Help : JTable
Hi,
I have a JTable which populates with list of categories.
Upon the click of any category another jtable will get populated with description of that category.
This works fine if i'm not sorting by clicking on the column header.
If i sort them using the column header then my first table will get sorted with categories.
But if i click on the category ,the other table(table 2) will not get populated relevant to the category clicked.
But it still displays the same content when the first table wasnt sorted.
Actions are taking place but not relevant.
Can anyone help me out with this problem.
Thanks in advance.
I'm using JXTable from JDeskTop.
I'm not using tablesorter explicitly.
I'm gonna explain in detail.
I have 3 tables say table1,table2,table3.
Each depend on the previous tables,and table1 is populated onLoad.
For table 1 i'm using sql query which selects only one column from database.
For table2 sql qruery selects 5 columns.
table3 will display the threads of table2.
I'm using the tableModel which extends AbstractTableModel which extends DefaultModel.
the table Model for table2 has 5 columns,but table displays only 2 of them hiding other 3,where id is one of the column.
So my doubt is when i sort the column on table ,may not sort the columns which are hidden.the table3 will pick up the id of row clicked and display the contents.The id column remains same even though i'm sorting other column on table2.And this is what happenning for sure.i checked it .
But why the same thing is happenning with table1 also.bcoz it just has 1 column.But still the same problem exists.
Any kind of help will be appreciated.
TIA.
Similar Messages
-
Please Help.JTable insert styled text
Hi all java guru,
on post http://forum.java.sun.com/thread.jsp?forum=57&thread=485469 i've depicted my scenario in which i have a JTable where i want to add styled text.
i've implemented a CustomTableModel that maintains information about text style, in such way that when renderer cell, i can rebuild exact text with its style....same method is adopted for CellEditor.
It is possible to have more than one JTable in my application....then to correctly handle all JTables ' put them in a vector and during editing and rendering i find current focusable/selected JTable and edit/render it.
Clearly i maintain information about style of text when i insert it, that is when i insert text, i update my CustomTableModel...same thing must be done when i delete text from JTable...that is, i must update CustomTableModel too in this case.
Because my CellEditor is a JEditorPane component (extend it) i've registered document associated to it to a DocumentListener that notify every time that a remove operation is happens.
What is the problem now???problem is that when i finish to edit a cell and click on another cell i've got a removeUpdate(DocumenEvent e) event, and i can't distinguish it.....it seems a real remove event....
In this case(when i change cell) the code that is executes returns wrong result and invalidate all the rest.
I think error is where i register celleditor , now i do it in CustomCellRenderer class that extend JEditorPane and implements TableCellRenderer.
Please help me...this is a great trouble that invalidate all my work :(
Any new idea is welcome.
regards,
anti-shockHi stanislav, of course i can...you're a myth :)
public class CustomCellEditor extends AbstractCellEditor implements TableCellEditor {
CellEditor cellArea;
JTable table;
public CustomCellEditor(JTable ta) {
super();
table = ta;
// this component relies on having this renderer for the String class
MultiLineCellRenderer renderer = new MultiLineCellRenderer();
table.setDefaultRenderer(String.class,renderer);
public Object getCellEditorValue() {
return cellArea.getText();
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
int start = 0;
int end = 0;
// Get current selected table
TableEditor tb = (TableEditor) TableEditor.getSelectedTable();
TableModel model = (TableModel) tb.getModel();
Vector fontInfo = model.getFontFor(row,column);
CellEditor cellArea = (CellEditor) ((CustomCellEditor)tb.getCellEditor (row,column)).getCellEditor();
Document doc = cellArea.getDocument();
String content = tb.getValueAt(row,column).toString();
if (doc!=null && fontInfo.size()>0 && !content.equals("")) {
// This method reads from model and get right style info
// for current text, and restore them
restoreFontWithAttributes(doc,fontInfo,content);
else
cellArea.setText(tb.getValueAt(row,column).toString());
cellArea.rowEditing = row;
cellArea.columnEditing = column;
cellArea.lastPreferredHeight = cellArea.getPreferredSize().height;
return cellArea;
* @return
public CellEditor getCellEditor() {
return cellArea;
public class CellEditor extends JEditorPane {
private CellStyledEditorKit k;
public CellEditor() {
super("text/plain","");
k = new CellStyledEditorKit();
setEditorKit(k);
// I tried to add document here, but i have had wrong behavior
doc = new DocumentListener() {
public void removeUpdate(DocumentEvent e) {
// Get current selected table
TableEditor tb = (TableEditor) TableEditor.getSelectedTable();
TableModel model = (TableModel) tb.getModel();
model.updateFontInfo();
getDocument().addDocumentListener(doc);
}Ok, stan...this is my CustomCellRenderer class....as i have already said, i have some style text info mainteined by CustomTableModel associated with JTable.
I update CustomTableModel every time that an insert and remove operation happens.
If i add a DocumentListener to CellEditor (that rapresents editor cell of my table) happens that, if i remove some character from an editing cell, i got a removeUpdate event.....and this is right!!! But if i change cell (e.g. supposing editing cell(1,1), click on cell(2,1) then stop edit cell(1,1) and start edit cell(2,1)) i got a removeUpdate event, that I don't wait for to me..
Look at this:
empty cell | some text
cell 0 ------- cell1
supposing you're in cell1 and you have finished to insert "some text".Then click on cell0, that is empty....then document associated with CellArea(extend JEditorPane) before of the click on cell0 had some text, but after click have no text, then for it a removeUpdate is happens.....and is that one i got..
it's as if an unique document is associated to all cells, while should be one document for each cell (i hope this is right).
Clearly, i've same code for renderer, in such way that i can restore style of text on rendering.
Hope is clear....if U have any idea or suggestion please give to me.
Tnx a lot Stanislav..
regards,
anti-shock -
Please help - Jtable sorting columns
Hi friends...
I have a JTable whith many different kinds of columns... When I click on a column, it sorts all the table according to the clicked column. How can I make that only the order of THAT column to be reversed (ascending/descending)?Visually, it should only sort the table righthand of the clicked column...
Any ideas?
