JTable in AWT ?
Hi Friends
In Swings we have JTable to Construct a Table.
Is there anything like that in AWT ??
Thanksinadvance
Yours
Rajesh
Hi
Thankyou VeryMuch
Now I am Converting Swing Applicatin to AWT Application
A small pblm is ..
In Swings we have DefaultCellEditor to Construct Tables and tree cells.
Is there any thing like that in AWT ??
Thanksinadvance
Your
Rajesh
hi,
no there is nothing like that, you have to do it for
your own.
a hint: do not mix awt with swing, this will only face
you with problems, which are hardly to handle
regards
Similar Messages
-
Java.awt.IllegalComponentStateException in JTable
Hi folks,
I am trying to write a JTable cell validation. Input data in a cell, if failure, prompt message and set focus & editing back to the cell. I've tried InputVerifier() but it doesn't work since I can easily use the mouse click to shift to other cells in the same table.
What I am trying to do now is to define my DefaultCellEditor. I record the row & index position when getting focus. In the lost focus event, do the validation and set the focus & editing back if failure. Seems it works fine. However, when I randomly click different cells in the table quickly. It prompts:
"java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location"
Here is my stack dump:
at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:1487)
at java.awt.Component.getLocationOnScreen(Component.java:1461)
at javax.swing.Autoscroller.mouseDragged(Autoscroller.java:79)
at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:2759)
at java.awt.Component.processEvent(Component.java:4822)
at java.awt.Container.processEvent(Container.java:1525)
at java.awt.Component.dispatchEventImpl(Component.java:3526)
at java.awt.Container.dispatchEventImpl(Container.java:1582)
at java.awt.Component.dispatchEvent(Component.java:3367)
at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.repostEvent(BasicTableUI.java:475)
at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mouseDragged(BasicTableUI.java:554)
at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:258)
at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:257)
at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:257)
at java.awt.Component.processMouseMotionEvent(Component.java:5069)
at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:2763)
at java.awt.Component.processEvent(Component.java:4822)
at java.awt.Container.processEvent(Container.java:1525)
at java.awt.Component.dispatchEventImpl(Component.java:3526)
at java.awt.Container.dispatchEventImpl(Container.java:1582)
at java.awt.Component.dispatchEvent(Component.java:3367)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3359)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3091)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3004)
at java.awt.Container.dispatchEventImpl(Container.java:1568)
at java.awt.Window.dispatchEventImpl(Window.java:1581)
at java.awt.Component.dispatchEvent(Component.java:3367)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:445)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:191)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)
Also, enclosed is my modified DefaultCellEditor class. Your input will be greatly appreicated. Thanks.
class NewDefaultCellEditor extends DefaultCellEditor {
public NewDefaultCellEditor(JTextField jTextField) {
super(jTextField);
this.setClickCountToStart(1);
jTextField.addFocusListener(new FocusAdapter() {
JTable tbl;
int row;
int column;
public void focusGained(FocusEvent e) {
tbl = (JTable)((JTextField)e.getSource()).getParent();
row = tbl.getEditingRow();
column = tbl.getEditingColumn();
public void focusLost(FocusEvent e) {
/*** Put validation here, execute the following if failed ***/
tbl.editCellAt(row, column);
((JTextField)e.getSource()).requestFocus();Your use in a JTable isn't too clear to me, but I feel you're overthinking the basic requirement:
I have an extended JComboBox which is meant to display its information only. Thus it
- does not allow any selection
- shows the first item of the list in the TextField only and not once more in the listI don't see the need for duplicating the model and using a popup menu listener.
import java.awt.Component;
import javax.swing.*;
public class DisplayOnlyComboBoxDemo {
public static void main(String[] args) throws Exception {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new DisplayOnlyComboBoxDemo().makeUI();
public void makeUI() {
JFrame frame = new JFrame();
frame.add(new DisplayOnlyComboBox("One", new String[]{"Two", "Three", "Four", "Five"}));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
class DisplayOnlyComboBox extends JComboBox {
private String firstItem;
public DisplayOnlyComboBox(String firstItem, String[] items) {
super(items);
this.firstItem = firstItem;
setRenderer(new DefaultListCellRenderer() {
@Override
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
if (index == -1) {
setText(DisplayOnlyComboBox.this.firstItem);
return this;
}db -
Trying to add a java.awt.Choice object to a JTable
Hi
I am creating an app. which uses a JTable as the front end, displaying string data in all cells except the first column, which I need to make java.awt.Choice objects (or equivalent) - users will click the cell, a list of job numbers will be displayed and they click the one they want.
Every time I run the app instead of a drop down list of job numbers I get the text:
java.awt.Choice[choice0,0,0,0x0,invalid,current=K5000]
I am unsure how to proceed.
Any and all help appreciated - for reference my code at present is:
Choice jobNumber = new Choice();
jobNumber.addItem("K5000");
Object[][] dataValues = {
{jobNumbers[0], "A job title", new Integer(0), new Integer(0), new Integer(8), new Integer(8), new Integer(4), new Integer(0), new Integer(0)},
where the JTable constructor is passed this array
regards
DavidDon't mix Swing and AWT!! Have a look at the JTable tutorial on this site.
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#combobox -
JTable Awt -Event Queue problem
Hi
I've been looking everywhere for a solution to this, but can't seem to find one. I've got a JTable with an underlying model that is being continuously updated (every 100ms or so). Whenever I try to sort the JTable using TableRowSorter while the model is being added to I get
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.Vector.elementAt(Vector.java:430)
at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:277)
I don't understand this as in my custom table model I've added the fireTableChanged etc. in a SwingUtilities.invokeLater( ...) thread.
Has anyone else encountered this problem and found a solution? I'd be really grateful!
ThanksHi
Thanks for responding, I'm still a little confused. I've posted the code below for both the JTable and the TableModel. The tablemodel simply gets values from a vector which is being dynamically updated from outside the table - but whenever the vector is added to
The problem seems to only occur when I press the column header to sort the tables during the updates. My understanding is that the method refresh() should create a threadsafe update of the table - but somehow it refreshes the binding to the tablemodel and during this time the table returns a defaulttablemodel that doesn't correspond to the actual underlying data....I thought this kind of problem would be solved by invoking all updates on the swing event thread, but it seems to still produce the effect and I'm stumped!!
