I can only edit the cell when I click the mouse in it again. I have my isCellEditable method set to only allow editing on 2 mouse clicks, but I did try it with just returning true and had the same problem. Please help.
Code:
class cellValue {
String name;
String data;
Color nameColor;
Color dataColor;
Font font;
public cellValue(String n, String d, Color nC, Color dC, Font ff){
name = n;
data = d;
nameColor = nC;
dataColor = dC;
font = ff;
} //end class
public class TextFieldCellEditor extends JPanel implements TableCellRenderer, TableCellEditor{
private EventListenerList listenerList = new EventListenerList();
private ChangeEvent event = new ChangeEvent(this);
private cellValue s;
private int e_row=0;
private int e_col=0;
private JTextField ta;
private JTextField tb;
public TextFieldCellEditor() {
setLayout(new GridBagLayout());
ta = new JTextField();
tb = new JTextField();
tb.setHorizontalAlignment(SwingConstants.RIGHT);
add(ta, new GridBagConstraints(0,0,1,1,0.6,0.0,java.awt.GridBagConstraints.WEST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
add(new JLabel(" "),new GridBagConstraints(1,0,1,1,0.1,0.0,java.awt.GridBagConstraints.WEST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
add(tb, new GridBagConstraints(2,0,1,1,0.3,0.0,java.awt.GridBagConstraints.EAST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
} //end init
public Component getTableCellRendererComponent(JTable table, Object value,boolean isSelected,
boolean hasFocus,int row, int column) {
s = (cellValue)value;
e_row = row;
e_col = column;
ta.setText(s.name);
tb.setText(s.data);
ta.setFont(s.font);
tb.setFont(s.font);
ta.setForeground(s.nameColor);
tb.setForeground(s.dataColor);
setForeground(table.getForeground());
setBackground(table.getBackground());
ta.setBackground(table.getBackground());
tb.setBackground(table.getBackground());
ta.setCaretColor(Color.WHITE);
tb.setCaretColor(Color.WHITE);
return (JComponent)(this);
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
return (getTableCellRendererComponent(table, value,isSelected, true, row, column));
public boolean isCellEditable(EventObject e) {
if (e instanceof MouseEvent) {
return ((MouseEvent)e).getClickCount() >= 2;
} return true;
// return true;
public boolean shouldSelectCell(EventObject anEvent) {
return (true);
public void cancelCellEditing() {
public boolean stopCellEditing() {
fireEditingStopped();
return (true);
public Object getCellEditorValue() {
return (ta.getText());
public void addCellEditorListener(CellEditorListener l){
try {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {requestFocus();}
} catch (Exception e) {};
listenerList.add(CellEditorListener.class, l);
public void removeCellEditorListener(CellEditorListener l) {
listenerList.remove(CellEditorListener.class, l);
protected void fireEditingStopped(){
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i -= 2)
((CellEditorListener)listeners[i+1]).editingStopped(event);
protected void fireEditingCanceled() {
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i -= 2)
((CellEditorListener)listeners[i+1]).editingCanceled(event);
} //end class

Thanks again for the repley.
I tried removing the celleditorlistener and using the setSurrenderFocusOnKeystroke, but it did not work. The textfield is editable;
I did change:
public void addCellEditorListener(CellEditorListener l){
try {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {ta.requestFocus();}
} catch (Exception e) {};
listenerList.add(CellEditorListener.class, l);
}This allows the first textfield to request focus and this seems to work. But when I highlight a cell, then start typing, the first character I type puts me into the editor, but it is lost. Example:
I type hello
and get ello in the cell. Then when I press enter the input is excepted and the selection goes to the next cell, but I cannot move the Highlight cursor at all, seems locked. The only way I can continue to the next cell is to use the mouse.
You said you had a cell editor working. Would you care to share as an example. This is killing me to get this to work properly.
Thanks again
Dave