ThanX for your help...Hi
Please find some handy information on JTable and other swing examples.
http://www2.gol.com/users/tame/swing/examples/SwingExamples.html
Hope this helps
Swaraj -
Pls Help :JTable Double Value Editing Problem
hi friends
as i am new to swings and Jtable pls help me if u can.
in the code copied below when i start putting value into the Double column of JTable
a ( .0 ) is appended at the end which is undesirable it should be like that only when the value is
something like 22.99 and also i want to limit the double value's fractional part to be limited to 2 digits only.
if this can be done in my Table model itself so that it will work everywhere i use this model
Pls tell me what exactly do i need, a custom Cell Editor or Cell Renderer. and whether can i do it in the
Table Model Defination class or whether i can only do it on the Jtable only.
guys its so confusing.pls help
if anyone can send a sample code for achieving this it would be of great help
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.text.*;
public class TableProcessing extends JFrame implements TableModelListener
JTable table;
public TableProcessing()
String[] columnNames = {"Item", "Quantity", "Price", "Cost"};
Object[][] data =
{"Bread", new Integer(1), new Double(1.11), new Double(1.11)},
{"Milk", new Integer(1), new Double(2.22), new Double(2.22)},
{"Tea", new Integer(1), new Double(3.33), new Double(3.33)},
{"Cofee", new Integer(1), new Double(4.44), new Double(4.44)}
DefaultTableModel model = new DefaultTableModel(data, columnNames);
model.addTableModelListener( this );
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();
// The Cost is not editable
public boolean isCellEditable(int row, int column)
if (column == 3)
return false;
else
return true;
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
* The cost is recalculated whenever the quantity or price is changed
public void tableChanged(TableModelEvent e)
if (e.getType() == TableModelEvent.UPDATE)
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 1 || column == 2)
int quantity = ((Integer)table.getValueAt(row, 1)).intValue();
double price = ((Double)table.getValueAt(row, 2)).doubleValue();
Double value = new Double(quantity * price);
table.setValueAt(value, row, 3);
public static void main(String[] args)
TableProcessing frame = new TableProcessing();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}thank in advance
jagsNo.
But further to this try:
public class MyCustomRenderer extends javax.swing.table.DefaultTableCellRenderer
private java.text.DecimalFormat FORMAT_DOUBLE;
public MyCustomRenderer()
FORMAT_DOUBLE = new java.text.DecimalFormat("#, ##0.00");
public java.awt.Component getTableCellRendererComponent(javax.swing.JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
//NB! you could also set foreground/background here to indicate positive/negative values...
if(value.getClass().equals(Double.class))//is this a double?
double d = ((Double)value).doubleValue();
d = (Double.isNaN(d)||Double.isInfinity(d))?0:d;
this.setText(FORMAT_DOUBLE.format(d));
else//not a double so let's toString() it...
this.setText(""+value);
}then, using code pasted above, specify a new instance of this class as the default renderer in your
table.....
:) -
PLEASE HELP-JTable cell editor-change one cell, changes all cells of column
for example i have 3 rows 4 columns, column 3 and 4 are dates. now if i change the date to a new value (eg for of column 3)
for any row, and then i click on any other cell. All cell values ie all rows for that column are changed to that new value.
ie it changed column 3 for all rows 1, 2 and 3 to that new value which i changed in only one cell of that column.
PLEASE HELP me , tell me what change i make to the code to fix it ....
this is my cell renderer for date
class DateCellRenderer extends JbcDateTimeChooser implements TableCellRenderer {
protected Border m_noFocusBorder;
public DateCellRenderer() {
super();
setStylePattern(JbcDateTimeChooser.MEDIUM);
m_noFocusBorder = new EmptyBorder(1, 2, 1, 2);
setOpaque(true);
setBorder(m_noFocusBorder);
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column)
if(value instanceof Date) {
Date b = (Date)value;
setDate(b);
setFont(table.getFont());
setBorder(hasFocus ? UIManager.getBorder(
"Table.focusCellHighlightBorder") : m_noFocusBorder);
return this;
}I have this custom cell editor date
class DateCellEditor extends AbstractCellEditor implements TableCellEditor {
protected JbcDateTimeChooser editor;
public DateCellEditor() {
super();
editor = new JbcDateTimeChooser();
editor.setStylePattern(JbcDateTimeChooser.MEDIUM);
public Object getCellEditorValue() {
return editor.getDate();
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column)
if(value instanceof Date) {
editor.setDate((Date)value);
return editor;
}and this is how i defined in jtable
lnnTableModel = new CellSiteLNNTableModel();
lnnTable.setModel(lnnTableModel);
lnnTableModel.addColumn("ABC");
lnnTableModel.addColumn("DEF");
lnnTableModel.addColumn("Date From");
lnnTableModel.addColumn("Date To");
for(int k = 0; k < lnnTableModel.getColumnCount(); k++) {
TableColumn col = lnnTable.getColumn(lnnTableModel.getColumnName(k));
TableCellRenderer renderer;
DefaultTableCellRenderer textRenderer = new DefaultTableCellRenderer();
renderer = textRenderer;
TableCellEditor editor;
JTextField textColumn = new JTextField();
if((k == CellSiteLNN.DATE_FROM) || (k == CellSiteLNN.DATE_TO)) {
editor = new DateCellEditor(); // this is the cell editor
renderer = new DateCellRenderer(); // this is the assigned cell renderer
} else {
editor = new DefaultCellEditor(textColumn);
col.setCellRenderer(renderer);
col.setCellEditor(editor);
}table model is extended from AbstractTableModel
and have these methods
do you see anything wrong here.....
public Object getValueAt(int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
return rowVector.elementAt(column);
public void setValueAt(Object aValue, int row, int column) {
Vector rowVector = (Vector)dataVector.elementAt(row);
rowVector.setElementAt(aValue, column);
// generate notification
fireTableChanged(new TableModelEvent(this, row, row, column));
} // end method (setValueAt) -
Need Help: JTable POP up menu in a CellEditor to display on a right click
This was from a previous post:
I am trying to make a POP menu in a JTextComponent that has a assigned JEditorPane for a HTMLDocument to make use of the HTMLEditorKit to allow modifying HTML by the POP up menu.
