Making some JTable cells nonfocusable
I have a JTable in which the TAB keys moves focus from cell to cell. Fine, but how can certain columns (or individual cells) be disabled from recieving focus ?? For "normal" JComponent-derived objects on a panel then I could call component.setFocusable(false); on the components I do not want to receive focus. What is the equivalent for a JTable cell given that it isn't a normal component: it is rendered via a TableRenderer ?
I suppose you are using JDK 1.4 beacuse I am using it now. :-)
I override the method: protected boolean accept(Component aComponent) {
} which is in the class LayoutFocusTraversalPolicy.
Similar Messages
-
How do I create a JTable with some empty cells in it?
I have a three column JTable. The first column is a String showing description. The second column contains numbers (double) and the third column also contains numbers. In some cases not all cells in a row should contain data. So for instance, I could have row one showing only description (a String in the first column), and then row two showing description (a String in the first column) and a number (a double in the second column) in columns one and two respectively. My problem is that, the data gets copied from the cells with data to the cells which are supposed to be empty. So, how do I create a JTable with some empty cells in it.
I have tried empty strings for those values, but it did not work. My table puts objects in an arraylist called reconciliation. The arraylist takes different objects with the same super class. The code below explains. Are you suggesting I pass null to my constructor?
JTable table = new JTable(new ReconTableModel());The method below is from the table model
protected List<Reconciliation> reconciliation = new ArrayList<Reconciliation>();
protected void fillModel(){
reconciliation.add(new CashBook("Cash Book Report"," "," "));
reconciliation.add(new CheckingBankAccount("Checking Bank Account"," "," "));
reconciliation.add(new BankBalance("Bank Balance As Per Bank Statement",500," "));
reconciliation.add(new PaymentVouchers("Payment Voucher Receipt",300," "));
reconciliation.add(new DepositVoucher("Deposit Voucher Receipt",1000," "));
reconciliation.add(new ReconciledBalance("Reconcilied Bank Balance",1200," "));
reconciliation.add(new BalanceAt("Bank Balance At",800," "));
reconciliation.add(new Difference("Difference",400," "));
Collections.sort( reconciliation, new Comparator<Reconciliation>(){
public int compare( Reconciliation a, Reconciliation b) {
return a.getTransactionName().compareTo( b.getTransactionName());
} -
JTable cell edits return to original values
Hi
I am making some progress with using AbstractTableModel, however I have a problem whereby any edits that I make to cells within the table are being lost when I add a new row��the original values are re-appearing.
I have searched through the forum looking for a solution but with no success thus far.
I believe that the solution lies with the fireTableDataChanged() method but thus far I have had no success. My problem (I believe) is that I cannot work out how to fire it when a user leaves the newly edited cell.
The method that adds the new rows is shown below and is called from a button on the Frame that houses the jTable. I have tried firing the method from here, hoping that all table edits will persist, but unfortunately they still disappear.
public void fillTable()
if(c > 0)
for (int i = 0; i < c; i = i + 1)
this.setValueAt(((JobItemClass) items.get(i)).getItemNumber(), i, 0);
this.setValueAt(((JobItemClass) items.get(i)).getDescription(), i, 1);
this.setValueAt(((JobItemClass) items.get(i)).getCostPerItem(), i, 2);
this.setValueAt(((JobItemClass) items.get(i)).getQuantity(), i, 3);
public void addRow()
newItem = new JobItemClass(); //Create an object to hold the new row defsault values
newItem.setItemNumber(c + 1);
newItem.setDescription("");
newItem.setCostPerItem(0.0);
newItem.setQuantity(0);
items.add(c, newItem); //Add the default object to the array
c = c + 1; //Update the variable holding the array size
table = new Object[c][4]; //Increase the size of the object that acts as the table
fireTableRowsInserted(c, c); //Alert the object acting as the table that there is a new row
fillTable(); //Refresh the display to reflect the new row default values
}As always, any help greatly appreciated
GBThanks again for the replies people.
I decided to edit this message and post updated code which can be seen below. This is a result of re-reading the helpfull advice from both azukov and camickr who took the time to respond to my initial request for help. I still have to work out how to validate user input but am sure that the tableChanged method will be the key.
A simple tutorial also provided great assistance, especially helping eith the implementation of the TableModelListener. I have provided a link to the tutorial here:
http://www.javalobby.org/articles/jtable/
The coding was carried out in netbeans 5.5, libraries have not been included.