Shading part of a JTable Cell dependent upon the value of the cell

Hi
Was hoping some one woudl be able to provide some help with this. I'm trying to create a renderer that will "shade" part of a JTable cell's background depending upon the value in the cell as a percentage (E.g. if the cell contains 0.25 then a quarter of the cell background will be shaded)
What I've got so far is a renderer which will draw a rectangle whose width is the relevant percentage of the cell's width. (i.e. the width of the column) based on something similar I found in the forum but the part I'm struggling with is getting it to draw this rectangle in any cell other than the first cell. I've tried using .getCellRect(...) to get the x and y position of the cell to draw the rectangle but I still can't make it work.
The code for my renderer as it stands is:
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
public class PercentageRepresentationRenderer extends JLabel implements TableCellRenderer{
     double percentageValue;
     double rectWidth;
     double rectHeight;
     JTable table;
     int row;
     int column;
     int x;
     int y;
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
          if (value instanceof Number)
               this.table = table;
               this.row = row;
               this.column = column;
               Number numValue = (Number)value;
               percentageValue = numValue.doubleValue();
               rectHeight = table.getRowHeight(row);
               rectWidth = percentageValue * table.getColumnModel().getColumn(column).getWidth();
          return this;
     public void paintComponent(Graphics g) {
        x = table.getCellRect(row, column, false).x;
        y = table.getCellRect(row, column, false).y;
          setOpaque(false);
        Graphics2D g2d = (Graphics2D)g;
        g2d.fillRect(x,y, new Double(rectWidth).intValue(), new Double(rectHeight).intValue());
        super.paintComponent(g);
}and the following code produces a runnable example:
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class PercentageTestTable extends JFrame {
     public PercentageTestTable()
          Object[] columnNames = new Object[]{"A","B"};
          Object[][] tableData = new Object[][]{{0.25,0.5},{0.75,1.0}};
          DefaultTableModel testModel = new DefaultTableModel(tableData,columnNames);
          JTable test = new JTable(testModel);
          test.setDefaultRenderer(Object.class, new PercentageRepresentationRenderer());
          JScrollPane scroll = new JScrollPane();
          scroll.getViewport().add(test);
          add(scroll);
     public static void main(String[] args)
          PercentageTestTable testTable = new PercentageTestTable();
          testTable.pack();
          testTable.setVisible(true);
          testTable.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}If anyone could help or point me in the right direction, I'd appreciate it.
Ruanae

This is an example I published some while ago -
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Fred120 extends JPanel
    static final Object[][] tableData =
        {1, new Double(10.0)},
        {2, new Double(20.0)},
        {3, new Double(50.0)},
        {4, new Double(10.0)},
        {5, new Double(95.0)},
        {6, new Double(60.0)},
    static final Object[] headers =
        "One",
        "Two",
    public Fred120() throws Exception
        super(new BorderLayout());
        final DefaultTableModel model = new DefaultTableModel(tableData, headers);
        final JTable table = new JTable(model);
        table.getColumnModel().getColumn(1).setCellRenderer( new LocalCellRenderer(120.0));
        add(table);
        add(table.getTableHeader(), BorderLayout.NORTH);
    public class LocalCellRenderer extends DefaultTableCellRenderer
        private double v = 0.0;
        private double maxV;
        private final JPanel renderer = new JPanel(new GridLayout(1,0))
            public void paintComponent(Graphics g)
                super.paintComponent(g);
                g.setColor(Color.CYAN);
                int w = (int)(getWidth() * v / maxV + 0.5);
                int h = getHeight();
                g.fillRect(0, 0, w, h);
                g.drawRect(0, 0, w, h);
        private LocalCellRenderer(double maxV)
            this.maxV = maxV;
            renderer.add(this);
            renderer.setOpaque(true);
            renderer.setBackground(Color.YELLOW);
            renderer.setBorder(null);
            setOpaque(false);
            setHorizontalAlignment(JLabel.CENTER);
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col)
            final JLabel label = (JLabel) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
            if (value instanceof Double)
                v = ((Double)value).doubleValue();
            return renderer;
    public static void main(String[] args) throws Exception
        final JFrame frame = new JFrame("Fred120");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(new Fred120());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
}