(The data is in an array called turns, and the addElement() in another class calls the refresh() method)
many thanks, in the hope that someone has the kindness and and benevolence to wade through the following code!
public class JContiguousTurnsListTable extends JTable {
private JContiguousTurnsListTableModel jctltm;
public JContiguousTurnsListTable(Conversation c) {
super();
jctltm = new JContiguousTurnsListTableModel(this,c);
this.setModel(jctltm);
setSize();
//this.setAutoResizeMode(AUTO_RESIZE_ALL_COLUMNS);
//this.setAutoCreateRowSorter(true);
TableRowSorter <TableModel> sorter = new TableRowSorter <TableModel>(jctltm);
//sorter.setSortsOnUpdates(true);
this.setRowSorter(sorter);
System.err.println("Setting up ");
private void setSize(){
TableColumn column = null;
for (int i = 0; i <11; i++) {
column = this.getColumnModel().getColumn(i);
if(i==1||i==2||i==3||i==4||i==8||i==9){
column.setPreferredWidth(50);
else if (i==0||i==5){
column.setPreferredWidth(180);
else if (i == 6) {
column.setPreferredWidth(150);
else if(i==10){
column.setPreferredWidth(250);
else
column.setPreferredWidth(100);
//column.setPreferredWidth(100);
//column.setMinWidth(100);
//column.setMaxWidth(100);
public String getColumnName(int column){
return jctltm.getColumnName(column);
public void refresh(){
this.jctltm.refresh();
----------------And the table model:
public class JContiguousTurnsListTableModel extends AbstractTableModel {
private Conversation c;
public JContiguousTurnsListTableModel(JTable jt,Conversation c) {
super();
this.c=c;
public void refresh(){
//System.out.println("Refresh");
SwingUtilities.invokeLater(new Runnable(){public void run(){fireTableDataChanged();fireTableStructureChanged();} });
public boolean isCellEditable(int x, int y){
return false;
public String getColumnName(int column){
if(column==0){
return "Sender";
else if(column==1){
return "Onset";
else if (column==2){
return "Enter";
else if(column ==3){
return "E - O";
else if(column ==4){
return "Speed";
else if(column ==5){
return "Spoof Orig.";
else if(column ==6){
return "Text";
else if(column ==7){
return "Recipients";
else if(column ==8){
return "Blocked";
else if(column ==9){
return "Dels";
else if(column ==10){
return "TaggedText";
else if(column ==11){
return "ContgNo";
else if(column ==12){
return "Inconcistency";
else{
return " ";
public Object getValueAt(int x, int y){
try{
//System.out.println("GET VALUE AT "+x+" "+y);
Vector turns = c.getContiguousTurns();
if(x>=turns.size())return " ";
ContiguousTurn t = (ContiguousTurn)turns.elementAt(x);
if(y==0){
return t.getSender().getUsername();
else if(y==1){
return t.getTypingOnset();
else if(y==2){
return t.getTypingReturnPressed();
else if(y==3){
return t.getTypingReturnPressed()-t.getTypingOnset();
else if(y==4){
long typingtime = t.getTypingReturnPressed()-t.getTypingOnset();
if(typingtime<=0)return 0;
return ((long)t.getTextString().length())/typingtime;
else if(y==5){
return t.getApparentSender().getUsername();
else if(y==6){
return t.getTextString();
else if(y==7){
//System.out.println("GETTINGRECIP1");
Vector v = t.getRecipients();
String names ="";
// System.out.println("GETTINGRECIP3");
for(int i=0;i<v.size();i++){
Conversant c = (Conversant)v.elementAt(i);
// System.out.println("GETTINGRECIP4");
names = names+", "+c.getUsername();
// System.out.println("GETTINGRECIP5");
return names;
else if (y==8){
if (t.getTypingWasBlockedDuringTyping())return "BLOCKED";
return "OK";
else if(y==9){
return t.getNumberOfDeletes();
else if(y==10){
String returnText="";
Vector v = t.getWordsAsLexicalEntries();
for(int i=0;i<v.size();i++){
LexiconEntry lxe= (LexiconEntry)v.elementAt(i);
returnText = returnText+lxe.getWord()+" ("+lxe.getPartOfSpeech()+") ";
return returnText;
else if(y==11){
return t.getNumberOfTurns();
else if(y==12){
// System.out.println("CONTIGUOUS1");
String value ="";
boolean hasSameRecipients = t.getTurnsHaveSameRecipients();
boolean hasSameApparentOrigin = t.getTurnsHaveSameApparentOrigin();
if (hasSameRecipients&hasSameApparentOrigin){
value = "OK";
else if (hasSameRecipients&!hasSameApparentOrigin){
value = "Diff. O";
else if(!hasSameRecipients&hasSameApparentOrigin){
value = "Diff. Recip";
else {
value = "Diff O&R";
//System.out.println("CONTIGUOUS2");
return value;
return " ";
}catch (Exception e){
return "UI ERROR";
public Class getColumnClass(int column) {
Class returnValue;
if ((column >= 0) && (column < getColumnCount())) {
returnValue = getValueAt(0, column).getClass();
} else {
returnValue = Object.class;
return returnValue;
public int getRowCount(){
return this.c.getContiguousTurns().size();
public int getColumnCount(){
return 13;
} -
How to select a specific cell in a JTable?
Hi there,
in a JTable, I would like to select a specific cell (to highlight it) from a JButton.
Here a sample code...
Who could help me to fill it?
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
public class TableSelection{
public static void main (String args[]) {
JFrame frame = new MyFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
class MyFrame extends JFrame{
public MyFrame(){
setTitle("TableSelection");
setSize(WIDTH,HEIGHT);
DefaultTableModel myModel = new DefaultTableModel(2,2);
JTable myTable = new JTable(myModel);
myTable.setCellSelectionEnabled(true);
JButton button00 = new JButton("select 0,0");
button00.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
System.out.println("selection of cell (0,0)");
//--- what code is required to select the cell(0,0)?
JButton button11 = new JButton("select 1,1");
button11.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
System.out.println("selection of cell (1,1)");
//--- what code is required to select the cell(1,1)?
Box myBox = new Box(BoxLayout.Y_AXIS);
myBox.add(new JScrollPane(myTable));
myBox.add(button00);
myBox.add(button11);
getContentPane().add(myBox, BorderLayout.CENTER);
private static final int WIDTH=200;
private static final int HEIGHT=200;
}Thanks a lot for your help.
DenisUse the addColumnSelectionInterval(int index1, int index2)method ~ http://java.sun.com/j2se/1.4/docs/api/javax/swing/JTable.html#addColumnSelectionInterval(int,%20int)
and the addRowSelectionInterval(int index1, int index2) method ~ http://java.sun.com/j2se/1.4/docs/api/javax/swing/JTable.html#addRowSelectionInterval(int,%20int)
Hope that helped.
afotoglidis -
Create a JTable based on an ArrayList containing instances of a class.
I have a class, IncomeBudgetItem, instances of which are contained in an ArrayList. I would like to create a JTable, based on this ArrayList. One variable is a string, while others are type double. Not all variables are to appear in the JTable.