Here is my updated code......table model first:
public class MyJobItemTableModel extends AbstractTableModel
JobItemClass newItem; //Procides a default record when nothing available
int jobNo;
int c;
ArrayList items; //Stores the objects that provide the records
public MyJobItemTableModel(int j)
jobNo = j;
items = (new JobAllItems(jobNo)).getItems();
c = items.size();
String columnName[] = { "Item Number", "Item Description", "Cost per item", "Quantity" };
Class columnType[] = { Integer.class, String.class, Double.class, Integer.class };
/**************************This method probably now redundant************************
public void storeCellValue(int row, int col)
if(col == 0)
((JobItemClass) items.get(row)).setItemNumber((Integer) this.getValueAt(row, col));
if(col == 1)
((JobItemClass) items.get(row)).setDescription((String) this.getValueAt(row, col));
if(col == 2)
((JobItemClass) items.get(row)).setCostPerItem((Double) this.getValueAt(row, col));
if(col == 3)
((JobItemClass) items.get(row)).setQuantity((Integer) this.getValueAt(row, col));
public void addRow()
c = c + 1; //Update the variable holding the array size
newItem = new JobItemClass(); //Create a default object to fill the new row
newItem.setItemNumber(c);
newItem.setDescription("");
newItem.setCostPerItem(0.0);
newItem.setQuantity(0);
items.add(c-1, newItem);
this.fireTableRowsInserted(c, c); //Update the display to show the added row.
public int getColumnCount()
return 4;
public int getRowCount()
return items.size();
public Object getValueAt(int r, int c)
JobItemClass jic = (JobItemClass) items.get(r);
switch(c)
case 0:
return jic.getItemNumber();
case 1:
return jic.getDescription();
case 2:
return jic.getCostPerItem();
case 3:
return jic.getQuantity();
default:
return new Object();
public String getColumnName(int column)
return columnName[column];
public Class getColumnClass(int c)
return columnType[c];
public boolean hasNoItems()
if(items.size() == 0)
return true;
else
return false;
public boolean isCellEditable(int r, int c)
return true;
public void setValueAt(Object aValue, int r, int c)
JobItemClass jic = (JobItemClass) items.get(r);
switch(c)
case 0:
jic.setItemNumber((Integer)aValue);
break;
case 1:
jic.setDescription((String)aValue);
break;
case 2:
jic.setCostPerItem((Double)aValue);
break;
case 3:
jic.setQuantity((Integer)aValue);
break;
fireTableCellUpdated(r, c);
}......and now the view (what the user sees)
public class ViewItems extends javax.swing.JPanel
protected MyJobItemTableModel myModel;
/** Creates new form ViewItems */
public ViewItems()
initComponents();
public void createTable(int jobNo)
myModel = new MyJobItemTableModel(jobNo);
myModel.addTableModelListener(new ViewItems.ViewItemsTableModelListener());
jTable1.setModel(myModel);
//jTable1.setSurrendersFocusOnKeystroke(true); //not sure what this does
if (myModel.hasNoItems())
myModel.addRow();
public void run(int jobNo)
createTable(jobNo);
try
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
JFrame frame = new JFrame("Invoice Breakdown");
frame.addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent evt)
setVisible(false);
frame.getContentPane().add(this);
frame.pack();
frame.setVisible(true);
catch (Exception e)
e.printStackTrace();
/**This class is required in order to respond to any changes that happen
* to the table or data within, i.e. the user editing data in a cell.
* The tablemodel (MyJobItemTableModel) will 'fire' the event and the
* tableChanged() method will be executed.
public class ViewItemsTableModelListener implements TableModelListener
public void tableChanged(TableModelEvent evt)
if (evt.getType() == TableModelEvent.UPDATE)
int column = evt.getColumn();
int row = evt.getFirstRow();
System.out.println("row: " + row + " column: " + column);
jTable1.setColumnSelectionInterval(column + 1, column + 1);
jTable1.setRowSelectionInterval(row, row);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents()
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
btnAddItem = new javax.swing.JButton();
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][]
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
new String []
"Title 1", "Title 2", "Title 3", "Title 4"
jScrollPane1.setViewportView(jTable1);
btnAddItem.setText("Add Item");
btnAddItem.addActionListener(new java.awt.event.ActionListener()
public void actionPerformed(java.awt.event.ActionEvent evt)
btnAddItemActionPerformed(evt);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 589, Short.MAX_VALUE)
.addContainerGap())
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(btnAddItem)
.add(264, 264, 264))))
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(49, 49, 49)
.add(btnAddItem)
.addContainerGap(54, Short.MAX_VALUE))
}// </editor-fold>
private void btnAddItemActionPerformed(java.awt.event.ActionEvent evt)
ViewItems.this.myModel.addRow();
// Variables declaration - do not modify
private javax.swing.JButton btnAddItem;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration
}Edited by: greenockboy on Oct 15, 2007 8:17 PM -
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 ..... -
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.