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import javax.swing.text.html.*;
import javax.swing.undo.*;
import javax.swing.border.*;
import javax.swing.filechooser.*;
public class SimpleTableDemo extends JFrame {
public SimpleTableDemo() throws Exception {
final JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
TableColumn fileColumn = table.getColumnModel().getColumn(2);
FileTableCellEditor editor = new FileTableCellEditor();
fileColumn.setCellRenderer(editor);
fileColumn.setCellEditor(editor);
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane, BorderLayout.CENTER);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
table.setRowHeight(100);
public static void main(String[] args) throws Exception {
SimpleTableDemo frame = new SimpleTableDemo();
frame.pack();
frame.setVisible(true);
class MyTableModel extends AbstractTableModel {
String[] columnNames = {"First Name","Last Name","HTML File"};
public Object[][] data;
MyTableModel() throws Exception
data = createArray();
private Object[][] createArray() throws Exception
Object[][] data = {{"One", "Andrews", createDoc("file1.html")}
return data;
private Document createDoc(String url) throws Exception
File file = new File(url);
URL baseURL = file.toURL();
InputStream in = baseURL.openStream();
InputStreamReader r = new InputStreamReader(filterTag(in));
HTMLEditorKit kit = new HTMLEditorKit();
Document doc = kit.createDefaultDocument();
kit.read(r,doc,0);
return doc;
} // workaround for HTMLEditorKit.Parser, cant deal with "content-encoding"
private InputStream filterTag(InputStream in) throws IOException {
DataInputStream dins = new DataInputStream( in);
ByteArrayOutputStream bos = new ByteArrayOutputStream(10000);
DataInputStream din = new DataInputStream(new BufferedInputStream(in));
while (din.available() > 0) {
String line = din.readLine();
String lline = line.toLowerCase();
if (0 <= lline.indexOf("<meta ")) // skip meta tags
continue;
bos.write( line.getBytes());
din.close();
return new ByteArrayInputStream( bos.toByteArray());
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();
public boolean isCellEditable(int row, int col) {
if (col >< 1) {
return false;
} else {
return true;
public class FileTableCellEditor extends JScrollPane implements TableCellEditor , TableCellRenderer
public JTextComponent jtext;
JEditorPane editor;
HTMLEditorKit kit = new HTMLEditorKit();
HTMLDocument doc = new HTMLDocument();;
private EventListenerList listenerList = new EventListenerList();
private ChangeEvent event = new ChangeEvent(this);
public FileTableCellEditor()
editor = new JEditorPane();
editor.setContentType("text/html");
doc=new HTMLDocument();
editor.addMouseListener(new MouseHandler());
editor.setEditorKit(kit);
editor.setDocument(doc);
editor.setEditable(true);
editor.setCaretColor(Color.RED);
getViewport().setView(editor);
setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
// System.out.println("has focus: "+hasFocus+", isSelected: "+isSelected);
if (isSelected)
table.editCellAt(row,column);
table.editCellAt(row,column);
return getTableCellEditorComponent(table,value,isSelected, row, column);
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column)
editor.setDocument((Document)value);
return this;
public boolean isCellEditable(EventObject anEvent)
{ return true;
public boolean shouldSelectCell(EventObject anEvent)
{ return true;
public void cancelCellEditing()
{ fireEditingStopped();
public boolean stopCellEditing()
{ return true;
public Object getCellEditorValue()
{ return null;
public void addCellEditorListener(CellEditorListener l)
{ 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);
///////////createPopupMenu///////////////
protected JPopupMenu createPopupMenu()
JPopupMenu popup =new JPopupMenu();
popup.add(getTextComponent().getActionMap().get(HTMLEditorKit.cutAction)).setAccelerator(null);
popup.add(getTextComponent().getActionMap().get(HTMLEditorKit.copyAction)).setAccelerator(null);
popup.add(getTextComponent().getActionMap().get(HTMLEditorKit.pasteAction)).setAccelerator(null);
popup.addSeparator();
popup.add(getTextComponent().getActionMap().get("font-bold"));
popup.add(getTextComponent().getActionMap().get("font-italic"));
popup.add(getTextComponent().getActionMap().get("font-underline"));
//popup.add(getTextComponent().getActionMap().get("break"));
return popup;
public JTextComponent getTextComponent()
return jtext;
protected class MouseHandler extends MouseAdapter{
public void mouseReleased(MouseEvent me){
if(me.getButton()==MouseEvent.BUTTON3){
Point p=me.getPoint();
createPopupMenu().show((Component)me.getSource(),p.x,p.y);
}I got the pop up to work, I had to go back to and add a createActionTable editor that is a JEditorPane, vs the JTextComponent!
Here is the latest version:
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.HashMap;
import javax.swing.*;
import javax.swing.undo.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import javax.swing.text.html.*;
import javax.swing.undo.*;
import javax.swing.border.*;
import javax.swing.filechooser.*;
public class SimpleTableDemo extends JFrame {
public SimpleTableDemo() throws Exception {
final JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
TableColumn fileColumn = table.getColumnModel().getColumn(2);
FileTableCellEditor editor = new FileTableCellEditor();
fileColumn.setCellRenderer(editor);
fileColumn.setCellEditor(editor);
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane, BorderLayout.CENTER);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
table.setRowHeight(100);
public static void main(String[] args) throws Exception {
SimpleTableDemo frame = new SimpleTableDemo();
frame.pack();
frame.setVisible(true);
class MyTableModel extends AbstractTableModel {
String[] columnNames = {"First Name","Last Name","HTML File"};
public Object[][] data;
MyTableModel() throws Exception
data = createArray();
private Object[][] createArray() throws Exception
Object[][] data = {{"One", "Andrews", createDoc("file1.html")}
return data;
private Document createDoc(String url) throws Exception
File file = new File(url);
URL baseURL = file.toURL();
InputStream in = baseURL.openStream();
InputStreamReader r = new InputStreamReader(filterTag(in));
HTMLEditorKit kit = new HTMLEditorKit();
Document doc = kit.createDefaultDocument();
kit.read(r,doc,0);
return doc;
} // workaround for HTMLEditorKit.Parser, cant deal with "content-encoding"
private InputStream filterTag(InputStream in) throws IOException {
DataInputStream dins = new DataInputStream( in);
ByteArrayOutputStream bos = new ByteArrayOutputStream(10000);
DataInputStream din = new DataInputStream(new BufferedInputStream(in));
while (din.available() > 0) {
String line = din.readLine();
String lline = line.toLowerCase();
if (0 <= lline.indexOf("<meta ")) // skip meta tags
continue;
bos.write( line.getBytes());
din.close();
return new ByteArrayInputStream( bos.toByteArray());
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();
public boolean isCellEditable(int row, int col) {
if (col < 1) {
return false;
} else {
return true;
public class FileTableCellEditor extends JScrollPane implements TableCellEditor , TableCellRenderer
JEditorPane editor = new JEditorPane();
HTMLEditorKit kit = new HTMLEditorKit();
HTMLDocument doc = new HTMLDocument();;
private EventListenerList listenerList = new EventListenerList();
