Painting problems with JTable
i am using JTable inside an JApplet , if i change the table model by adding a row , and attach it to table i can't see the new added row , but if i resize the applet then i could be able to see the new added row. why is this beviour?
is it someting to do with JApplet painting event.
In JApplet i am using some AWT components.. other than JTable , is it happening because of this?
thanx in advance,
Abhijit Choudhary,
Hi,
that cannot be said, if you do not specify which TableModel you use - is it a DefaultTableModel or is it an own class that you use as TableModel?- What does the method, that adds a row?- Does this method notify all TableModelListeners of the changes done?- Guess, that is the point, the TableModelListeners are not notified about that, that a new row has been added - so a listener (JTable is one of them) is unable to update its display until a resize forces it to ask the TableModel for its size (row, column and so on) and update its display this way.
That is the behavior you see ... so it should be a missing TableModelEvent when adding a row.
greetings Marsian
Similar Messages
-
Hello,
i have a selection problem with JTable. I want to allow only single cell selection and additionally limit the selection to the first column.
I preffered the style from MS Outlook Express where you can select the email accounts to edit.
It is a table like this:
Account name | Type | ...
--------------|---------|---------------------
Hotmail | POP3 |
GMX | IMAP |The selection should be only avaibable at 'Hotmail' or 'GMX' - not at 'POP3', 'IMAP' or as complete row selection.
Please help me!
Thanks.
WarlockMaybe this will helpimport java.awt.*;
import javax.swing.*;
public class Test3 extends JFrame {
public Test3() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
String[] head = {"One", "Two"};
String[][] data = {{"R1-C1", "R1-C2"}, {"R2-C1", "R2-C2"}};
JTable jt = new JTable(data, head);
jt.getColumnModel().setSelectionModel(new MyTableSelectionModel());
content.add(new JScrollPane(jt), BorderLayout.CENTER);
jt.setCellSelectionEnabled(true);
jt.setRowSelectionAllowed(false);
jt.setColumnSelectionAllowed(false);
setSize(300, 300);
setVisible(true);
public static void main(String[] arghs) { new Test3(); }
class MyTableSelectionModel extends DefaultListSelectionModel {
public void setSelectionInterval(int index0, int index1) {
super.setSelectionInterval(0, 0);
} -
Hi,
I have encountered a problem with JTable, i am trying to display some 15 columns and their values , one of the columns value is null, then the JTable is not displaying its value from this column(which is with null value) onwards.
Can anybody assiss me in this matter.
Regards
khiz_engI don't know If I can fix your problem, but
I know just that it works on my PC.... It's very very
slow... I don't know how to insert PageSetUp option... I have to study the problem.....
However I don't think it's a hard problem....
I want ask to you if you have found some problems when you are in Editing mode in a cell.....
in the jdk1.2 version I could save while was in editing mode using the editingStopped method.
It permit to update all data .... also the data in the cell I was editing.
in the jdk 1.3 if I use this method It doesn't work properly... It maybe destroy the content object in the Cell..... because I'm able to print all the table except the editing cell (it throw an exception...)
What's changed????
I don't know...
Can u help me? -
Hi !
I have a problem with JTable - would like to use this component as a simple list of rows taken from a database : don't want to be able select or set a focus to a column - want only to be able select and set focus to a row ( just like in the menus). How to disable "focusability" for a cell with JTable ? Could You help me ?
thnx in advanceThe Border is changed by the renderer, depending on whether the cell has focus or not. So you will need to create custom renderers without a Border. Something like:
class NoBorderRenderer extends DefaultTableCellRenderer
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
setBorder(null);
return this;
} -
Problem with JTable and JPanel
Hi,
I'm having problems with a JTable in a JPanel. The code is basicly as follows:
public class mainFrame extends JFrame
public mainFrame()
//A menu is implemeted giving rise to the following actions:
public void actionPerformed(ActionEvent evt)
String arg = evt.getActionCommand();
if(arg.equals("Sit1"))
//cells, columnNames are initiated correctly
JTable table = new JTable(cells,columnNames);
JPanel holdingPanel = new JPanel();
holdingPanel.setLayout( new BorderLayout() );
JScrollPane scrollPane = new JScrollPane(holdingPanel);
holdingPanel.setBackground(Color.white);
holdingPanel.add(table,BorderLayout.CENTER);
add(scrollPane, "Center");
if(arg.equals("Sit2"))
if(scrollPane !=null)
remove(scrollPane);validate();System.out.println("ScrollPane");
if(holdingPanel !=null)
remove(holdingPanel);
if(table !=null)
remove(table);table.setVisible(false);System.out.println("table");
//Put other things on the holdingPanel....
private JScrollPane scrollPane;
private JPanel holdingPanel;
private JTable table;
}The problem is that the table isn't removed. When you choose another situation ( say Sit2), at first the table apparently is gone, but when you press with the mouse in the area it appeared earlier, it appears again. How do I succesfully remove the table from the panel? Removing the panel doesn't seem to be enough. Help is much appreciated...