The internal logic of my program is already working. And my GUI is largely constructed. I'm just not sure how to make them talk to each other. The actually creation of the JTable is my biggest problem right now.import java.awt.Dimension;
import java.awt.GridLayout;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class TableDemo extends JPanel {
private boolean DEBUG = false;
public TableDemo() {
super(new GridLayout(1, 0));
ArrayList<MyObject> list = new ArrayList<MyObject>();
list.add(new MyObject("Kathy", "Smith", "Snowboarding", new Integer(5),
new Boolean(false)));
list.add(new MyObject("John", "Doe", "Rowing", new Integer(3),
new Boolean(true)));
list.add(new MyObject("Sue", "Black", "Knitting", new Integer(2),
new Boolean(false)));
list.add(new MyObject("Jane", "White", "Speed reading",
new Integer(20), new Boolean(true)));
JTable table = new JTable(new MyTableModel(list));
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
// Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
// Add the scroll pane to this panel.
add(scrollPane);
class MyObject {
String firstName;
String lastName;
String sport;
int years;
boolean isVeg;
MyObject(String firstName, String lastName, String sport, int years,
boolean isVeg) {
this.firstName = firstName;
this.lastName = lastName;
this.sport = sport;
this.years = years;
this.isVeg = isVeg;
class MyTableModel extends AbstractTableModel {
private String[] columnNames = { "First Name", "Last Name", "Sport",
"# of Years", "Vegetarian" };
ArrayList<MyObject> list = null;
MyTableModel(ArrayList<MyObject> list) {
this.list = list;
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return list.size();
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
MyObject object = list.get(row);
switch (col) {
case 0:
return object.firstName;
case 1:
return object.lastName;
case 2:
return object.sport;
case 3:
return object.years;
case 4:
return object.isVeg;
default:
return "unknown";
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
private static void createAndShowGUI() {
// Create and set up the window.
JFrame frame = new JFrame("TableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
TableDemo newContentPane = new TableDemo();
newContentPane.setOpaque(true); // content panes must be opaque
frame.setContentPane(newContentPane);
// Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
} -
Error in updating Jtable Database
package desktopapplication1; import java.util.*; import java.sql.*; import javax.swing.JOptionPane; import javax.swing.table.*; public class Datab extends DefaultTableModel { private Connection conn; private Statement st; private ResultSet rs; private ResultSetMetaData rsmd; private int rows; public Datab(String driver, String url, String query) throws SQLException, ClassNotFoundException { Class.forName(driver); conn = DriverManager.getConnection(url); st = conn.createStatement(rs.TYPE_SCROLL_SENSITIVE,rs.CONCUR_UPDATABLE); if ( query.substring(0,3).equalsIgnoreCase("INS") ) { st.executeUpdate(query); } else if ( query.substring(0,3).equalsIgnoreCase("DEL") ) { st.executeUpdate(query); } else { rs = st.executeQuery(query); rsmd = rs.getMetaData(); rs.last(); rows = rs.getRow(); } fireTableStructureChanged(); } public String getColumnName(int column){ try{ return rsmd.getColumnName(column+1); }catch(Exception e){ e.printStackTrace(); } return ""; } public int getColumnCount(){ try{ return rsmd.getColumnCount(); }catch(Exception e){ e.printStackTrace(); } return 0; } public int getRowCount(){ try{ return rows; }catch(Exception e){ e.printStackTrace(); } return 0; } public Object getValueAt(int row, int column){ try{ rs.absolute(row+1); return rs.getObject(column+1); }catch(Exception e){ e.printStackTrace(); } return ""; } public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } public boolean isCellEditable(int row, int column) { if (column < 0) { return false; } else { return true; } } public void setValueAt(Object value, int row, int column){ try{ int conf = JOptionPane.showConfirmDialog(null,"You wanna reaplace "+getValueAt(row,column)+" with "+value+"?", null, 2); if ( conf == 0 ) { rs.absolute(row+1); System.out.println("ROW = "+row+"CURSOR = "+(row+1)+""+rs.getString(1)+column); rs.updateString("Recipe","test"); //i tried to use a simple update cause the normal was not running but same error+ rs.updateRow(); }else { System.out.println("0"); } }catch(SQLException sqle){ System.err.println("Error setting value at row "+row+" column "+column+" with value "+value); sqle.printStackTrace(); } } }
hi, when i click on my table to edit a value, it give me an error and sometimes fill the cell with a value like [B@341j0j
Error setting value at row 1 column 0 with value soup2
java.sql.SQLException: [Microsoft][Driver ODBC Microsoft Access]Error in row
at sun.jdbc.odbc.JdbcOdbcResultSet.setPos(JdbcOdbcResultSet.java:5271)
at sun.jdbc.odbc.JdbcOdbcResultSet.updateRow(JdbcOdbcResultSet.java:4171)
at desktopapplication1.Datab.setValueAt(Datab.java:104)
at javax.swing.JTable.setValueAt(JTable.java:2719)
at javax.swing.JTable.editingStopped(JTable.java:4721)
at javax.swing.AbstractCellEditor.fireEditingStopped(AbstractCellEditor.java:125)
at javax.swing.DefaultCellEditor$EditorDelegate.stopCellEditing(DefaultCellEditor.java:350)
at javax.swing.DefaultCellEditor.stopCellEditing(DefaultCellEditor.java:215)
at javax.swing.JTable$GenericEditor.stopCellEditing(JTable.java:5475)
at javax.swing.DefaultCellEditor$EditorDelegate.actionPerformed(DefaultCellEditor.java:367)
at javax.swing.JTextField.fireActionPerformed(JTextField.java:492)
at javax.swing.JTextField.postActionEvent(JTextField.java:705)
at javax.swing.JTextField$NotifyAction.actionPerformed(JTextField.java:820)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
at java.awt.Component.processEvent(Component.java:6040)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:704)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:969)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:841)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:668)
at java.awt.Component.dispatchEventImpl(Component.java:4502)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
my db is like
RecipeName intvalue1 intvalue2 intvalue3 stringvalue4
soup 3 2 11 fish
chocolate 3 2 44 dessert
Edited by: kainard on Aug 1, 2010 2:31 PM
Edited by: kainard on Aug 1, 2010 2:37 PMCan you explain why you declare
private Connection conn;
private Statement st;
private ResultSet rs;
private ResultSetMetaData rsmd;
as private -
URGENT HELP NEEDED FOR JTABLE PROBLEM!!!!!!!!!!!!!!!!!
firstly i made a jtable to adds and deletes rows and passes the the data to the table model from some textfields. then i wanted to add a tablemoselistener method in order to change the value in the columns 1,2,3,4 and set the result of them in the column 5. when i added that portion of code the buttons that added and deleted rows had problems to function correctly..they dont work at all..can somebody have a look in my code and see wot is wrong..thanx in advance..
below follows the code..sorry for the mesh of the code..you can use and run the code and notice the problem when you press the add button..also if you want delete the TableChanged method to see that the add button works perfect.