private ChangeEvent event = new ChangeEvent(this);
HashMap<Object, Action> actions;
public FileTableCellEditor()
getContentPane();
editor.setContentType("text/html");
doc=new HTMLDocument();
editor.addMouseListener(new MouseHandler());
editor.setEditorKit(kit);
editor.setDocument(doc);
editor.setEditable(true);
editor.setCaretColor(Color.RED);
getViewport().setView(editor);
createActionTable(editor);
makeActionsPretty();
setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
public void makeActionsPretty(){
Action a;
a=editor.getActionMap().get(HTMLEditorKit.cutAction);
a.putValue(Action.SHORT_DESCRIPTION,"Cut");
a.putValue(Action.ACCELERATOR_KEY,KeyStroke.getKeyStroke('X',Event.CTRL_MASK));
a=editor.getActionMap().get(HTMLEditorKit.copyAction);
a.putValue(Action.NAME,"Copy");
a.putValue(Action.SHORT_DESCRIPTION,"Copy");
a.putValue(Action.ACCELERATOR_KEY,KeyStroke.getKeyStroke('C',Event.CTRL_MASK));
a=editor.getActionMap().get(HTMLEditorKit.pasteAction);
a.putValue(Action.NAME,"Paste");
a.putValue(Action.SHORT_DESCRIPTION,"Paste");
a.putValue(Action.ACCELERATOR_KEY,KeyStroke.getKeyStroke('V',Event.CTRL_MASK));
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
if (isSelected)
table.editCellAt(row,column);
table.editCellAt(row,column);
return getTableCellEditorComponent(table,value,isSelected, row, column);
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column)
editor.setDocument((Document)value);
return this;
public boolean isCellEditable(EventObject anEvent)
{ return true;
public boolean shouldSelectCell(EventObject anEvent)
{ return true;
public void cancelCellEditing()
{ fireEditingStopped();
public boolean stopCellEditing()
{ return true;
public Object getCellEditorValue()
{ return null;
public void addCellEditorListener(CellEditorListener l)
{ 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 JPopupMenu createPopupMenu()
JPopupMenu popup =new JPopupMenu();
popup.add(getActionByName(DefaultEditorKit.cutAction));
return popup;
protected class MouseHandler extends MouseAdapter{
public void mouseReleased(MouseEvent me){
if(me.getButton()==MouseEvent.BUTTON3){
Point p=me.getPoint();
createPopupMenu().show((Component)me.getSource(),p.x,p.y);
private void createActionTable(JTextComponent textComponent) {
actions = new HashMap<Object, Action>();
Action[] actionsArray = textComponent.getActions();
for (int i = 0; i < actionsArray.length; i++) {
Action a = actionsArray;
actions.put(a.getValue(Action.NAME), a);
private Action getActionByName(String name) {
return actions.get(name); -
Swing GUI help, JTable up/down button...
My guess is this is really simple but I'm very new to Java and can't seem to figure it out. Basically I have a small JTable that is 3-5 rows and I'd like to add two buttons (up and down) outside of the table that when clicked will change the highlighted row in the JTable. I have the GUI all setup and created and the JTable is populated with data, I just don't know how to make the buttons do what I want them to do. I've found the info on JTable "pages" but I don't think that's what I want.
Any suggestions or tips?Or ask this question over in the active swing area of these forums, just a guess but I think you will get a better answer faster by asking in the right place. What you are doing is sort of like asking a bunch of Trekkies a question about Boston Legal, sure one or two of them might know due to the Shatner link and all, but you would probably be better served asking the Boston Legal convention going on right next door.
JSG
PS I am not a trekkie, never have been, and could be completely wrong about what trekkies know about boston legal. -
How to find Specifiq header column in JTable
sir
i use the following
table.getTableHeader().setBackground(Color.red);
but i want to change the color of specfiq column
how can i do
thanksI have not tried this but hopefully this helps
JTable e;
e.getColumnModel().getColumn(chooseAcolumn).setHeaderRenderer(YourRenderer);
public class YourRenderer extends DefaultTableCellRenderer implements TableCellRenderer
public java.awt.Component getTableCellRendererComponent(javax.swing.JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column)
//Do what you want....
this.setText((obj==null)?"":obj.toString());
this.setBackgroundColor(Color.red);
return this;
I haven't tested this hopefully this gives you a direction.. -
Help with JTable - content of cell disappears when selected
Hello,
I have a jTable and I have created a custom cell renderer. It does what it's supposed to do (which is set the background color of all cells with null or "" value to red - as an indication to the user that b4 proceeding he/she has to fill in this cells). The problem is that when I select a red cell, it becomes white and the text value it contains disappears. When I double click I can start typing in a new value.
I would appreciate any hint why this happens? Ideally I would like the cell to keep its color when clicked or double-clicked and its value, and only when i'm done editing its content and it's not null or empty string to become white.
I'm including majority of my code (some automatically generated code from Netbeans is not included).
Thank you very much,
Laura
public class DataNormalisation extends javax.swing.JFrame {
JTextArea txt=new JTextArea();
public Object[][] DataSummary;
public Vector<String> colName;
MainF p;
String[] ExpNames;
/** Creates new form DataNormalisation */
public DataNormalisation(String[] EN, MainF parent) {
p=parent;
ExpNames=EN;
colName= new Vector<String>();
colName.add("Sample Name");
colName.add("Replicate Group");
DataSummary=new Object[ExpNames.length][2];
for (int i=0;i<ExpNames.length;i++){
DataSummary[0]=ExpNames[i];
initComponents();
this.jTable1.getTableHeader().setReorderingAllowed(false);
TableColumn column = jTable1.getColumnModel().getColumn(1);
column.setCellRenderer(new CustomTableCellRenderer());
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new JTable (new DataModel());
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setTitle("Data Normalisation");
jTable1.setAutoCreateRowSorter(true);
jTable1.setCellSelectionEnabled(true);
jScrollPane1.setViewportView(jTable1);
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration
class DataModel extends AbstractTableModel {
class TML implements TableModelListener{
public void tableChanged (TableModelEvent e){
txt.setText(""); // Clear it
for (int i=0;i<DataSummary.length; i++){
for (int j=0; j<DataSummary[0].length;j++){
txt.append(DataSummary[i][j] + " ");
txt.append("\n");
public DataModel(){
addTableModelListener(new TML());
@Override
public void setValueAt(Object val, int row, int col){
DataSummary[row][col]=val;
fireTableDataChanged();
@Override
public boolean isCellEditable(int row, int col){
return (col != 0);
public int getRowCount(){
return DataSummary.length;
public int getColumnCount(){
return colName.size();
public Object getValueAt(int row, int column){
return DataSummary[row][column];
public String getColumnName(int col) {
return colName.get(col);
class CustomTableCellRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (value == null || value.equals("")) {
cell.setBackground(Color.red);
} else cell.setBackground(Color.white);
return cell;Ideally I would like the cell to keep its color when clicked or double-clicked Not sure why is changes color when you click on the cell.