Problem in jtable cell

Hi
I am facing one problem. there is some data should be displayed in Jtable cell.
The thing is that the whole data shall be visible in the cell.. for this I am writing one renderer.. but I could not find the desire solution.. please check it out
class Item_Details extends JFrame {
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     ApsJTable imageTable = null;
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     String[] columns = new String[2];
     ArrayList data1 = new ArrayList();
     String[] columns1 = new String[2];
     ItemTableModel itemTableModel = null;
     ItemTableModel itemTableModel1 = null;
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          super("Item Details");
         this.setSize(600,100);
          this.setVisible(true);
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          ////////////// Get data for first Table Model ////////////////////////////
          data = getRowData();
          columns = getColData();
          System.out.println(columns[0]);
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         /////////////Get Data for Second Table Model //////////////////////////////
          try{
                    data1 = getRowData1();
             }catch(Exception e){}
          columns1 = getColumns1();
         itemTableModel1 = new ItemTableModel(data1,columns1);
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          itemTable = new ApsJTable(itemTableModel);
          imageTable = new ApsJTable(itemTableModel1);
          this.itemTable.setShowGrid(false);
          this.imageTable.setShowGrid(false);
          this.itemTable.setColumnSelectionAllowed(false);
          this.imageTable.setColumnSelectionAllowed(false);
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          this.imageTable.setRowHeight(getImageHeight()+3);
          JScrollPane tableScrollPane = new JScrollPane(this.imageTable,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
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          tableScrollPane.getRowHeader().setPreferredSize(new Dimension(800, 0));
          itemTable.getTableHeader().setReorderingAllowed(false);
          itemTable.setColumnSelectionAllowed(false);
          //itemTable.setRowHeight(25);
          itemTable.setCellSelectionEnabled(false);
          itemTable.setFocusable(false);
          imageTable.getTableHeader().setReorderingAllowed(false);
          imageTable.setFocusable(false);
          imageTable.setCellSelectionEnabled(false);
          //tableScrollPane.setOpaque(false);
          itemTable.setAutoCreateColumnsFromModel(false);
          int columnCount = itemTable.getColumnCount();
          for(int k=0;k<columnCount;k++)
          /*     TableCellRenderer renderer = null;
               TableCellEditor editor = null;
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               editor = new TextAreaCellEditor();
               TableColumn column = new TableColumn(k,itemTable.getColumnModel().getColumn(k).getWidth(),renderer, editor);
                    itemTable.addColumn(column);*/
               itemTable.getColumnModel().getColumn(k).setCellRenderer(new MultiLineCellRenderer());
               //itemTable.getColumnModel().getColumn(k).setCellEditor(new TextAreaCellEditor());
////////////---------------------- Here background color is being set--------------//////////////////
          this.imageTable.getParent().setBackground(Color.WHITE);
          this.itemTable.getParent().setBackground(Color.WHITE);
          tableScrollPane.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER,this.itemTable.getTableHeader());
          getContentPane().add(tableScrollPane,BorderLayout.CENTER);
          getContentPane().setVisible(true);
     public static void main(String[] str){
          com.incors.plaf.alloy.AlloyLookAndFeel.setProperty("alloy.licenseCode", "2005/05/28#[email protected]#1v2pej6#1986ew");
          try {
            javax.swing.LookAndFeel alloyLnF = new com.incors.plaf.alloy.AlloyLookAndFeel();
            javax.swing.UIManager.setLookAndFeel(alloyLnF);
          } catch (javax.swing.UnsupportedLookAndFeelException ex) {
          ex.printStackTrace();
          Item_Details ID = new Item_Details();
          ID.setVisible(true);
public ArrayList getRowData()
     ArrayList rowData=new ArrayList();
     Hashtable item = new Hashtable();
     item.put(new Long(0),new String("Item No:"));
     item.put(new Long(1),new String("RED-1050"));
     rowData.add(0,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Description:"));
     item.put(new Long(1),new String("SYSTEM 18 mbh COOLING 13 mbh HEATING 230/208 v POWER AIRE "));
     rowData.add(1,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Stage:"));
     item.put(new Long(1),new String("Draft"));
     rowData.add(2,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Price: "));
     item.put(new Long(1),new String(" 999.00"));
     rowData.add(3,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(4,item);
     /*item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(5,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(6,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(7,item);
     return rowData;
public String[] getColData()
     String[] colData = new String[]{"Attribute","Value"};
     return colData;
public ArrayList getRowData1()throws MalformedURLException{
     ArrayList rowData = new ArrayList();
     Hashtable item = new Hashtable();
     String str = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
     URL url = new URL(str);
     ImageIcon ic = new ImageIcon(url);
     ImageIcon scaledImage = new ImageIcon(ic.getImage().getScaledInstance(getImageHeight(), -1,Image.SCALE_SMOOTH));
     item.put(new Long(0), scaledImage);
     rowData.add(0,item);
     String str1 = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
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     ImageIcon scaledImage1 = new ImageIcon(ic1.getImage().getScaledInstance(120, -1,Image.SCALE_DEFAULT));
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     String[] colData = new String[]{"Image"};
     return colData;
public int getImageHeight(){
     ImageIcon ic = new ImageIcon("c:\\image\\ImageNotFound.gif");
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       public MultiLineCellRenderer() {
            setLineWrap(true);
            setWrapStyleWord(true);
         JScrollPane m_scroll = new JScrollPane(this,
                   JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                   JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
         setOpaque(true);
       public Component getTableCellRendererComponent(JTable table, Object value,
                    boolean isSelected, boolean hasFocus, int row, int column) {
            /*if (isSelected) {
           setForeground(table.getSelectionForeground());
           setBackground(table.getSelectionBackground());
         } else {
           setForeground(table.getForeground());
           setBackground(table.getBackground());
        // setFont(table.getFont());
        /* if (hasFocus) {
           setBorder( UIManager.getBorder("Table.focusCellHighlightBorder") );
           if (table.isCellEditable(row, column)) {
             setForeground( UIManager.getColor("Table.focusCellForeground") );
             setBackground( UIManager.getColor("Table.focusCellBackground") );
         } else {
           setBorder(new EmptyBorder(1, 2, 1, 2));
         int width = table.getColumnModel().getColumn(column).getWidth();
          //setSize(width, 1000);
          int rowHeight = getPreferredSize().height;
          if (table.getRowHeight(row) != rowHeight)
               table.setRowHeight(row, rowHeight);
         setText((value == null) ? "" : value.toString());
         return this;
     }what wrong with this code..
Thanks