Best regards
SchwartzIf you reuse the panel and scroll pane throughout the application,
instantiate them in the constructor, not in an often-called event
handler. In the event handler, you only do add/remove of the table
on to the panel. You can't remove the table from the container
which does not directly contain it.
if (arg.equals("Sit2")){
holdingPanel.remove(table);
holdingPanel.revalidate();
holdingPanel.repaint(); //sometimes necessary
} -
Scrollbar problem with JTable.
Hi,
I have 45 columns in a JTable. Please remember this is customize, we can change the number of columns dynamically, at max they can be 2 columns.
i was having a problem with display the columns names in my Frame. I posted at http://forum.java.sun.com/thread.jspa?threadID=5167358&messageID=9641265#9641265
I got the solution. Thanks for that.
But as i said these columns are customized.
when i am having 2 columns in my JTable, table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF ); is behaving differently, it's not occupying the complete JFrame. Lots of space is left out beside these 2 columns.
When i comment this line, then those 2 columns are occupying my complete Frame.
these two colmns should occupy my complete Frame and if i select 45 columns i should get scroll bar at botton with complete column NAMES.
Hope i am clear.
My Snippet
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.*;
public class SimpleTable extends JPanel {
private boolean DEBUG = false;
public SimpleTable() {
super(new BorderLayout());
String[][] values = new String[10][];
String[] columnNames = {
"First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian"
Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
DefaultTableModel defaulttablemodel = new DefaultTableModel(data,columnNames);
final JTable table = new JTable(defaulttablemodel)
public boolean isCellEditable(int row,int column)
return false;
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
private static void createAndShowGUI() {
JFrame frame = new JFrame("SimpleTable");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
SimpleTable newContentPane = new SimpleTable();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}Thank You camickr, it's serving my purpose.
Just for a clarrification :
table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
table.setAutoscrolls(false);without using these lines also my purpose is serving.....then y do we need above two lines of code. r they necessary
i mean, this snippet is sufficient.
public boolean getScrollableTracksViewportWidth()
return getPreferredSize().width < getParent().getWidth();
} -
Report Painter problem with empty selection variant
Hello,
I use the cost center selection variant for the column definition in Report Painter as characteristic value. This selection variant get only the cost centers which are valid from 1.1.2003 to 31.12.2004. The column of the report created by Report Painter which uses this selection variant display value without taking into account limitations follow from this selection variant. I expect value zero for year fiscal year 2007 in this column, because the cost centers are invalid in 2007 year but the report displays different value. The problem appeared after upgrade from 4.6C to ECC 6.0.
Best Regards
ZDMy problem with Report Painter occurred when I was creating my own report based on 1VK library.
In my example I used in the column definition characteristic Cost
Center, which is determined by selection variant, and Basic Key Figure
equal SWKG-Costs. For system date (18.07.2007) there are no valid
master data for the characteristic Cost Center but when I execute
report for fiscal year 2007 the column display no-zero value without
taking into account value of Characteristic Cost Center. I expected
zero value in this column because there are no postings for Cost
Centers (no valid cost centers were selected) in financial year 2007.
Could you help me with this problem ? -
I have a problem with applying a custom renderer. I know the renderer works so thats not the problem. If I do like this:
DefaultTableModel aDefaultTableModel = new DefaultTableModel(data, columnNames);
it works. But if I do like this:
DefaultTableModel aDefaultTableModel;
aDefaultTableModel.setDataVector(data, columNames);
is doesn't, why?I think maybe it's not the renderer at all. It may be my custom TableModel thats causing problems. Now this doesn't work:
private JTable aTable;
private CustomTableModel aTableModel;
public MyProgram() {
aTableModel = new CustomTableModel();
aTable = new JTable(aTableModel);
aTableModel.setData(data, columnNames);
private class CustomTableModel {
private String[] columnNames = null;
private Object[][] data = null;
public CustomTableModel() {
columnNames = new String[0];
data = new Object[0][0];
... snip
public void setData(Object[][] data, String[] columnNames) {
this.data = data;
this.columnNames = columnNames;
fireTableDataChanged();
... snip
Now, why doesn't that setData method work?? -
Hi All,
I am facing some problems in JTable :
1) How to remove all lines between cells, neither i should have column nor row lines....there should not be any lines between any cell at all.