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.io.*;
public class NodesTable extends JFrame implements TableModelListener, ActionListener {
JTable jt;
DefaultTableColumnModel dtcm;
TableColumn column[] = new TableColumn[100];
DefaultTableModel dtm;
JLabel Name,m1,w1,m2,w2;
JTextField NameTF,m1TF,w1TF,m2TF,w2TF;
String c [] ={ "Name", "Assessment1", "Weight1" , "Assessment2","Weight2 ","TotalMark"};
float x=0,y=0,tMark=0,z = 0;
float j=0;
int i;
JButton DelButton;
JButton AddButton;
JScrollPane scrollPane;
JPanel mainPanel,buttonPanel;
JFrame frame;
Object[][] data =
{"tami", new Float(1), new Float(1.11), new Float(1.11),new Float(1),new Float(1)},
{"tami", new Float(1), new Float(2.22), new Float(2.22),new Float(1),new Float(1)},
{"petros", new Float(1), new Float(3.33), new Float(3.33),new Float(1),new Float(1)},
{"petros", new Float(1), new Float(4.44), new Float(4.44),new Float(1),new Float(1)}
public NodesTable() {
super("Student Marking Spreadsheet");
this.AddNodesintoTable();
setSize(400,250);
setVisible(true);
public void AddNodesintoTable(){
// Create a vector object and load them with the data
// to be placed on each row of the table
dtm = new DefaultTableModel(data,c);
dtm.addTableModelListener( this );
jt = new JTable(dtm){
// 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)
int modelColumn = convertColumnIndexToModel( column );
return (modelColumn == 5) ? false : true;
//****************************User Input**************************
//Add another node
//Creating and setting the properties
//of the panel's component (panels and textfields)
Name = new JLabel("Name");
Name.setForeground(Color.black);
m1 = new JLabel("Mark1");
m1.setForeground(Color.black);
w1 = new JLabel("Weigth1");
w1.setForeground(Color.black);
m2= new JLabel("Mark2");
m2.setForeground(Color.black);
w2 = new JLabel("Weight2");
w2.setForeground(Color.black);
NameTF = new JTextField(5);
NameTF.setText("Node");
m1TF = new JTextField(5);
w1TF = new JTextField(5);
m2TF=new JTextField(5);
w2TF=new JTextField(5);
//creating the buttons
JPanel buttonPanel = new JPanel();
AddButton=new JButton("Add Row");
DelButton=new JButton("Delete") ;
buttonPanel.add(AddButton);
buttonPanel.add(DelButton);
//adding the components to the panel
JPanel inputpanel = new JPanel();
inputpanel.add(Name);
inputpanel.add(NameTF);
inputpanel.add(m1);
inputpanel.add(m1TF);
inputpanel.add(w1);
inputpanel.add(w1TF);
inputpanel.add(m2);
inputpanel.add(m2TF);
inputpanel.add(w2TF);
inputpanel.add(w2);
inputpanel.add(AddButton);
inputpanel.add(DelButton);
//creating the panel and setting its properties
JPanel tablepanel = new JPanel();
tablepanel.add(new JScrollPane(jt, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED
, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
getContentPane().add(tablepanel, BorderLayout.CENTER);
getContentPane().add(inputpanel, BorderLayout.SOUTH);
//Method to add row for each new entry
public void addRow()
Vector r=new Vector();
r=createBlankElement();
dtm.addRow(r);
jt.addNotify();
public Vector createBlankElement()
Vector t = new Vector();
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
return t;
// Method to delete a row from the spreadsheet
void deleteRow(int index)
if(index!=-1) //At least one Row in Table
dtm.removeRow(index);
jt.addNotify();
// Method that adds and deletes rows
// from the table by pressing the
//corresponding buttons
public void actionPerformed(ActionEvent ae){
Float z=new Float (m2TF.getText());
String Name= NameTF.getText();
Float x= new Float(m1TF.getText());
Float y= new Float(w1TF.getText());
Float j=new Float (w2TF.getText());
JFileChooser jfc2 = new JFileChooser();
String newdata[]= {Name,String.valueOf(x),String.valueOf(y),
String.valueOf(z),String.valueOf(j)};
Object source = ae.getSource();
if(ae.getSource() == (JButton)AddButton)
addRow();
if (ae.getSource() ==(JButton) DelButton)
deleteRow(jt.getSelectedRow());
//method to calculate the total mark in the TotalMark column
//that updates the values in every other column
//It takes the values from the column 1,2,3,4
//and changes the value in the column 5
public void tableChanged(TableModelEvent e) {
System.out.println(e.getSource());
if (e.getType() == TableModelEvent.UPDATE)
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 1 || column == 2 ||column == 3 ||column == 4)
TableModel model = jt.getModel();
float q= ((Float)model.getValueAt(row,1)).floatValue();
float w= ((Float)model.getValueAt(row,2)).floatValue();
float t= ((Float)model.getValueAt(row,3)).floatValue();
float r= ((Float)model.getValueAt(row,4)).floatValue();
Float tMark = new Float((q*w+t*r)/(w+r) );
model.setValueAt(tMark, row, 5);
// Which cells are editable.
// It is only necessary to implement this method
// if the table is editable
public boolean isCellEditable(int row, int col)
{ return true; //All cells are editable
public static void main(String[] args) {
NodesTable t=new NodesTable();
}There are too many mistakes in your program. It looks like you are new to java.
Your add and delete row buttons are not working because you haven't registered your action listener with these buttons.
I have modifide your code and now it works fine. Just put some validation code for the textboxes becuase it throws exception when user presses add button without entering anything.