In summary, you have one or more columns for which the data must be wholly visible - correct? If you need all the columns to show the whole of their data, you are goinf to have to expand the table, otherwise you can expand a column with something like
myTable.getColumnModel().getColumn(whichever).setPreferredWidth(whatever);

Problem in JTable cell renderer

Hi
One problem in JTable cell. Actually I am using two tables while I am writing renderer for word raping in first table .. but it is affected in last column only remain is not being effected�. Please chaek it out what is exact I am missing�
Thanks
package com.apsiva.tryrowmerge;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.EventObject;
import java.util.Hashtable;
import java.net.*;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
class Item_Details extends JFrame {
    ApsJTable itemTable = null;
     ApsJTable imageTable = null;
     ArrayList data = new ArrayList();
     String[] columns = new String[2];
     ArrayList data1 = new ArrayList();
     String[] columns1 = new String[2];
     ItemTableModel itemTableModel = null;
     ItemTableModel itemTableModel1 = null;
     public Item_Details()
          super("Item Details");
         this.setSize(600,100);
         this.setBackground(Color.WHITE);
          this.setVisible(true);
         init();
     private void init(){
          ////////////// Get data for first Table Model ////////////////////////////
          data = getRowData();
          columns = getColData();
          System.out.println(columns[0]);
         itemTableModel = new ItemTableModel(data,columns);
         /////////////Get Data for Second Table Model //////////////////////////////
          try{
                    data1 = getRowData1();
             }catch(Exception e){}
          columns1 = getColumns1();
         itemTableModel1 = new ItemTableModel(data1,columns1);
         ///////////// Set Data In Both Table Model //////////////////////////////////
          itemTable = new ApsJTable(itemTableModel);
          imageTable = new ApsJTable(itemTableModel1);
          this.itemTable.setShowGrid(false);
          this.imageTable.setShowGrid(false);
          this.itemTable.setColumnSelectionAllowed(false);
          this.imageTable.setColumnSelectionAllowed(false);
          System.out.println(itemTable.getColumnCount());
          this.imageTable.setRowHeight(getImageHeight()+3);
          JScrollPane tableScrollPane = new JScrollPane(this.imageTable,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
          tableScrollPane.setRowHeaderView(this.itemTable);
          //itemTable.getColumnModel().getColumn(0).setMaxWidth(200);
          itemTable.getColumnModel().getColumn(0).setPreferredWidth(200);
          itemTable.getColumnModel().getColumn(1).setPreferredWidth(600);
          tableScrollPane.getRowHeader().setPreferredSize(new Dimension(800, 0));
          itemTable.getTableHeader().setResizingAllowed(false);
          itemTable.getTableHeader().setReorderingAllowed(false);
          itemTable.setColumnSelectionAllowed(false);
          //itemTable.setRowHeight(25);
          itemTable.setCellSelectionEnabled(false);
          itemTable.setFocusable(false);
          imageTable.getTableHeader().setReorderingAllowed(false);
          imageTable.setFocusable(false);
          imageTable.setCellSelectionEnabled(false);
          //tableScrollPane.setOpaque(false);
          itemTable.setAutoCreateColumnsFromModel(false);
          int columnCount = itemTable.getColumnCount();
          for(int k=0;k<columnCount;k++)
               TableCellRenderer renderer = null;
               TableCellEditor editor = null;
               renderer = new TextAreaCellRenderer();     // NEW
          //     editor = new TextAreaCellEditor();
          //     TableColumn column = new TableColumn(k,itemTable.getColumnModel().getColumn(k).getWidth(),renderer, editor);
               System.out.println(k);
               itemTable.getColumnModel().getColumn(k).setCellRenderer(renderer);
               //itemTable.getColumnModel().getColumn(k).setCellEditor(editor);
               /*itemTable.getColumnModel().getColumn(1).setCellRenderer(new TextAreaCellRenderer());
               itemTable.getColumnModel().getColumn(1).setCellEditor(new TextAreaCellEditor());*/