2) If i select a perticular cell, complete row is getting selected with a blue background, that should not happen at all.....row should not get select....
3) How to make a cell non editable.
Regards,
Ravi1) Read the API. Check out the set??? methods until you fine what you want
2) Read the API. Check out the methods that deal with row and column selection
3) Override isCellEditable(...) method of JTable or DefaultTableModel -
Painting problems with cwgraph in multiple document interface (mdi).
Has anyone else seen weird behavior when using a cwgraph on an MDI child form in .NET. Whenever I open a new child window (containing a cwgraph) it gets painted once in the correct location and again offest about 50 pixels away and the old original location doesn't get invalided properly.
The only workaround I've found is to contain the cwgraph in a panel or groupbox and the problem seems to go away entirely.Do you only see this problem with the graph, or do you see it with other Measurement Studio controls as well? Do you have any other ActiveX control on an MDI child and if so, what is the behavior of those controls? Could you please post a small test project that reproduces the problem? Thanks.
- Elton -
Problem with JTable in a JScrollPane
Hello all,
I have a problem using JTable, that the number of columns is very big,
and the JScrollPane shows only vertical ScrollBar, isn't there any way to show a horizontal ScrollBar, to show the other columns without being bunched.
Thanks in advance.table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
-
Flipping problems with JTables
I have a JTable (with scroll bar ) and a JButton inside a Jframe.
When I push the JButton another JFrame appears with another JTable inside.
The problem is that when I close the upper JFrame and I try to move the scroll bar of the JTable inside the father JFrame it starts to flip doing an horrible effect for the general lauyout.The solution it could be overwrite the paint method....but actually for my Java knowledges is impossibe. Help !Sorry I mean flashing problems (not flipping.)
The code is:
JPanel p1=new JPanel();
Label lab1=new Label(" LABORATORIO ANALISI CLINICHE");
Label lab2=new Label(" Dr.ssa xxxxxxxxxxxx ");
Label lab3=new Label(" C/o xxxxxxxxxxxxx ");
Label lab4=new Label(" Via xxxxxxxxxxx nr 5/7");
Label lab5=new Label(" 86100 xxxxxxxxxx");
Label lab6=new Label(" tel. xxxxxxxxxx");
p1.setLayout(new GridLayout(6,1));
p1.add(lab1);
p1.add(lab2);
p1.add(lab3);
p1.add(lab4);
p1.add(lab5);
p1.add(lab6);
Report myReport=new Report(tableModels[p.getSelectedIndex()],"Printer Manager",p1);
Actually Report is a class that prepare a JFrame with a JPanel and inside the JPanel there is a JScrollPane that get the JTable.That's the code for the Report class:
import javax.swing.*;
import javax.swing.table.*;
import java.awt.print.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.Dimension;
public class Report extends Frame implements Printable
JFrame frame;
JTable tableView;
JComponent component_dummy;
public Report(AbstractTableModel tableModel,String title,JComponent component)
super(title);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) { dispose(); } } );
final String[] headers = {"Description", "open price",
"latest price", "End Date", "Quantity"};
final Object[][] data = {
{"Box of Biros", "1.00", "4.99", new Date(), new Integer(2)},
{"Blue Biro", "0.10", "0.14", new Date(), new Integer(1)},
{"legal pad", "1.00", "2.49", new Date(), new Integer(1)},
{"tape", "1.00", "1.49", new Date(), new Integer(1)},
{"stapler", "4.00", "4.49", new Date(), new Integer(1)},
{"legal pad", "1.00", "2.29", new Date(), new Integer(5)}
TableModel dataModel = new AbstractTableModel() {
public int getColumnCount() { return headers.length; }
public int getRowCount() { return data.length;}
public Object getValueAt(int row, int col) {
return data[row][col];}
public String getColumnName(int column) {
return headers[column];}
public Class getColumnClass(int col) {
return getValueAt(0,col).getClass();}
public boolean isCellEditable(int row, int col) {
return (col==1);}
public void setValueAt(Object aValue, int row, int column) {
data[row][column] = aValue;
dataModel=tableModel;
tableView = new JTable(dataModel);
// component_dummy= new JComponent();