But when you double click the editor is invoked, which is a JTextField and its background is white by default.
The code you posted doesn't help because its not executable.
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
And don't post NetBeans generated code, because we don't use IDE to write GUI code.
Also, why did you create a custom TableModel. The DefaultTableModel will store your data for you. -
Can You Help Me ABout getSelectedRow in JTable
Can you help me on how to solve my problem about the getSelectedRow .....
I have one JComboBox and a SearchButton
... Once I selected an Item in a JComboBox, I will press the SearchButton
and then it will look up to the database and display it in the JTable..........
i used the getSelectedRow to print the value that I selected in the table...
like this...
public void mouseClicked(MouseEvent e) {
// Ilabas yung form
if(e.getClickCount() == 1 ) {
System.out.println(table1.getSelectedRow());
In the first press in the SearchButton and then clicking the row
, It will print the selected row...... but when i press again the SearchButton then clicking a row again........
there is a problem occured....... selectedRow is always -1, can you help me to solve this.....import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
import java.util.*;
import javax.swing.plaf.metal.*;
import javax.swing.border.*;
import javax.swing.table.*;
import java.text.*;
import java.beans.*;
public class OpenProject extends JDialog {
ResultSet rs, rs1, rs2, rs3;
JFrame JFParentFrame; // create a JFrame
JFrame OwnerFrame; // create a JFrame
public JLabel proj_name;
public JLabel proj = new JLabel("Project Name:");
public JLabel form = new JLabel("Form Name");
public JLabel lang = new JLabel("Language");
public JComboBox form_lang = new JComboBox();
public JComboBox form_name = new JComboBox();
public JButton edit = new JButton("Edit");
public JButton reload = new JButton("Search");
public JButton def = new JButton("Set Text Default");
public JButton langs = new JButton("Add Language");
public JButton exit = new JButton("Exit");
public JPanel panel1 = new JPanel ();
public JTable table1, table2, table3,table4;
public JScrollPane scrollPane1, scrollPane2, scrollPane3, scrollPane4;
public JTabbedPane UITab,UITab1;
Container c = getContentPane();
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
public String column[][];
public String strRow;
public String strCol;
public String strForm;
public String strGetProj_id;
public String strForm_lang;
public String strForm_name;
private boolean DEBUG = false;
public int getLang;
public int getForm;
public int getDef_id;
public int count2 = 0,count3 = 0,count4 = 0;
public int row2 = 0,row3 = 0,row4 = 0;
public int selectedRow1 = 0, selectedRow2 = 0;
public DbBean db = new DbBean();
public OpenProject(JFrame OwnerForm, String getProj_id) {
super(OwnerForm,true);
strGetProj_id = getProj_id;
try{
db.connect();
} catch(SQLException sqlex) {
} catch(ClassNotFoundException cnfex) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(Exception e) {
// Para ito sa paglalagay sa dalawang combo box ng value.......
try {
rs = db.execSQL("Select * from mst_form where form_proj_id = "+strGetProj_id+"");
while(rs.next()) {
form_name.addItem(rs.getString("form_name"));
//System.out.println(strForm);
} catch(SQLException sqlex) {
try {
rs = db.execSQL("Select distinct from mst_form where form_proj_id = "+strGetProj_id+"");
while(rs.next()) {
form_name.addItem(rs.getString("form_name"));
//System.out.println(strForm);
} catch(SQLException sqlex) {
try {
int counts;
rs = db.execSQL("Select * from mst_project where proj_id = "+strGetProj_id+"");
while(rs.next()) {
counts = rs.getInt("proj_lang_id");
System.out.println(counts);
rs1 = db.execSQL("Select * from mst_language where lang_id = "+counts+"");
while (rs1.next()) {
form_lang.addItem(rs1.getString("lang_name"));
} catch(SQLException sqlex) {
edit.setActionCommand("edit");
edit.addActionListener(actions);
reload.setActionCommand("load");
reload.addActionListener(actions);
def.setActionCommand("default");
def.addActionListener(actions);
langs.setActionCommand("lang");
langs.addActionListener(actions);
exit.setActionCommand("exit");
exit.addActionListener(actions);
proj_name = new JLabel();
proj_name.setBackground(new Color(255,255,255));
form_name.setMaximumRowCount(5);
form_name.setBackground(new Color(255,255,255));
form_lang.setMaximumRowCount(5);
form_lang.setBackground(new Color(255,255,255));
proj.setBounds(20, 20,100,20);
proj_name.setBounds(120, 20,250,20);
form.setBounds(20, 50,100,20);
form_name.setBounds(120, 50,150,20);
lang.setBounds(300, 50,100,20);
form_lang.setBounds(380, 50,150,20);
reload.setBounds(560,50,80, 20);
edit.setBounds(110,360,115,20);
def.setBounds(230,360,115,20);
langs.setBounds(350,360,115,20);
exit.setBounds(470,360,115,20);
panel1.add(getTable());
panel1.setLayout(null);
panel1.setBackground(Color.white);
panel1.add(proj);
panel1.add(proj_name);
panel1.add(form);
panel1.add(form_name);
panel1.add(lang);
panel1.add(form_lang);
panel1.add(reload);
panel1.add(def);
panel1.add(langs);
panel1.add(exit);
panel1.add(edit);
c.add(panel1);
setSize(680,420);
setTitle("Open Project");
setLocation((screen.width - 590)/2,((screen.height - 280)/2) - 45);
public JTabbedPane getTable() {
UITab = new JTabbedPane();
strForm_lang = form_lang.getSelectedItem().toString();
strForm_name = form_name.getSelectedItem().toString();
int count1=0;
int row1=0;
try {
rs = db.execSQL("Select * from mst_default where def_proj_id = '"+strGetProj_id+"' AND def_category = 'Title'" );
while(rs.next()) {
count1 += 1;
getDef_id = rs.getInt("def_id");
column = new String[count1][2];
rs1 = db.execSQL("Select form_id from mst_form WHERE form_name = '"+strForm_name+"'");
while(rs1.next()) {
getForm = rs1.getInt("form_id");
System.out.println("getForm");
rs2 = db.execSQL("Select lang_id from mst_language WHERE lang_name = '"+strForm_lang+"'");
while(rs2.next()) {
getLang = rs2.getInt("lang_id");
System.out.println("getLang");
rs3 = db.execSQL("Select * from mst_default a, mst_translation b WHERE a.def_form_id = '"+getForm+"' AND b.trans_lang_id = '"+getLang+"' AND a.def_proj_id = '"+strGetProj_id+"' AND b.trans_def_id = '"+getDef_id+"' AND a.def_category = 'Title' " );
while(rs3.next()) {
column[row1][0] = "" + rs3.getString("display_name"); // rowNum ay kung ilan ang row na ilalabas