//               itemTable.setShowGrid(false);
               //itemTable.addColumn(column);
               //itemTable.getColumnModel().getColumn(k).setCellRenderer(new MultiLineCellRenderer());
               //itemTable.getColumnModel().getColumn(k).setCellEditor(new TextAreaCellEditor());
////////////---------------------- Here background color is being set--------------//////////////////
          this.imageTable.getParent().setBackground(Color.WHITE);
          this.itemTable.getParent().setBackground(Color.WHITE);
          tableScrollPane.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER,this.itemTable.getTableHeader());
          getContentPane().add(tableScrollPane,BorderLayout.CENTER);
          getContentPane().setVisible(true);
     public static void main(String[] str){
          com.incors.plaf.alloy.AlloyLookAndFeel.setProperty("alloy.licenseCode", "2005/05/28#[email protected]#1v2pej6#1986ew");
          try {
            javax.swing.LookAndFeel alloyLnF = new com.incors.plaf.alloy.AlloyLookAndFeel();
            javax.swing.UIManager.setLookAndFeel(alloyLnF);
          } catch (javax.swing.UnsupportedLookAndFeelException ex) {
          ex.printStackTrace();
          Item_Details ID = new Item_Details();
          ID.setVisible(true);
public ArrayList getRowData()
     ArrayList rowData=new ArrayList();
     Hashtable item = new Hashtable();
     item.put(new Long(0),new String("Item No:aaaaaaa aaaaaaaa aaaaaaaaa aaaaaa"));
     item.put(new Long(1),new String("RED-1050"));
     rowData.add(0,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Description:rt r trtrt rttrytrr tytry trytry tr tr rty thyjyhjhnhnhgg hhjhgjh"));
     item.put(new Long(1),new String("SYSTEM 18 mbh COOLING 13 mbh HEATING 230/208 v POWER AIRE "));
     rowData.add(1,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Stage:"));
     item.put(new Long(1),new String("Draft"));
     rowData.add(2,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Price: "));
     item.put(new Long(1),new String("999.00"));
     rowData.add(3,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(4,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(5,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(6,item);
     /*item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(5,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(6,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(7,item);
     return rowData;
public String[] getColData()
     String[] colData = new String[]{"Attribute","Value"};
     return colData;
public ArrayList getRowData1()throws MalformedURLException{
     ArrayList rowData = new ArrayList();
     Hashtable item = new Hashtable();
     String str = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
     URL url = new URL(str);
     ImageIcon ic = new ImageIcon(url);
     ImageIcon scaledImage = new ImageIcon(ic.getImage().getScaledInstance(getImageHeight(), -1,Image.SCALE_SMOOTH));
     item.put(new Long(0), scaledImage);
     rowData.add(0,item);
     String str1 = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
     URL url1 = new URL(str1);
     ImageIcon ic1 = new ImageIcon(url1);
     ImageIcon scaledImage1 = new ImageIcon(ic1.getImage().getScaledInstance(120, -1,Image.SCALE_DEFAULT));
     item.put(new Long(0),scaledImage1);
     rowData.add(1,item);
     return rowData;
public String[] getColumns1(){
     String[] colData = new String[]{"Image"};
     return colData;
public int getImageHeight(){
     ImageIcon ic = new ImageIcon("c:\\image\\ImageNotFound.gif");
     return ic.getIconHeight();
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer
     public TextAreaCellRenderer() {
          setEditable(false);
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(JTable table,
          Object value, boolean isSelected, boolean hasFocus,
          int nRow, int nCol)
          if (value instanceof String)
               setText((String)value);
          // Adjust row's height
          int width = table.getColumnModel().getColumn(nCol).getWidth();
          setSize(width, 1000);
          int rowHeight = getPreferredSize().height;
          if (table.getRowHeight(nRow) != rowHeight)
               table.setRowHeight(nRow, rowHeight);
          this.setBackground(Color.WHITE);
          return this;