RuanaeThis 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);
} -
How to select rows in the inner JTable rendered in an outer JTable cell
I have wrriten the following code for creating cell specific renderer - JTable rendered in a cell of a JTable.
table=new JTable(data,columnNames)
public TableCellRenderer getCellRenderer(int row, int column)
if ((row == 0) && (column == 0))
return new ColorRenderer();
else if((row == 1) && (column == 0))
return new ColorRenderer1();
else
return super.getCellRenderer(row, column);
ColorRenderer and ColorRenderer1 are two inner classes, which implement TableCellRenderer to draw inner JTable on the outer JTable cell, having 2 rows and 1 column each.
Now what is happening the above code keeps executing continously, that is the classes are being initialised continously, inner JTables are rendered (drawn) continously, and this makes the application slow after some time. It throws java.lang.OutOfMemoryException.
WHY IS IT SO??? I can't understand where's the bug..
Any advice please???
Moreover i want selections in inner tables and not on outer table, how can this be possible.
I am working on this since a long time but have not yet found a way out...With your help i have overcome the problem of continous repeatition.
The major problem which I am facing is, in selecting rows in the inner rendered JTables.
I have added listener on outer JTable which select rows on the outer JTable, hence the complete inner JTable which being treated as a row, gets selected.
The thing is i need to select the rows of inner rendered JTables,not the outer JTable.
How to go about it??
I have even added listener to inner rendered JTables, but only first row of every table gets selected.
Please help....
Thanks in advance. -
How to display images in a Jtable cell-Urgent
Hay all,
Can anybody tell me that can we display images to JTable' cell,If yes the how do we do that(with some code snippet)? Its very urgent .Plz reply as soon as possible.Here is an example
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
class SimpleTableExample extends JFrame
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
public SimpleTableExample()
setTitle( "Table With Image" );
setSize( 300, 200 );
setBackground( Color.gray );
topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
getContentPane().add( topPanel );
// Create columns names
String columnNames[] = { "Col1", "Col2", "Col3" };
// Create some data
Object data[][] =
{ (ImageIcon) new ImageIcon("User.Gif"), (String) "100", (String)"101" },
{ (String)"102", (String)"103", (String)"104" },
{ (String)"105", (String)"106", (String)"107" },
{ (String)"108", (String)"109", (String)"110" },
// Create a new table instance
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable( model )
public Class getColumnClass(int column)
return getValueAt(0, column).getClass();
}; // Add the table to a scrolling pane
scrollPane = new JScrollPane( table );
topPanel.add( scrollPane, BorderLayout.CENTER );
public static void main( String args[] )
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible( true );
} -
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 {
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.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);
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;
renderer = new TextAreaCellRenderer(); // NEW
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");
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 MultiLineCellRenderer extends JTextArea implements TableCellRenderer {
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..
ThanksIn 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); -
Update JTable cells via setValueAt
Hello all,
I'm trying to implement a setValueAt method using an arrayList.....no success.What listeners should I have set up(For JTable or my table model)? I am new at this and I'm trying to update the JTable cells after a query from some db. Could anyone help?
When trying to change the a value in the table I get these errors:
"Exception occurred during event dispatching:
java.lang.ClassCastException: java.lang.String
at CachingResultSetTableModel.getValueAt(CachingResultSetTableModel.java:37)
at javax.swing.JTable.getValueAt(JTable.java:1711)
at javax.swing.JTable.prepareRenderer(JTable.java:3530)"
public void setValueAt(Object avalue, int r, int c){
if(r < cache.size()){
row[c] = (Object[])cache.set(r, avalue);
fireTableCellUpdated(r, c);
}//setValueAt
*********For reference here's the getValueAt method*************************
public Object getValueAt(int r, int c){
if(r < cache.size()){
row = (Object[])cache.get(r);
return row[c];
else
return null;
}//getValueAtI would think that everone who starts off with JTable will have a couple of concept problems. I am also going thru this learnig curve. It looks to me ( the blind leading the blind etc) like your basic table has strange data in it. The problem is occuring when the JTable is trying to setup the data from the table model.
I don't think its anything to do with setValueAt.
I kept going back to TableMap, TableSorter and JDBCAdaptor examples and copying the code from them to come right.> I debug by putting a System.out .... in all the methods until I get to where the code is giving trouble.