column[row1][1] = "" + rs3.getString("translation"); // Default yung isang array ng column ko, kaya fixed
row1++;
row1 = 0;
} catch(SQLException sqlex) {
sqlex.printStackTrace();
System.exit(1);
// End
table1 = new JTable(new MyTableModel()){
scrollPane1 = new JScrollPane(table1);
UITab.setBounds(30,100,610,250);
UITab.add("Title",scrollPane1);
return UITab;
class MyTableModel extends AbstractTableModel {
// Pagawa ng header Coloumn
String ColumnHeaderName[] = {
"Default Text",""+strForm_lang+" Translation"
//End
public int getColumnCount() {
//System.out.println("The Column Count is" + ColumnHeaderName.length);
return ColumnHeaderName.length;
public int getRowCount() {
//System.out.println("The Row Count is" + column.length);
return column.length;
public String getColumnName(int col) {
//System.out.println("The Column Name is" + ColumnHeaderName[col]);
return ColumnHeaderName[col];
public Object getValueAt(int row,int col) {
System.out.println("The value at row and column = " + column[row][col]);
return column[row][col];
public int getSelectedRow() {
System.out.println("Integer" + column.length);
return column.length;
ActionListener actions = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String source = ae.getActionCommand();
if (source == "load") {
table1.clearSelection();
panel1.add(getTable());
table1.addNotify();
repaint();
} else if (source == "default") {
dispose();
TextDefaultForm form = new TextDefaultForm(OwnerFrame,JFParentFrame);
form.setVisible(true);
} else if (source == "lang") {
dispose();
CreateProject lang = new CreateProject(JFParentFrame);
lang.setVisible(true);
} else if (source == "exit") {
dispose();
} else if (source == "edit") {
if (table1.getValueAt(table1.getSelectedRow(),table1.getSelectedColumn()) != null){
formLang lang = new formLang(OwnerFrame,strCol,strRow, strGetProj_id);
lang.setVisible(true);
MouseListener MouseTableListener = new MouseListener() {
public void mouseClicked(MouseEvent e) {
// Ilabas yung form
if(e.getClickCount() == 2 ) {
dispose();
int col_a = 0;
int col_b = 1;
selectedRow1 = table1.getSelectedRow();
Object objColumn1 = table1.getValueAt(selectedRow1, col_a);
Object objRow1 = table1.getValueAt(selectedRow1, col_b);
strCol = objColumn1.toString();
strRow = objRow1.toString();
formLang lang = new formLang(OwnerFrame,strCol,strRow,strGetProj_id);
System.out.println(selectedRow1);
System.out.println(strCol);
System.out.println(strRow);
lang.txtProj.setText(strCol);
lang.txtLang.setText(strRow);
lang.show();
} else if (e.getClickCount() == 1) {
table1.setSelectionBackground(Color.blue);
table1.setColumnSelectionAllowed(false);
table1.setRowSelectionAllowed(true);
table1.setFocusable(true);
int a = table1.getRowCount();
System.out.println("Row Count = " + a);
int sel = table1.getSelectedRow();
//if (sel == -1) return;
System.out.println("Selected Row = " + sel);
System.out.println(table1.isRowSelected(sel));
public void mouseReleased(MouseEvent e) {
public void mouseExited(MouseEvent e) {
public void mouseEntered(MouseEvent e) {
public void mousePressed(MouseEvent e) {
//public static void main(String leo[]) {
//OpenProject open = new OpenProject();
} -
How do I add a JCheckBox to a JTable - URGENT HELP NEEDED
Hello All,
This is kicking my butt. I need to create a JTable that I can dynamically add and delete rows of data to and this table must contain a JCheckBox which I can read the value of. I've been able to find examples out there that provides the ability to have a JCheckBox in the JTable, but do not also provide the function to add / delete rows from the JTable. I need to have both funtions in my table. Can somebody out there please help me with this?
Here's a simple example that I'm working with as a test to figure this out. This example has the functionality to add rows of data.
Thanks in advance.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
JButton btnAdd;
BorderLayout layout;
DefaultTableModel model;
public static void main(String[] args)
TableTest app = new TableTest();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public TableTest()
super("Table Example");
layout = new BorderLayout();
Container container = getContentPane();
container.setLayout(layout);
btnAdd = new JButton("Add");
btnAdd.addActionListener(this);
model = new DefaultTableModel();
JTable table = new JTable(model);
// Create a couple of columns
model.addColumn("Col1");
model.addColumn("Col2");
// Append a row
model.addRow(new Object[] { "v1", "v2" });
model.addRow(new Object[] { "v3", "v4" });
JScrollPane scrollPane = new JScrollPane(table);
container.add(btnAdd, BorderLayout.NORTH);
container.add(scrollPane,BorderLayout.CENTER);
setSize(300, 200);
setVisible(true);
public void actionPerformed(ActionEvent e)
if (e.getSource() == btnAdd)
model.addRow(new Object[]{"Test", new Boolean(true)});
}I got it, I added the public Class getColumnClass to new DefaultTableModel(). Here it is for your viewing pleasure.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
JButton btnAdd;
BorderLayout layout;
DefaultTableModel model;
JTable table;
public static void main(String[] args)
TableTest app = new TableTest();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public TableTest()
super("Table Example");
layout = new BorderLayout();
Container container = getContentPane();
container.setLayout(layout);
btnAdd = new JButton("Add");
btnAdd.addActionListener(this);
model = new DefaultTableModel()
public Class getColumnClass(int col)
switch (col)
case 1 :
return Boolean.class;
default :
return Object.class;
table = new JTable(model);
// Create a couple of columns
model.addColumn("Col1");
model.addColumn("Col2");
// Append a row
model.addRow(new Object[] { "v1", new Boolean(false)});
model.addRow(new Object[] { "v3", new Boolean(false)});
JScrollPane scrollPane = new JScrollPane(table);
container.add(btnAdd, BorderLayout.NORTH);
container.add(scrollPane, BorderLayout.CENTER);
setSize(300, 200);
setVisible(true);
public void actionPerformed(ActionEvent e)
if (e.getSource() == btnAdd)
model.addRow(new Object[] { "Karl", new Boolean(true)}); -
Can anybody help me in fixing the problem ? of JTable ( CODE GIVEN )
My problem is
1)when i select the combo box (2nd column) through keyboard the selected item is not visible in the cell
2) i need to press TAB key twice to go to next cell .