Here is the updated code: Do the diff and u will know my changes
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to Window -
* Preferences - Java - Code Style - Code Templates
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
public class NodesTable extends JFrame implements TableModelListener,
ActionListener {
JTable jt;
DefaultTableColumnModel dtcm;
TableColumn column[] = new TableColumn[100];
DefaultTableModel dtm;
JLabel Name, m1, w1, m2, w2;
JTextField NameTF, m1TF, w1TF, m2TF, w2TF;
String c[] = { "Name", "Assessment1", "Weight1", "Assessment2", "Weight2 ",
"TotalMark" };
float x = 0, y = 0, tMark = 0, z = 0;
float j = 0;
int i;
JButton DelButton;
JButton AddButton;
JScrollPane scrollPane;
JPanel mainPanel, buttonPanel;
JFrame frame;
public NodesTable() {
super("Student Marking Spreadsheet");
this.AddNodesintoTable();
setSize(400, 250);
setVisible(true);
public void AddNodesintoTable() {
// Create a vector object and load them with the data
// to be placed on each row of the table
dtm = new DefaultTableModel(c,0);
dtm.addTableModelListener(this);
jt = new JTable(dtm) {
// The Cost is not editable
public boolean isCellEditable(int row, int column) {
int modelColumn = convertColumnIndexToModel(column);
return (modelColumn == 5) ? false : true;
//****************************User Input**************************
//Add another node
//Creating and setting the properties
//of the panel's component (panels and textfields)
Name = new JLabel("Name");
Name.setForeground(Color.black);
m1 = new JLabel("Mark1");
m1.setForeground(Color.black);
w1 = new JLabel("Weigth1");
w1.setForeground(Color.black);
m2 = new JLabel("Mark2");
m2.setForeground(Color.black);
w2 = new JLabel("Weight2");
w2.setForeground(Color.black);
NameTF = new JTextField(5);
NameTF.setText("Node");
m1TF = new JTextField(5);
w1TF = new JTextField(5);
m2TF = new JTextField(5);
w2TF = new JTextField(5);
//creating the buttons
JPanel buttonPanel = new JPanel();
AddButton = new JButton("Add Row");
AddButton.addActionListener(this);
DelButton = new JButton("Delete");
DelButton.addActionListener(this);
buttonPanel.add(AddButton);
buttonPanel.add(DelButton);
//adding the components to the panel
JPanel inputpanel = new JPanel();
inputpanel.add(Name);
inputpanel.add(NameTF);
inputpanel.add(m1);
inputpanel.add(m1TF);
inputpanel.add(w1);
inputpanel.add(w1TF);
inputpanel.add(m2);
inputpanel.add(m2TF);
inputpanel.add(w2TF);
inputpanel.add(w2);
inputpanel.add(AddButton);
inputpanel.add(DelButton);
//creating the panel and setting its properties
JPanel tablepanel = new JPanel();
tablepanel.add(new JScrollPane(jt,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
getContentPane().add(tablepanel, BorderLayout.CENTER);
getContentPane().add(inputpanel, BorderLayout.SOUTH);
//Method to add row for each new entry
public void addRow() {
Float z = new Float(m2TF.getText());
String Name = NameTF.getText();
Float x = new Float(m1TF.getText());
Float y = new Float(w1TF.getText());
Float j = new Float(w2TF.getText());
String newdata[] = { Name, String.valueOf(x), String.valueOf(y),
String.valueOf(z), String.valueOf(j) };
dtm.addRow(newdata);
// Method to delete a row from the spreadsheet
void deleteRow(int index) {
if (index != -1) //At least one Row in Table
dtm.removeRow(index);
jt.addNotify();
// Method that adds and deletes rows
// from the table by pressing the
//corresponding buttons
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (ae.getSource() == (JButton) AddButton) {
addRow();
if (ae.getSource() == (JButton) DelButton) {
deleteRow(jt.getSelectedRow());
//method to calculate the total mark in the TotalMark column
//that updates the values in every other column
//It takes the values from the column 1,2,3,4
//and changes the value in the column 5
public void tableChanged(TableModelEvent e) {
System.out.println(e.getSource());
//if (e.getType() == TableModelEvent.UPDATE) {
int row = e.getFirstRow();
int column = e.getColumn();
if (column == 1 || column == 2 || column == 3 || column == 4) {
TableModel model = jt.getModel();
float q = (new Float(model.getValueAt(row, 1).toString())).floatValue();
float w = (new Float(model.getValueAt(row, 2).toString())).floatValue();
float t = (new Float(model.getValueAt(row, 3).toString())).floatValue();
float r = (new Float(model.getValueAt(row, 4).toString())).floatValue();
Float tMark = new Float((q * w + t * r) / (w + r));
model.setValueAt(tMark, row, 5);
// Which cells are editable.
// It is only necessary to implement this method
// if the table is editable
public boolean isCellEditable(int row, int col) {
return true; //All cells are editable
public static void main(String[] args) {
NodesTable t = new NodesTable();
} -
I am trying to display data from database into the JTable swing component. I can see the table and the heading coming from the vector. I cannot see why the data from the databse table is not loaded on to the Jtable. I just get a table with 6 rows blank.
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.sql.*;
import java.util.*;
public class dataTable extends JApplet
String dbdriver="jdbc:oracle:thin:@ds1.ctateu.edu:1521:wpac";
String dbuser="system";
String dbpass="pass";
Container c;
JScrollPane jsp;
JTable table;
int v,h;
Connection connection;
Statement stmt;
ResultSet rs;
String param_start,param_end, param_disp_start, param_disp_end,param_shortdesc, param_longdesc;
public void init()
c= getContentPane();
c.setLayout (new BorderLayout());
v=ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS;
h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS;
Vector heading = new Vector();
heading.addElement("Event Start Date");
heading.addElement("Event End Date");
heading.addElement("Display Start Date");
heading.addElement("Display End Date");
heading.addElement("Short Description");
heading.addElement("Long Description");
Vector data = new Vector();
try
Class.forName("oracle.jdbc.driver.OracleDriver");
connection=DriverManager.getConnection(dbdriver,dbuser,dbpass);
stmt=connection.createStatement();
rs= stmt.executeQuery("select * from univevents");
while(rs.next())
param_start = rs.getString("start_date");
param_end = rs.getString("end_date");
param_disp_start = rs.getString("display_start");
param_disp_end =rs.getString("display_end");
param_shortdesc = rs.getString("short_desc");
param_longdesc = rs.getString("long_desc");
catch (Exception e)
//JOptionPane.showMessageDialogue("Exception: "+e.getMessage());
data.addElement(param_start);
data.addElement(param_end);
data.addElement(param_disp_start);
data.addElement(param_disp_end);
data.addElement(param_shortdesc);
data.addElement(param_longdesc);
table = new JTable(data, heading);
jsp = new JScrollPane(table,v,h);
//Add scrollpane to container
c.add("Center",jsp);
}//init
}//JAppletYour data vector should be a Vector of Vectors.
I think you need to change your loop to look something like this:
while(rs.next())
Vector row = new Vector();
row.addElement( rs.getString("start_date") );
row.addElement( rs.getString("end_date") );
row.addElement( rs.getString("display_start") );
row.addElement( rs.getString("display_end") );
row.addElement( rs.getString("short_desc") );
row.addElement( rs.getString("long_desc") );
data.addElement( row );
} Then remove your data.addElement() statements found outside the loop. -
Refresh jTable after inserting new data into the Database
Hey all,
I'm using Netbeans 6.5 to create a Desktop Application which is connected to a Java DB (Derby).
The first simple steps were all very successfull:
Create the jTable and bind it to the Database => everything works fine. When the application starts it correctly shows all data from the database.
The problem starts when I try to insert new data to the database.
For that reason I've created textfields and a button "Save". When I press the button it successfully inserts the data to the database but they are not displayed in the jTable (when the application starts they are all there, they are not updated at runtime) . I've tried table.invalidate() and table.repaint() but they just don't work.
Any help will be GREATLY appreciated. But please have in mind that most of the code is Netbeans-generated and most of it not editable.
Many thanks in advance.
GeorgeOnce again you are right my friend. I jumped to conclusion way too fast, when I shouldn't. (Give me a break, I've been busting my head with this well over a week). The response I saw when I did that was that indeed a line is added to the jTable. Because I falsly set the index of the object to be added to be second to last the row appeared on the table, what I didn't see at the time was that the last one disappeared. Hmm...