Good luck [email protected]
Hello all,
>
I'm trying to implement a setValueAt method using an
arrayList.....no success.What listeners should I have
set up(For JTable or my table model)? I am new at
this and I'm trying to update the JTable cells after a
query from some db. Could anyone help?
When trying to change the a value in the table I get
these errors:
"Exception occurred during event dispatching:
java.lang.ClassCastException: java.lang.String
at
CachingResultSetTableModel.getValueAt(CachingResultSetT
bIleModel.java:37)
at javax.swing.JTable.getValueAt(JTable.java:1711)
at
javax.swing.JTable.prepareRenderer(JTable.java:3530)"
public void setValueAt(Object avalue, int r, int c){
if(r < cache.size()){
row[c] = (Object[])cache.set(r, avalue);
fireTableCellUpdated(r, c);
}//setValueAt
*********For reference here's the getValueAt
method*************************
public Object getValueAt(int r, int c){
if(r < cache.size()){
row = (Object[])cache.get(r);
return row[c];
else
return null;
}//getValueAt -
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.
-
MouseListener for JTable cells using html
Hello,
I'm trying to write a MouseListener that determines whether the cursor is positioned over a certain string within a JTable cell. The cell contains an html string to allow for some formatting.
For instance, the table data for a certain cell could be "<html><b>SomeBoldText</b>moreText<html>". I would like to detect when a mouse click occurs on the bold text.
My current solution is to create the glyph vector corresponding to the cell content stripped of all html tags and then check if the cursor position is within one of the glyphs that form the string. However, that obviously doesn't take into account the formatting done by html, so its not working very well.
Any suggestions?the only way you could possibly do this, if you used JEditorPane as a renderer. even then i'm not sure.
-
Can JTable cell acts as JList?
I was planning to create an Event Calendar view in Monthly. Currently my jTable cell extends JTextArea. My problem is that, for example, today I got 2 events display in one cell, when a user double-click the "today" cell, an edit form will pop out, if there are 2 events in one cell, how I know which events to be edit? In this case I was thinking to use JList instaed of jTextArea. so i can choose which event to be edit. Is there any example showing how to implement jTable with jList cell? or is there any other method to overcome it?
I haven't used a JList in a JTable so far, but for a JComboBox you find a working example in the tutorial. That may give you some ideas.
What I did use is a (read only) JTable in a JTable. So if you don't achieve your goal with JList there are alternatives.
But wait for our table specialists to come along. -
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> -
Start or stop edit jtable cell editing
Hello,
I got a problem with the jtable DefaultModel isCellEditable.
If I set the IsCellEditable to false, I would not be able to enable the cell selection as and when I want it.
What I have in mind is the add a mouselister so that if the user select a row using fast left mouse click like the procedure shown below
private class MouseClickHandler extends MouseAdapter {
public void mouseClicked(MouseEvent event) {
int no_mouseclick = 0;
no_mouseclick = event.getClickCount();
if (no_mouseclick >= 2) {
int cur_row = 0;
cur_row = table.getSelectedRow();
// table.setColumnSelectionAllowed(true);
// table.setRowSelectionAllowed(true);
for (int i=0;i<table.getColumnCount();i++){
table.editCellAt(cur_row,i);
System.out.println("mouse row--->" + cur_row);
I could overwrite the IsCellEditable to true to enable that particular or cell contains in that row to be able to accept input and overwrite any data which in my case obtained from the Sql database a sort of like input module using tabulation . I am also thinking of using text component or combobox to display the value for user selection , but I do not know how to enable a particular cell for editing if the Jtable created is using a non-editable DefaultModel. If I set the IsCellEditable to true, every single cell would be enable for editing , and this defeat the purpose of enable user input only upon double mouseclicks.
By the way , I am interested to know how to track the data changes in the cell within the jtable so that only those have been modified are notify from the Table model and updated into the Sql table
Could anyone of you out there provide some hints please
ThanksHello,
Tablemodellistener could detect the changes in the data, how about the backend database updating and transactional activity that must be associated with the data changes?
What is on my mind is that , the moment there is changes in the data detected by the TableModellistener, whatever records associated with or brougt up by Jtable would be all deleted from the database and then follow by the new set of new records to be inserted into the database. The disadvantage of this method is that everytime the backend database connection and activity need to be executed the moment there is a change in the data in the jtable cell. For example the user may be just amendment to only one cell , but all the records associated need to be deleted and then inserted again.
Perhaps there are better solution to deal with Jtable and JDBC backend connection where in this case, I am using JDO to undertake the database activity like the observable modelling .
Could someone provide the hint please
Thank -
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());
}
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