I think Problem is between these code only
for(int k=0;k<columnCount;k++)
               TableCellRenderer renderer = null;
               TableCellEditor editor = null;
               renderer = new TextAreaCellRenderer();
                                                            itemTable.getColumnModel().getColumn(k).setCellRenderer(renderer);or in this renderer
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer
     public TextAreaCellRenderer() {
          setEditable(false);
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(JTable table,
          Object value, boolean isSelected, boolean hasFocus,
          int nRow, int nCol)
          if (value instanceof String)
               setText((String)value);
          // Adjust row's height
          int width = table.getColumnModel().getColumn(nCol).getWidth();
          setSize(width, 1000);
          int rowHeight = getPreferredSize().height;
          if (table.getRowHeight(nRow) != rowHeight)
               table.setRowHeight(nRow, rowHeight);
          this.setBackground(Color.WHITE);
          return this;
}

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.

Button to change bg-color in JTable cell

Hello!
I would like to change the background color of a cell with a klick on a button.
There will be 3 colors, and the selected cell are the only one thats going to change.
How do I do that?
Heres my code:
import javax.swing.*;
import java.awt.Color;
import java.awt.Component;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
public class Kinna extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JTabbedPane jTabbedPane = null;
     private JScrollPane jScrollPane = null;
     private JTable jTable = null;
     private JButton jButtonRed = null;
     private JButton jButtonGreen = null;
     private JButton jButtonBlue = null;
     private JButton jButtonNewWeek = null;
     private JButton jButtonDelWeek = null;
      * This method initializes jTabbedPane
      * @return javax.swing.JTabbedPane
     private JTabbedPane getJTabbedPane() {
          if (jTabbedPane == null) {
               jTabbedPane = new JTabbedPane();
               jTabbedPane.setBounds(new Rectangle(105, 45, 545, 488));
               jTabbedPane.addTab(null, null, getJScrollPane(), null);
          return jTabbedPane;
      * This method initializes jScrollPane
      * @return javax.swing.JScrollPane
     private JScrollPane getJScrollPane() {
          if (jScrollPane == null) {
               jScrollPane = new JScrollPane();
               jScrollPane.setViewportView(getJTable());
          return jScrollPane;
      * This method initializes jTable
      * @return javax.swing.JTable
     private JTable getJTable() {
          if (jTable == null) {
               Object[] head = {"Namn", "M�ndag", "Tisdag", "Onsdag", "Torsdag", "Fredag"};
               Object[][] data = {{"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"},
                                        {"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"}};
               jTable = new JTable(data, head);
                  // This table shades every other column yellow
          return jTable;
      * This method initializes jButtonRed
      * @return javax.swing.JButton
     private JButton getJButtonRed() {
          if (jButtonRed == null) {
               jButtonRed = new JButton("R�d");
               jButtonRed.setBounds(new Rectangle(15, 30, 76, 31));
               jButtonRed.setText("R�d");
               jButtonRed.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
          return jButtonRed;
      * This method initializes jButtonGreen
      * @return javax.swing.JButton
     private JButton getJButtonGreen() {
          if (jButtonGreen == null) {
               jButtonGreen = new JButton("R�d");
               jButtonGreen.setBounds(new Rectangle(15, 75, 76, 31));
               jButtonGreen.setText("Gr�n");
          return jButtonGreen;
      * This method initializes jButtonBlue
      * @return javax.swing.JButton
     private JButton getJButtonBlue() {
          if (jButtonBlue == null) {
               jButtonBlue = new JButton("R�d");
               jButtonBlue.setBounds(new Rectangle(15, 120, 76, 31));
               jButtonBlue.setText("Bl�");
          return jButtonBlue;
      * This method initializes jButtonNewWeek
      * @return javax.swing.JButton
     private JButton getJButtonNewWeek() {
          if (jButtonNewWeek == null) {
               jButtonNewWeek = new JButton();
               jButtonNewWeek.setBounds(new Rectangle(270, 0, 91, 31));
               jButtonNewWeek.setText("Ny Vecka");
               jButtonNewWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         int i = getJTabbedPane().getSelectedIndex() + 1;
                         String tab = "Index: " + i;
                         getJTabbedPane().addTab(tab, new JLabel("Hello"));
                         getJTabbedPane().setSelectedIndex(getJTabbedPane().getTabCount()-1);
          return jButtonNewWeek;
      * This method initializes jButtonDelWeek
      * @return javax.swing.JButton
     private JButton getJButtonDelWeek() {
          if (jButtonDelWeek == null) {
               jButtonDelWeek = new JButton();
               jButtonDelWeek.setBounds(new Rectangle(375, 0, 121, 31));
               jButtonDelWeek.setText("Ta bort vecka");
               jButtonDelWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         getJTabbedPane().removeTabAt(getJTabbedPane().getSelectedIndex());
          return jButtonDelWeek;
      * @param args
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    Kinna thisClass = new Kinna();
                    thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    thisClass.setVisible(true);
      * This is the default constructor
     public Kinna() {
          super();
          initialize();
      * This method initializes this
      * @return void
     private void initialize() {
          this.setSize(670, 580);
          this.setContentPane(getJContentPane());
          this.setTitle("JFrame");
      * This method initializes jContentPane
      * @return javax.swing.JPanel
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jContentPane.add(getJTabbedPane(), null);
               jContentPane.add(getJButtonRed(), null);
               jContentPane.add(getJButtonGreen(), null);
               jContentPane.add(getJButtonBlue(), null);
               jContentPane.add(getJButtonNewWeek(), null);
               jContentPane.add(getJButtonDelWeek(), null);
          return jContentPane;
} // @jve:decl-index=0:visual-constraint="29,25"