A new adventure begins...
So after a few hours of messing around with it here are my observations:
1) It was not an observable list. When I add the new element with employeesList.add(newEmp); , the table gets notified but a get a bunch of exceptions:
xception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 84, Size: 84
at java.util.ArrayList.RangeCheck(ArrayList.java:546)
at java.util.ArrayList.get(ArrayList.java:321)
at org.jdesktop.swingbinding.impl.ListBindingManager$ColumnDescriptionManager.validateBinding(ListBindingManager.java:191)
at org.jdesktop.swingbinding.impl.ListBindingManager.valueAt(ListBindingManager.java:99)
at org.jdesktop.swingbinding.JTableBinding$BindingTableModel.getValueAt(JTableBinding.java:713)
at javax.swing.JTable.getValueAt(JTable.java:1903)
at javax.swing.JTable.prepareRenderer(JTable.java:3911)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1897)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:154)
at javax.swing.JComponent.paintComponent(JComponent.java:743)
at javax.swing.JComponent.paint(JComponent.java:1006)
at javax.swing.JViewport.blitDoubleBuffered(JViewport.java:1602)
at javax.swing.JViewport.windowBlitPaint(JViewport.java:1568)
at javax.swing.JViewport.setViewPosition(JViewport.java:1098)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.vsbStateChanged(BasicScrollPaneUI.java:818)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.stateChanged(BasicScrollPaneUI.java:807)
at javax.swing.DefaultBoundedRangeModel.fireStateChanged(DefaultBoundedRangeModel.java:348)
at javax.swing.DefaultBoundedRangeModel.setRangeProperties(DefaultBoundedRangeModel.java:285)
at javax.swing.DefaultBoundedRangeModel.setValue(DefaultBoundedRangeModel.java:151)
at javax.swing.JScrollBar.setValue(JScrollBar.java:441)
at javax.swing.plaf.basic.BasicScrollBarUI.scrollByUnits(BasicScrollBarUI.java:907)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.mouseWheelMoved(BasicScrollPaneUI.java:778)
at javax.swing.plaf.basic.BasicScrollPaneUI$MouseWheelHandler.mouseWheelMoved(BasicScrollPaneUI.java:449)
at apple.laf.CUIAquaScrollPane$XYMouseWheelHandler.mouseWheelMoved(CUIAquaScrollPane.java:38)
at java.awt.Component.processMouseWheelEvent(Component.java:5690)
at java.awt.Component.processEvent(Component.java:5374)
at java.awt.Container.processEvent(Container.java:2010)
at java.awt.Component.dispatchEventImpl(Component.java:4068)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchMouseWheelToAncestor(Component.java:4211)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
at java.awt.Container.dispatchEventImpl(Container.java:2054)
at java.awt.Window.dispatchEventImpl(Window.java:1801)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 84, Size: 84
at java.util.ArrayList.RangeCheck(ArrayList.java:546)
at java.util.ArrayList.get(ArrayList.java:321)
at org.jdesktop.swingbinding.impl.ListBindingManager$ColumnDescriptionManager.validateBinding(ListBindingManager.java:191)
at org.jdesktop.swingbinding.impl.ListBindingManager.valueAt(ListBindingManager.java:99)
at org.jdesktop.swingbinding.JTableBinding$BindingTableModel.getValueAt(JTableBinding.java:713)
at javax.swing.JTable.getValueAt(JTable.java:1903)
at javax.swing.JTable.prepareRenderer(JTable.java:3911)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
... and a lot morewhich from my poor understanding means that the jTable succesfully notices the change but it is not able (??) to adjust to the new change. What is more interesting is that when I plainly add the element to the end of the list (without an idex that is), a blank row appears at the end of my Table. The weird thing is that I've bound the table to some text fields below it, and when I select that empty row all the data appear correctly to the text fields.
I tried going through:
org.jdesktop.observablecollections.ObservableCollections.observableList(employeesList).add(newEmp);as well as
help = org.jdesktop.observablecollections.ObservableCollections.observableListHelper(employeesList);
help.getObservableList().add(newEmp);
help.fireElementChanged(employeesList.lastIndexOf(newEmp));and
obsemployeesList = org.jdesktop.observablecollections.ObservableCollections.observableList(employeesList);
obsemployeesList.add(newEmp);and I still get the same results (both the exeptions and the mysterious empty row at the end of the table
So, I'm again in terrible need of your advice. I can't thank you enough for the effort you put into this.
Best regards,
George
Edited by: tougeo on May 30, 2009 11:06 AM
Edited by: tougeo on May 30, 2009 11:21 AM
Edited by: tougeo on May 30, 2009 11:30 AM -
To refresh the contents in JTextArea on selection of a row in JTable.
This is the block of code that i have tried :
import java.awt.GridBagConstraints;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
import ui.layouts.ComponentsBox;
import ui.layouts.GridPanel;
import ui.layouts.LayoutConstants;
import util.ui.UIUtil;
public class ElectronicJournal extends GridPanel {
private boolean DEBUG = false;
private boolean ALLOW_COLUMN_SELECTION = false;
private boolean ALLOW_ROW_SELECTION = true;
private GridPanel jGPanel = new GridPanel();
private GridPanel jGPanel1 = new GridPanel();
private GridPanel jGPanel2 = new GridPanel();
DefaultTableModel model;
private JLabel jLblTillNo = UIUtil.getHeaderLabel("TillNo :");
private JLabel jLblTillNoData = UIUtil.getBodyLabel("TILL123");
private JLabel jLblData = UIUtil.getBodyLabel("Detailed View");
private JTextArea textArea = new JTextArea();
private JScrollPane spTimeEntryView = new JScrollPane();
private JScrollPane pan = new JScrollPane();
String html= " Item Description: Price Change \n Old Price: 40.00 \n New Price: 50.00 \n Authorized By:USER1123 \n";
private JButton jBtnExporttoExcel = UIUtil.getButton(85,
"Export to Excel - F2", "");
final String[] colHeads = { "Task No", "Data", "User ID", "Date Time",
"Description" };
final Object[][] data = {
{ "1", "50.00", "USER123", "12/10/2006 05:30", "Price Change" },
{ "2", "100.00", "USER234", "15/10/2006 03:30", "Price Change12345"},
final String[] colHeads1 = {"Detailed View" };
final Object[][] data1 = {
{ "Task:Price Change", "\n"," Old Price:50.00"," \n ","New Price:100.00"," \n" }
JTable jtblTimeEntry = new JTable(data, colHeads);
JTable jTbl1 = new JTable(data1,colHeads1);
ComponentsBox jpBoxButton = new ComponentsBox(LayoutConstants.X_AXIS);
public ElectronicJournal() {
super();
jtblTimeEntry.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
if (ALLOW_ROW_SELECTION) { // true by default
ListSelectionModel rowSM = jtblTimeEntry.getSelectionModel();
rowSM.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
//Ignore extra messages.