component_dummy=component;
JScrollPane scrollpane = new JScrollPane(tableView);
scrollpane.setPreferredSize(new Dimension(600,300));
this.setLayout(new BorderLayout());
this.add(BorderLayout.NORTH,component);
this.add(BorderLayout.CENTER,scrollpane);
JButton printButton= new JButton();
printButton.setText("Stampa");
//this.getContentPane().add(BorderLayout.SOUTH,printButton);
this.add(BorderLayout.SOUTH,printButton);
// for faster printing turn double buffering off
RepaintManager.currentManager(
frame).setDoubleBufferingEnabled(false);
printButton.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent evt) {
PrinterJob pj=PrinterJob.getPrinterJob();
pj.setPrintable(Report.this);
pj.printDialog();
try{
pj.print();
}catch (Exception PrintException) {}
this.setVisible(true);
this.pack();
public int print(Graphics g, PageFormat pageFormat,
int pageIndex) throws PrinterException
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.black);
int fontHeight=g2.getFontMetrics().getHeight();
int fontDesent=g2.getFontMetrics().getDescent();
//leave room for page number
double pageHeight = pageFormat.getImageableHeight()-fontHeight;
double pageWidth = pageFormat.getImageableWidth();
double tableWidth = (double) tableView.getColumnModel().getTotalColumnWidth();
double scale = 1;
if (tableWidth >= pageWidth)
scale = pageWidth / (tableWidth+(int)(pageWidth/2-pageWidth*0.43));
double headerHeightOnPage=
tableView.getTableHeader().getHeight()*scale;
double tableWidthOnPage=tableWidth*scale;
double oneRowHeight=(tableView.getRowHeight()+
tableView.getRowMargin())*scale;
int numRowsOnAPage=
(int)((pageHeight-headerHeightOnPage)/oneRowHeight);
double pageHeightForTable=oneRowHeight*numRowsOnAPage;
int totalNumPages= (int)Math.ceil((
(double)tableView.getRowCount())/numRowsOnAPage);
if(pageIndex>=totalNumPages)
return NO_SUCH_PAGE;
g2.translate(0f,0f);
g2.drawString("Laboratorio analisi Cliniche",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.86));
g2.drawString("Dr.ssa xxxxxxxxx",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.82));
g2.drawString("C/o xxxxxxxxxxxxxx",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.78));
g2.drawString("Via xxxxxxxxxxx",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.74));
g2.drawString("86100 xxxxxxxxx",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.70));
g2.drawString("tel. 0874/316147-91720",(int)(pageWidth/2-pageWidth*0.33),
(int)(pageHeight+fontHeight-fontDesent-pageHeight*0.66));
// g2.translate(0f,headerHeightOnPage);
g2.translate((int)(pageWidth/2-pageWidth*0.33),-pageIndex*pageHeightForTable+(pageHeight+fontHeight-fontDesent-pageHeight*0.56));
//If this piece of the table is smaller than the size available,
//clip to the appropriate bounds.
if (pageIndex + 1 == totalNumPages)
int lastRowPrinted = numRowsOnAPage * pageIndex;
int numRowsLeft = tableView.getRowCount() - lastRowPrinted;
g2.setClip(0,(int)(pageHeightForTable * pageIndex),
(int) Math.ceil(tableWidthOnPage),
(int) Math.ceil(oneRowHeight * numRowsLeft));
//else clip to the entire area available.
else
g2.setClip(0, (int)(pageHeightForTable*pageIndex),
(int) Math.ceil(tableWidthOnPage),
(int) Math.ceil(pageHeightForTable));
g2.scale(scale,scale);
tableView.paint(g2);
g2.scale(1/scale,1/scale);
g2.translate(0,pageIndex*pageHeightForTable);
g2.translate(0, -headerHeightOnPage);
g2.setClip(0, 0,(int) Math.ceil(tableWidthOnPage),
(int)Math.ceil(headerHeightOnPage));
g2.scale(scale,scale);
tableView.getTableHeader().paint(g2); //paint header at top
return Printable.PAGE_EXISTS;
public static void main(String[] args)
do you think that there are problems because the print method ? or mayby because I clipped the graphics area ? -
In my table I have a column of checkboxes. If user clicks any checkbox, the program will first check for some condition and pop out a warning dialog saying that "the action will change the current mode. are you sure you want to continue?". If user select "yes", some action are taken and the checkbox should be selected. Now the problem is that after user select "yes", the checkbox is not selected. (Same as when you press your mouse at a checkbox and then drag it out the checkbox cell, the actions are taken but the checkbox is not selected.)