If you have a different color for every cell in the table, then maybe it would be easier to store a custom Object in the TableModel that has two pieces of information:
a) the text to be displayed
b) the background color of the text.
Then you can write a custom renderer that uses both pieces of information to renderer the cell correctly.
Here is an untested example of what the custom renderer might look like:
class ColorRenderer extends DefaultTableCellRenderer
     public Component getTableCellRendererComponent(
               JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
          super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
          CustomObject custom = (CustomObject)value;
          setText( custom.getText() );
          if (!isSelected)
               setBackground( custom.getBackground() );
          return this;
}

Icons in JTable cells

hi, i have a table and one cell is supposed to tell if an item is a file or a directory, and i want to display dir.png or fil.png depending on the type. this column in the table displays names of files and an icon indicating if its a directory or a file.
please how can i get started with this ?

Try this example, hope this works well on your side.
import java.awt.Component;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.filechooser.FileSystemView;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;
public class MyTableSample extends JFrame {
     public static void main(String[] args) throws Exception {
          new MyTableSample();
     public MyTableSample() {
          setSize(550, 400);//Set the frame size
          setDefaultCloseOperation(3);//Exit on close
          List<File> list = new ArrayList<File>();//Let's say these are your files store in the List.
          list.add(new File("C:\\test.txt"));//One is a file
          list.add(new File("C:\\downloads"));//And the other a directory
          //Create a table model for the table with 2 columns. One displays the type of file and the other is the filename.
          DefaultTableModel tableModel = new DefaultTableModel(new String[] { "Type", "Filename" }, 0);
          JTable table = new JTable(tableModel);//Create the table.
          TableColumnModel columnModel = table.getColumnModel();//Get the column model instance of the table.
          columnModel.getColumn(0).setPreferredWidth(2);//The icon column should be a bit narrower.
          columnModel.getColumn(1).setPreferredWidth(490);//The filename column is wider.
          columnModel.getColumn(0).setCellRenderer(new IconRenderer());//Set the cell renderer to our custom icon renderer.
          //Populate the rows.
          for (int i = 0; i < list.size(); i++) {
               //the first element of the array (list.get(i)) is a File object. I'll explain below why.
               //the second element of the array (list.get(i).getName()) displays the filename of the file. It could also be list.get(i).getAbsolutePath().
               tableModel.addRow(new Object[] { list.get(i), list.get(i).getName() });
          getContentPane().add(new JScrollPane(table));//Add the table to the frame.
          setVisible(true);//make it visible.
     //This is our custom cell renderer
     class IconRenderer extends DefaultTableCellRenderer {
          @Override
          public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
               //override getTableCellRendererComponent(). This will always return a JLable instance.
               final JLabel label = (JLabel) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
               //A while ago we passed a File object to the object array. The value variable is the File object itself!
               if (value != null && value instanceof File) {//make sure its not null and an instance of File
                    File file = (File) value;
                    label.setIcon(FileSystemView.getFileSystemView().getSystemIcon(file));//Use this method to set the proper icon for the file.
                    label.setText("");//Blank out your Label's text.
               return label;
}

JTable Cell with two icons

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));
}

JTable cell Background Color problem

I overriden the table renderer and tried to chenge the color of only that row which has greater value in the third column. I coded the logic but it set the color of all the rows. The custom tablecellrendere code is as follows
      public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,boolean hasFocus, int row, int column)
            cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
               if(vuti[0]==0)
                    //cell.setBackground(Color.pink);
                    vuti[0]=counter;
               else
                    if (counter>vuti[0] && !isSelected)
                      vuti[0]=counter;
                      cell.setBackground(Color.lightGray);
                  else if(counter<vuti[0])
                    cell.setBackground(Color.white);
            return cell;
      }

In the code that sets the background, you have a if - else (if - else if) structure. What's the default setting, when none of the 3 conditions are met?
And learn to indent your code correctly so that code blocks are readily apparent.
[http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html]
db

Centering text in JTable cells

How do I center the text in JTable cells? By default, all data is left aligned.
Thanks,
Jason