3) also before editing i need to press a key to start editing (caret visible) HELP ME
CODE CAN BE RUN TO SEE WHAT I MEANT
<code>
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import java.text.*;
public class BaseTable
public JScrollPane scrollPane;
public JTable table;
public int totalRows;
public int i,numRows,numCols;
public TableModel model;
public int rowCount;
public JComboBox box;
public BaseTable()
String[] items=new String[]{"item1","jItem2","kItem3","Item4","Item5","Item6"};
String[] columns = {"Column1","Column2","Column3","Column4","Column5","Column6","Column7","Column8","Column9"};
box=new JComboBox(items);
box.setEditable(true);
DefaultTableModel baseModel=new DefaultTableModel();
baseModel.setColumnIdentifiers(columns);
table = new JTable(baseModel)
protected void processKeyEvent(KeyEvent e)
if ( e.getID() == KeyEvent.KEY_PRESSED && e.getKeyCode() != e.VK_TAB)
int column = table.getSelectedColumn();
int row = table.getSelectedRow();
Rectangle r = getCellRect(row, column, false);
Point p = new Point( r.x, r.y );
SwingUtilities.convertPointToScreen(p, table);
try
System.out.println("PROCESS KEY EVENT Typing"+e.getKeyCode());
Robot robot = new Robot();
robot.mouseMove(p.x, p.y );
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.mouseRelease(InputEvent.BUTTON1_MASK);
robot.mouseMove(0, 0 );
catch (Exception e2) {}
else
System.out.println("PROCESS KEY EVENT IN ELSE");
if(e.getKeyCode() == e.VK_TAB && table.isEditing())
((DefaultCellEditor)table.getCellEditor()).stopCellEditing();
else
super.processKeyEvent(e);
Vector vectorRow = new Vector();
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
TableCellEditor tableCellEditor_comboBox = new MyCustomTableCellEditor(box,this);
table.getColumnModel().getColumn(1).setCellEditor(tableCellEditor_comboBox);
((DefaultTableModel)table.getModel()).addRow(vectorRow);
rowCount = table.getRowCount();
((DefaultTableModel)table.getModel()).fireTableRowsInserted(rowCount,rowCount);
scrollPane = new JScrollPane(table);
scrollPane.setForeground(Color.white);
rowCount = table.getRowCount();
numCols = table.getColumnCount();
public class MyCustomTableCellEditor extends DefaultCellEditor
JTable table=null;
BaseTable baseTable=null;
JComboBox box=null;
MyCustomTableCellEditor(JComboBox editorComponent,BaseTable baseTable)
super(editorComponent);
this.table=baseTable.table;
this.baseTable=baseTable;
setClickCountToStart(0);
public Component getTableCellEditorComponent(
JTable table,
Object value,
boolean isSelected,
int row,
int column)
super.getTableCellEditorComponent(table,value,isSelected,row,column);
box=(JComboBox)getComponent();
box.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
return box;
public static void main(String s1[])
BaseTable t=new BaseTable();
JFrame f=new JFrame();
f.getContentPane().add(t.scrollPane);
f.setSize(800,200);
f.setVisible(true);
</code>sahas@sun, you're very impolite! farukkhan was trying to help, and he's right because when you use code formatting the code is really easier to read.
Perhaps you have lost a chance for getting the answer! -
JTable - Help with column names and rowselection
Hi,
Is there anyone that can help me. I have successfully been able to load a JTable from an MS access database using vectors. I am now trying to find out how to hardcode the column names into the JTable as a string.
Can anyone please also show me some code on how to be able update a value in a cell (from ''N'' to ''Y'') by double clicking on that row.
How can I make all the other columns non-editable.
Here is my code:
private JTable getJTable() {
Vector columnNames = new Vector();
Vector data = new Vector();
try
// Connect to the Database
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
// String url = "jdbc:odbc:Teenergy"; // if using ODBC Data Source name
String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=C:/Documents " +
"and Settings/Administrator/My Documents/mdbTEST.mdb";
String userid = "";
String password = "";
Class.forName( driver );
Connection connection = DriverManager.getConnection( url, userid, password );
// Read data from a table
String sql = "select * from PurchaseOrderView";
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery( sql );
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++)
columnNames.addElement( md.getColumnName(i) );
// Get row data
while (rs.next())
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++)
row.addElement( rs.getObject(i) );
data.addElement( row );
rs.close();
stmt.close();
catch(Exception e)
System.out.println( e );
if (jTable == null) {
jTable = new JTable(data, columnNames);
jTable.setAutoCreateColumnsFromModel(false);
jTable.setAutoResizeMode(javax.swing.JTable.AUTO_RESIZE_NEXT_COLUMN);
jTable.setShowHorizontalLines(false);
jTable.setGridColor(java.awt.SystemColor.control);
jTable.setRowSelectionAllowed(true);
jTable.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
jTable.setShowGrid(true);
return jTable;
}this method has a default behavior to supply exactly what you're seeing: column names consisting of the capitalized letters, "A", "B", "C".Thanks Pete, had seen that but never really thought about it... about 10 days ago somebody needed to obtain Excel column names, I'd offered a rigorous solution and now see it would have been shorter and simpler (if a little heavier) to extend DefaultTableModel and provide the two additional methods needed (getOffsetCol and getColIndex).