The code for the cell editor is as follows:
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
if (value instanceof ComboString) { // ComboString
flg = COMBO;
String str = (value == null) ? "" : value.toString();
System.out.println("+++++++ " + row+" : "+column+" flg: "+flg);
return cellEditors[COMBO].getTableCellEditorComponent(table, str,
isSelected, row, column);
else if (value instanceof Boolean) {
flg = BOOLEAN;
Boolean check = Boolean.getBoolean(value.toString());
// promptContinue returns true for continue, false for return; inside it a dialog box is popped for user selection "continue or not"
if(!promptContinue()){
return null;
return cellEditors[BOOLEAN].getTableCellEditorComponent(table,
value, isSelected, row, column);
Thanks. But my problem is not with stopping the editor, but with continuing the editor. Following is the code of getCellEditorValue()
public Object getCellEditorValue() {
switch (flg) {
case COMBO:
String str = (String) comboBox.getSelectedItem();
return new ComboString(str);
case BOOLEAN:
case STRING:
return cellEditors[flg].getCellEditorValue();
default:
return null;
}I am not very sure whether it is the problem of cell editor or cell renderer, because it seems the code for continue condition is actually executed which is supposed to make the checkbox checked, but the result turns to be that the checkbox is not checked. -
A serious problem with JTable to update with new data.
I am customizing a JTable. In the table 3 rows and row wise same data presents. After every 30 sec table will be update with new data. But a exception is coming like: ArrayIndexOutofBound 4>=0. Exception is not coming so frequently some time it comes within 1 min or after 1 hour of program running and each time *4>=0* is varies with different number.
Here is the model i am using and to update table i am calling setTableData( ) with updated vector as a argument.
public class MyModel extends AbstractTableModel {
protected Vector m_vector;
public MyModel(Vector m_vector) { this.m_vector = m_vector; }
public int getColumnCount() {
return m_vector==null ? 0 : m_vector.size();
public int getRowCount() { return 3; }
public String getColumnName(int col) { return null; }
public Object getValueAt(int row, int col) {
if (col < 0 || col>=getColumnCount())
return null;
try{
MyData column = (MyData)m_vector.elementAt(col);
switch (row) {
case 0: return column.gate;
case 1: return column.time;
case 2: return column.status;
}}catch(Exception e){
System.out.println("Error is here");
e.printStackTrace();
return null;
public Class getColumnClass(int c) {return getValueAt(0, c).getClass(); }
public boolean isCellEditable(int row, int col) {
if (row == 1) { return false; } else { return true; }
public void setTableData( Vector mData)
this.m_vector = new Vector(mData);
fireTableStructureChanged();
}Please help me out.This is the exception:
java.lang.ArrayIndexOutOfBoundsException: 4 >= 3
at java.util.Vector.elementAt(Vector.java:431)
at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:277)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1047)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:974)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
at javax.swing.JComponent.paintComponent(JComponent.java:541)
at javax.swing.JComponent.paint(JComponent.java:808)
at javax.swing.JComponent.paintChildren(JComponent.java:647)
at javax.swing.JComponent.paint(JComponent.java:817)
at javax.swing.JViewport.paint(JViewport.java:722)
at javax.swing.JComponent.paintChildren(JComponent.java:647)
at javax.swing.JComponent.paint(JComponent.java:817)
at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4787)
at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4740)
at javax.swing.JComponent._paintImmediately(JComponent.java:4685)
at javax.swing.JComponent.paintImmediately(JComponent.java:4488)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:410)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:117)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)and Column may increase/decrease depending upon data retrieved. -
Urgent :problem with JTable on server program
hi all i am writing an internet cafe timer.there is a table with the following colums:PC Name,IP Address,Status,Time Left, Time Login. ,on the server GUI. Whenever a client connects,a new row having the clients details is added to the table model, which reflects on the table.but if a client disconnects and reconnects, i want it to search thru the rows in the model, if there is a row with its information already,it shouls simply update the status column to "Reconnected", and not add an entirly new row, but if there is no row with its information, it can then add a new row with its information.