if (e.getValueIsAdjusting()) return;
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
if (lsm.isSelectionEmpty()) {
System.out.println("No rows are selected.");
} else {
int selectedRow = lsm.getMinSelectionIndex();
System.out.println("Row " + selectedRow
+ " is now selected.");
textArea.append("asd \n 123 \n");
} else {
jtblTimeEntry.setRowSelectionAllowed(false);
if (DEBUG) {
jtblTimeEntry.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
printDebugData(jtblTimeEntry);
initialize();
private void printDebugData(JTable table) {
int numRows = table.getRowCount();
int numCols = table.getColumnCount();
javax.swing.table.TableModel model = table.getModel();
System.out.println("Value of data: ");
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + model.getValueAt(i, j));
System.out.println();
System.out.println("--------------------------");
private void initialize() {
this.setSize(680, 200);
this.setBackground(java.awt.SystemColor.control);
jBtnExporttoExcel.setBackground(SystemColor.control);
ComponentsBox cmpRibbonHORZ = new ComponentsBox(LayoutConstants.X_AXIS);
cmpRibbonHORZ.addComponent(jBtnExporttoExcel, false);
jpBoxButton.add(cmpRibbonHORZ);
this.addFilledComponent(jGPanel, 1, 1, 1, 1, GridBagConstraints.BOTH);
this.addFilledComponent(jGPanel1, 2, 1, 11, 5, GridBagConstraints.BOTH);
this.addFilledComponent(jGPanel2, 2, 13, 17, 5, GridBagConstraints.BOTH);
jGPanel.setSize(650, 91);
jGPanel.setBackground(SystemColor.control);
jGPanel.addFilledComponent(jLblTillNo,1,1,GridBagConstraints.WEST);
jGPanel.addFilledComponent(jLblTillNoData,1,10,GridBagConstraints.BOTH);
jGPanel.setBorder(javax.swing.BorderFactory.createEmptyBorder(0,0,0,0));
jGPanel1.setBackground(SystemColor.control);
jGPanel1.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0,
0));
spTimeEntryView.setViewportView(jtblTimeEntry);
jGPanel1.addFilledComponent(spTimeEntryView, 1, 1, 11, 4,
GridBagConstraints.BOTH);
jGPanel2.addFilledComponent(jLblData,1,1,GridBagConstraints.WEST);
jGPanel2.setBackground(SystemColor.control);
jGPanel2.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0,
0));
//textArea.setText(html);
pan.setViewportView(textArea);
int selectedRow = jTbl1.getSelectedRow();
System.out.println("selectedRow ::" +selectedRow);
int colCount = jTbl1.getColumnCount();
System.out.println("colCount ::" +colCount);
StringBuffer buf = new StringBuffer();
System.out.println("Out Of For");
/*for(int count =0;count<colCount;count++)
{System.out.println("Inside For");
buf.append(jTbl1.getValueAt(selectedRow,count));
// method 1 : Constructs a new text area with the specified text.
textArea =new JTextArea(buf.toString());
//method 2 :To Append the given string to the text area's current text.
textArea.append(buf.toString());
jGPanel2.addFilledComponent(pan,2,1,5,5,GridBagConstraints.BOTH);
this.addAnchoredComponent(jpBoxButton, 7, 5, 11, 5,
GridBagConstraints.CENTER);
This code displays the same data on the JTextArea everytime i select each row,but my requirement is ,it has to refresh and display different datas in the JTextArea accordingly,as i select each row.Please help.Its urgent.
Message was edited by: Samyuktha
SamyukthaPlease help.Its urgentThen why didn't you use the formatting tags to make it easier for use to read the code?
Because of the above I didn't take a close look at your code, but i would suggest you should be using a ListSelectionListener to be notified when a row is selected, then you just populate the text area. -
hi, i hava a problem, i have a jtable where same Data column depend from another column of the same jtable and a jtextfield that is external to jtable
my jtable is
jcombobox | text | text | text ecc....
when the user change the SelectedItem of jcombobox the other column`s data is jacombobox values * external JtextField text....
if i change the value of the external jtextfield how can i refresh the data in the jtable whitout click over all cell???
this is the code of the My CellRender of the first column:
public class MyComboBoxRenderer extends JComboBox implements TableCellRenderer {
JTable jt;
PortataUgelli pug;
public MyComboBoxRenderer(String[] items,JTable table,PortataUgelli pu) {
super(items);
this.jt=table;
this.pug=pu;
addItemListener(new java.awt.event.ItemListener() {
public void itemStateChanged(java.awt.event.ItemEvent evt){
if (jt.getSelectedColumn()==0){ //This action is only for the first column
String ugello= (String)getSelectedItem();
if (ugello==null) ugello=""+0;
double b=Double.parseDouble(pug.getPressione().trim());
String par="" + new VariID().getFunzioneUgelli(ugello,b); //this method calculate the value of the other cell
int sel;
if (jt.getSelectedRow() < 0) sel=0;
else sel = jt.getSelectedRow();
jt.setValueAt(par,sel,1); //set the value of the cell
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
// Select the current value
setSelectedItem(value);
return this;
}It's fairly simple...
you need to have your own custom TableModel. Extend AbstractTableModel and when you go to set a cell (to change the data in that cell) you simply fire an event with the:
fireTableCellUpdated(int row, int column) method to let the view know that the data changed in that cell of that table changed and needs to be redrawn...
Here's the link to the tutorial page/section on creating a custom table model and also firing events when data changes:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#data -
Java JTable Screen Blink Problem.
Dear All,
I am facing Screen blink issue while using the JTable.
JTable is updated in real Time, It uses custom table model.
To update the JTable, I update the Table Model and then call the UpdateUI() and repaint(). These update process is running in non-AWTevent-dispatch thread. So, During the real Time Update of the Table, When we do some rough handling work on the Table( for example, press the Enter Key on the Table for 1-2 minutes, move the Scroll Bar up and down fastly etc), It throws the following exception and the Table starts blinking.
java.lang.NullPointerException
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:1141)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1051)
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 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)
The blinking also moves to Other Components such as JTree which is doing real time update in another screen of the Same Application.
How to resolve this Screen Blinking Phenemenon ? Some suggested to use SwingUtilities.invokeLater() for UpdateUI(). But, I am concerned about the performance, using it in real time update as it may create many threads, it may cause other performance issues. Is other any other better solution ?
Looking forward to your comments !
Thanks !To update the JTable, I update the Table Model and then call the UpdateUI() and repaint(). No need to call updateUI() (I'd like to shot the person in the forum who keeps suggesting that and shot the people who keep using the method without reading the API to see what it actually does) or repaint(). You simply update the TableModel and the table will repaint itself.