Read up on cell renderers from the Swing tutorial on "Using Tables":
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#editrender
Here's an example to get you started.
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
public class TableRenderer extends JFrame
    public TableRenderer()
        String[] columnNames = {"Date", "String", "Integer", "Decimal", "Boolean"};
        Object[][] data =
            {new Date(), "A", new Integer(1), new Double(5.1), new Boolean(true)},
            {new Date(), "B", new Integer(2), new Double(6.2), new Boolean(false)},
            {new Date(), "C", new Integer(3), new Double(7.3), new Boolean(true)},
            {new Date(), "D", new Integer(4), new Double(8.4), new Boolean(false)}
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable( model )
            // Returning the Class of each column will allow different
            // renderers to be used based on Class
            public Class getColumnClass(int column)
                return getValueAt(0, column).getClass();
        JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );
        // Create cell renderer
        TableCellRenderer centerRenderer = new CenterRenderer();
        // Use renderer on a specific column
        TableColumn column = table.getColumnModel().getColumn(3);
        column.setCellRenderer( centerRenderer );
        // Use renderer on a specific Class
        table.setDefaultRenderer(String.class, centerRenderer);
    public static void main(String[] args)
        TableRenderer frame = new TableRenderer();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible(true);
    ** Center the text
    class CenterRenderer extends DefaultTableCellRenderer
        public CenterRenderer()
            setHorizontalAlignment( CENTER );
        public Component getTableCellRendererComponent(
            JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
            super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            return this;

JTable cell background color

Hi All,
I want to change the background color of the same of the cells in jTabel. How can I do that.
Like, I want to keep 3 cells in red color. Another 2 cells in in green color, And keep other cell background color to default.
Also I want to change the background color of the cell, with different selection in other component(like jTree, jList).
Thank you,
Avin Patel

The same cell renderer is used by all cells of the table. You can't just set the background color of a cell once. You have to reset it every time the cell renderer is called (depending on which row/column you are being asked to render). Here is an example:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableCell extends JFrame
     JTable table;
     public TableCell()
          Object[][] data = { {"1", "A"}, {"2", "B"}, {"3", "C"}, {"4", "D"} };
          String[] columnNames = {"Number","Letter"};
          DefaultTableModel model = new DefaultTableModel(data, columnNames);
          table = new JTable( model );
          // Set default cell renderer
          TableCellRenderer renderer = new TestRenderer();
          table.setDefaultRenderer(Object.class, renderer);
          JScrollPane scrollPane = new JScrollPane( table );
          getContentPane().add( scrollPane );
     public static void main(String[] args)
          TableCell frame = new TableCell();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setVisible(true);
     class TestRenderer extends DefaultTableCellRenderer
          public Component getTableCellRendererComponent(
               JTable table,
               Object value,
               boolean isSelected,
               boolean hasFocus,
               int row,
               int column)
               super.getTableCellRendererComponent(table,
               value, isSelected, hasFocus, row, column);
               if (column == 0)
                    setHorizontalAlignment( LEFT );
                    setBackground( Color.blue );
               else
                    setHorizontalAlignment( RIGHT );
                    setBackground( Color.green );
               if (row == 1)
                    setBackground( Color.red );
               return this;
}

I failed to color JTable cells

Hello,
I'm trying to set the background color of JTable cells based on their content.
For example if I edit a cell and put a R, I'd like to paint the background in Red.
If I enter B, I want it becomes Blue, and so on.
I tried to use a few examples found in various fora, but all failed.
in addition, I do not understand why I should extend JLabel and not another Class ?
Thanks for help.
Here is a sample code (in which all cells should become red whatever is typed in).
import javax.swing.table.*;
import javax.swing.*;
public class TableRenderer extends JLabel implements javax.swing.table.TableCellRenderer {
public java.awt.Component getTableCellRendererComponent
    javax.swing.JTable table,
   Object value,
   boolean isSelected,
   boolean hasFocus,
   int row,
   int column
     setBackground(java.awt.Color.red);   // for the moment All cells will be red
     return this;
   mytable = new javax.swing.JTable(5,5);
   TableColumn[] column = new TableColumn[5];
   TableColumnModel colModel = mytable.getColumnModel();
   for (int i=0; i <5 ;i++)
                column[i] = colModel.getColumn( i );
                column.setCellRenderer(new TableRenderer());

Finally after many tries I found a good way to do what I wanted.
If some people are interested, here is the code.
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
class MyClass
public class TableRenderer extends javax.swing.table.DefaultTableCellRenderer
public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column)
     Component xx = super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
        String val = (String) table.getValueAt(row, column);
        if (gegeutil.Gegetools.isEmpty(val)) super.setBackground(Color.white);
        else if(val.equals("Tournament")) super.setBackground(Color.red);
          else if(val.equals("Class"))super.setBackground(Color.orange);
          else if(val == "")           super.setBackground(Color.white);
        else super.setBackground(Color.blue);
               return xx;
public TableRenderer() {
     super();
JTable table = new JTable(nbrow, nbcolumn);
table.setDefaultRenderer(Object.class, new TableRenderer());
}

JTable cell + isSelected, hasFocus, highlighted ??

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