Simply put, when a client connects,it should check
1)if the table is empty, add a new row;
2)else, check if tabe already has a row for the client, then update the row,else add a new row.
its not working this way.it only works for the first client to connect,if other clients connect and disconnect,it still adds a new row, instaed of updating.
the method doTable() in class ClientThread is what i use .please check it out and help me.
i have a thread for each client.when a client connects, the server starts the thread and passes an instance of the server ui to the thread, so the threads acess the tablemodel thru this instance.
Here is a simple run down of my classes
CafeServer.java
* @(#)CafeServer.java
* @author obinna
* @version 1.00 2007/3/10
import java.net.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import java.sql.*;
public class CafeServer {
int serverPort;
int serverLimit;
//ServerSocket serversocket;
private static int rownum = -1;
private static Connection conn;
private static CafeServerUI serverUI;
* Creates a new instance of <code>CafeServer</code>.
public CafeServer() {
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection("jdbc:odbc:cafetimer","","");
System.out.println("connection established with cafetimer database");
}catch(Exception ex){
JOptionPane.showMessageDialog(null,"Cannot find database");
serverUI = new CafeServerUI( this,conn );
public void closeServer(){
System.exit(0);
public static void main(String[] args) throws IOException{
// TODO code application logic here
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
new CafeServer();
catch(Exception ex){
JOptionPane.showMessageDialog(null,"Could Not Find System Look and Feel.\nDefault L&F Loaded.");
JFrame.setDefaultLookAndFeelDecorated(true);
ServerSocket serverSocket = null;
boolean listening = true;
try {
serverSocket = new ServerSocket(4444);
} catch (IOException e) {
System.err.println("Could not listen on port: 4444.");
System.exit(-1);
while (listening)
new ClientThread(serverSocket.accept(),serverUI,conn).start();
serverSocket.close();
CafeServerUI.java
//import statements.......................................
public class CafeServerUI extends JFrame{
public Vector pins = new Vector<String>();
public DefaultTableModel model;
public JTable table;
protected JTextArea msgarea;
protected JScrollPane scrpane;
protected JPanel mainp,northp,leftp,rightupp,rightp;
protected String[] colnames = {"Computer Name","IP Ad
.............................................................constrctor follows
ClientThread.java
import java.io.*;
import java.net.*;
import java.sql.*;
public class ClientThread extends Thread{
private Socket socket = null;
private String pin, timeleft, pin3,timeleft3,tleft;
private CafeServerUI csui = null;
private Ticket ticket;
private RemainingTime remtime;
private String hostname,ipadd;
private int rownum;
private Connection conn;
private Statement stmt;
private ResultSet rs;
private boolean found;
public ObjectOutputStream outputStream;
public ObjectInputStream inputStream;
private Admin admin;
boolean found2 = false;
//private String[] newrow = new String[5];
public ClientThread(Socket socket,CafeServerUI csui,Connection conn) {
super("Client Thread");
this.socket = socket;
this.csui = csui;
this.conn = conn;
try{
stmt = this.conn.createStatement();
}catch(Exception ex){
System.out.println(ex.getMessage() + " : " + ex);
//this.rownum = rownum;
hostname = this.socket.getInetAddress().getHostName();
ipadd = this.socket.getInetAddress().getHostAddress();
//sString[] newrow = {hostname,ipadd,"Connected","",""};
doTable();
//System.out.print("table row " + this.rownum);
this.csui.oos.addElement(ClientThread.this);
public void doTable(){
String[] newrow = {hostname,ipadd,"Connected","",""};
if(this.csui.model.getRowCount() == 0){
this.csui.model.addRow(newrow);
}else{
for(int i=0; i < this.csui.model.getRowCount(); i++ ){
String hname = (String)this.csui.model.getValueAt(i,0);
if(hname.equalsIgnoreCase(hostname)){
this.csui.model.setValueAt("Re Connected",i,2);
break;
}else{
this.csui.model.addRow(newrow);
break;
.....public void run()....In the UI is defined the InputMap/ActionMap pair to respond to keys. There is defined an action for ENTER. I have had the same problem, and the only thing that worked for me was to clear the actionMap, and reassign some keys to their original action, and some (e.g. ENTER, TAB) to my actions. This worked. With TAB is harder beacuse i guess it's deeper in the JVM implemented, but after a while i've managed to overwrite that too.
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