Not much of a difference in LOC but certainly more elegant ;-)
Darryl -
PLEASE could someone help me look at this and see why the color of my data in a jtable cell is niot turning red when I press enter
THX
package mintest;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
import com.borland.jbcl.layout.*;
import java.awt.color.*;
import javax.swing.event.*;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import java.awt.datatransfer.*;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
import javax.swing.border.EtchedBorder;
import java.io.*;
import java.awt.print.*;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import java.awt.Color;
import java.awt.Component;
import javax.swing.table.DefaultTableCellRenderer;
public class VeckoSchema extends JPanel
private boolean DEBUG = false;
JTabbedPane tabbedPane;
Color rgdcolor2= new Color (0,153,255); //Definiera f?rgen f?r schema-,projekt- och l?nehuvudflikarna
Color rgdcolor1= new Color (0,102,255);
Color rgdcolor3= new Color (51,204,255); //Definiera f?rgen f?r schema-,projekt- och l?nehuvudflikarna
Color rgdcolor= new Color (0,0,153);
Color rgdcolor4= new Color (153,153,153);
JList list;
DefaultListModel listModel = new DefaultListModel();
ImageIcon icon= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\Bakgrundsbild2.jpg");
ImageIcon icon1= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\Save16.gif");
ImageIcon icon2= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\printer2.gif");
JButton spara;
JButton Ok_knapp = new JButton();
JPanel panel7;
TitledBorder title;
Border blackline;
JTable table = new JTable(new MyTableModel());
int x;int y;
Object data1;
//ColorRenderer renderer;
Color mincellColor= Color.red;
TableCellRenderer Renderer;
public VeckoSchema() {
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
private void jbInit() throws Exception
this.setBackground(rgdcolor2);
this.setLayout(null);
//Skapa tabellen
//JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(30, 40, 1000, 600);//(avst?nd fr?n v?nster sidan 49, avst?nd fr?n norr 39, bredd 144, h?jd 38));
this.add(scrollPane);
//TableCellRenderer weirdRenderer = new WeirdRenderer();
table.setCellSelectionEnabled(true);
table.requestFocus(true);
table.getInputMap().put(KeyStroke.getKeyStroke(
KeyEvent.VK_ENTER, 0),
"check");
table.getActionMap().put("check", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
try {
System.out.println("BINGO");
x= table.getSelectedColumn() ;
y= table.getSelectedRow() ;
//System.out.println("markerad kolumn ?r" + table.getSelectedColumn()) ;
//System.out.println("markerad Rad ?r" + table.getSelectedRow()) ;
// table.setColumnSelectionAllowed(true);
data1 = table.getModel().getValueAt(
table.getSelectedRow(),
table.getColumnModel().getColumn(
table.getSelectedColumn()).getModelIndex());
System.out.println("markerad text inneh?ller" + data1);
x= table.getSelectedColumn() ;
y= table.getSelectedRow() ;
/* table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
System.out.println("hejsan hoppsan markerad text inneh?ller" + data1);
Component cell =super.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
if (row == y && column == x ) {
System.out.println("rad"+y);
System.out.println("column"+x);*/
//cell.setFont(new java.awt.Font("Dialog", 0, 20));
/* cell.setForeground(Color.red);
else
cell.setForeground(null);
return cell;
// ColorRenderer centerRenderer = new ColorRenderer();
// Use renderer on a specific column
/* TableColumn column = table.getColumnModel().getColumn(
table.getColumnModel().getColumn(
table.getSelectedColumn()).getModelIndex()
column.setCellRenderer( centerRenderer );
table.setDefaultRenderer(String.class, centerRenderer);*/
class table extends JTable {
ColorRenderer multiRenderer=new ColorRenderer();
table(MyTableModel tm)
super(tm);
public TableCellRenderer getCellRenderer(int row,int col) {
if (row == y && col == x) return multiRenderer;
else return super.getCellRenderer(row,col);
catch(Exception x) {
x.printStackTrace();
class MyTableModel extends AbstractTableModel {
String[] columnNames = {"",
"M?NDAG",
"TISDAG",
"ONSDAG",
"TORSDAG",
"FREDAG",
"L?RDAG",
"S?NDAG"};
Object[][] data = {
{"Anna Svensson","", "","Eji Eze", "","","",""},
{"","", "","", "Christopher ?kesson","Eji Eze","",""},
{"","", "","", "","Sara Eggert","",""},
{"Eji Eze","", "","", "","","",""},
{"Stefan Wielsel","", "","", "","","",""},
{"","", "","", "","","Anna Persson","Markus Nilsson"},
{"","Markus Nilsson", "Malin Mejby","", "","","",""},
{"","Stefan Wiesel", "","", "","","",""},
{"","Anna Svensson", "","", "","","",""},
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];
/* Denna metod g?r det m?jligt att ?ndrar i tabellen*/
public boolean isCellEditable(int row, int col) {
if (col < 8) {
return false;
} else {
return true;
/*Denna metod g?r s? ?ndringarna som g?rs i en viss cell inte f?rsvinnar d? man l?mnar cellen*/
Object[][] value = { {"Chiji Eze"},
int row= 3;
int col = 4;
public void setValueAt(Object value, int row, int col) {
/* if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
/* if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
/* private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");*/
/*class MyCellColor extends DefaultTableCellRenderer
public MyCellColor()
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
JLabel result = null;
if(isSelected && value != null)
result = new JLabel(value.toString());
result.setOpaque(true);
result.setForeground(Color.blue);
System.out.println("Result "+result.getText());
System.out.println("Color is "+result.getForeground());
return result;
/* public TableCellRenderer getCellRenderer (int row, int column)
//seulement pour la premiere colonne
if (column == 0)
return Renderer;
// sinon le Renderer par d?faut
return super.getCellRenderer (row, column);
class ColorRenderer extends JTextArea implements TableCellRenderer{ //DefaultTableCellRenderer
Color testfarg;
public ColorRenderer( ){
testfarg= Color.red;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
System.out.println("hejsan hoppsan markerad text inneh?ller" + data1);
//Component cell =super.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
if(row==y && column == x)
setForeground(testfarg);
else
setBackground(null);
return this;You really need to study this tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
After you have read it, take a look at this example, and tweak it to suit your needs:
import javax.swing.table.*;
import javax.swing.*;
public class Test {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(new JTable(new MyTableModel())));
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
class MyTableModel extends AbstractTableModel {
private String columnNames[] = new String[] {
"Name", "Checked"
private Class columnClasses[] = new Class[] {
String.class, Boolean.class
private Object data[][] = new Object[][] {
{ "One", Boolean.TRUE },
{ "Two", Boolean.FALSE },
{ "Three", Boolean.FALSE },
{ "Four", Boolean.TRUE },
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public Object getValueAt(int rowIndex, int columnIndex) {
return data[rowIndex][columnIndex];
public Class getColumnClass(int columnIndex) {
return columnClasses[columnIndex];
public String getColumnName(int columnIndex) {
return columnNames[columnIndex];
public boolean isCellEditable(int rowIndex, int columnIndex) {
if (columnIndex == 1)
return true;
else
return false;
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
data[rowIndex][columnIndex] = aValue;
} -
Hello,
Can any one help me in a small question.
I use JTable to display some values it is a two dimentional table.
Now can any one tell me how to put an icon in to a particular cell of the table
it may be and cell.
Best Regards,
SreedharYou can use a custom TableCellRenderer to do this. There are good examples of doing this in the JTable lessons in the turorial on this site. To put icons in particular cells you need to define the conditions where a icon should be displayed and then code that logic into your renderer.
After you have read the tutorial and started on your own renderer post specific questions.
Cheers
DB
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