Here is a simple example of real time updates to a table from a non-GUI thread:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=597870
We can't help you because we have absolutely no idea what your code looks like -
Not Updating the Values in the JComboBox and JTable
Hi Friends
In my program i hava Two JComboBox and One JTable. I Update the ComboBox with different field on A Table. and then Display a list of record in the JTable.
It is Displaying the Values in the Begining But when i try to Select the Next Item in the ComboBox it is not Updating the Records Eeither to JComboBox or JTable.
MY CODE is this
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.DefaultComboBoxModel.*;
import javax.swing.table.*;
import java.sql.*;
import java.util.*;
public class SearchBook extends JDialog implements ActionListener
private JComboBox comboCategory,comboAuthor;
private JSplitPane splitpane;
private JTable table;
private JToolBar toolBar;
private JButton btnclose, btncancel;
private JPanel panel1,panel2,panel3,panel4;
private JLabel lblCategory,lblAuthor;
private Container c;
//DefaultTableModel model;
Statement st;
ResultSet rs;
Vector v = new Vector();
public SearchBook (Connection con)
// Property for JDialog
setTitle("Search Books");
setLocation(40,110);
setModal(true);
setSize(750,450);
// Creating ToolBar Button
btnclose = new JButton(new ImageIcon("Images/export.gif"));
btnclose.addActionListener(this);
// Creating Tool Bar
toolBar = new JToolBar();
toolBar.add(btnclose);
try
st=con.createStatement();
rs =st.executeQuery("SELECT BCat from Books Group By Books.BCat");
while(rs.next())
v.add(rs.getString(1));
catch(SQLException ex)
System.out.println("Error");
panel1= new JPanel();
panel1.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
lblCategory = new JLabel("Category:");
lblCategory.setHorizontalAlignment (JTextField.CENTER);
c.gridx=2;
c.gridy=2;
panel1.add(lblCategory,c);
comboCategory = new JComboBox(v);
comboCategory.addActionListener(this);
c.ipadx=20;
c.gridx=3;
c.gridwidth=1;
c.gridy=2;
panel1.add(comboCategory,c);
lblAuthor = new JLabel("Author/Publisher:");
c.gridwidth=2;
c.gridx=1;
c.gridy=4;
panel1.add(lblAuthor,c);
lblAuthor.setHorizontalAlignment (JTextField.LEFT);
comboAuthor = new JComboBox();
comboAuthor.addActionListener(this);
c.insets= new Insets(20,0,0,0);
c.ipadx=20;
c.gridx=3;
c.gridy=4;
panel1.add(comboAuthor,c);
comboAuthor.setBounds (125, 165, 175, 25);
table = new JTable();
JScrollPane scrollpane = new JScrollPane(table);
//panel2 = new JPanel();
//panel2.add(scrollpane);
splitpane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,panel1,scrollpane);
splitpane.setDividerSize(15);
splitpane.setDividerLocation(190);
getContentPane().add(toolBar,BorderLayout.NORTH);
getContentPane().add(splitpane);
public void actionPerformed(ActionEvent ae)
Object obj= ae.getSource();
if(obj==comboCategory)
String selecteditem = (String)comboCategory.getSelectedItem();
displayAuthor(selecteditem);
System.out.println("Selected Item"+selecteditem);
else if(obj==btnclose)
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
else if(obj==comboAuthor)
String selecteditem1 = (String)comboAuthor.getSelectedItem();
displayavailablity(selecteditem1);
//System.out.println("Selected Item"+selecteditem1);
System.out.println("Selected Author"+selecteditem1);
private void displayAuthor(String selecteditem)
try
{ Vector data = new Vector();
rs= st.executeQuery("SELECT BAuthorandPublisher FROM Books where BCat='" + selecteditem + "' Group By Books.BAuthorandPublisher");
System.out.println("Executing");
while(rs.next())
data.add(rs.getString(1));
//((DefaultComboBoxModel)comboAuthor.getModel()).setVectorData(data);
comboAuthor.setModel(new DefaultComboBoxModel(data));
catch(SQLException ex)
System.out.println("ERROR");
private void displayavailablity(String selecteditem1)
try
Vector columnNames = new Vector();
Vector data1 = new Vector();
rs= st.executeQuery("SELECT * FROM Books where BAuthorandPublisher='" + selecteditem1 +"'");
ResultSetMetaData md= rs.getMetaData();
int columns =md.getColumnCount();
String booktblheading[]={"Book ID","Book NAME","BOOK AUTHOR/PUBLISHER","REFRENCE","CATEGORY"};
for(int i=1; i<= booktblheading.length;i++)
columnNames.addElement(booktblheading[i-1]);
while(rs.next())
Vector row = new Vector(columns);
for(int i=1;i<=columns;i++)
row.addElement(rs.getObject(i));
data1.addElement(row);
//System.out.println("data is:"+data);
((DefaultTableModel)table.getModel()).setDataVector(data1,columnNames);
//DefaultTableModel model = new DefaultTableModel(data1,columnNames);
//table.setModel(model);
rs.close();
st.close();
catch(SQLException ex)
}Please check my code and give me some Better Solution
Thank youYou already have a posting on this topic:
http://forum.java.sun.com/thread.jspa?threadID=5143235 -
Retrieving values entered in a JTable
Hi!
I have made a sudoku solver as many others, but in the purpose of learning recursion, and now I am implementing GUI to that program. I have bean strugling to set up a table that shows the sudokutable, and most of all how to recieve the values entered into the table. I have looked at forums and search at google, but all the topics on this is not good enough. I just simply do not understand what they mean. Most often they just say: "Just paste this code in and it will turn out as intended". I want to know how it works.
I have added the code below:
import javax.swing.*;
import javax.imageio.*;
import java.awt.*;
import java.awt.event.*;
import easyIO.*;
import java.util.*;
import java.io.*;
* Klassen Oblig3 som inneholder main metoden som starter programmet.
* Dette er Utsynen for programmet.
* @Param ru - Peker til klassen Rute.
* @Param br - Peker til klassen Brett.
* @Param skrivebord - En ny desktpoPane som representerer hovedvinduet..
public class Oblig3 extends JFrame implements ActionListener {
Rute ru = new Rute();
Brett br = new Brett(ru);
ImageIcon icon;
Image image;
JDesktopPane skrivebord;
* Konstrukt�ren Oblig3 som setter opp hovedvinduet.
* @Param skjemrStorelse - Lagrer st�relsen p� skjermen.
public Oblig3() {
super("Oblig3");
int innrykk = 400;
Dimension skjermStorelse = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(innrykk, innrykk, skjermStorelse.width - innrykk*3, skjermStorelse.height - innrykk*2);
skrivebord = new JDesktopPane()
Image im = (new ImageIcon("bilder/panzer.gif")).getImage();
public void paintComponent(Graphics g){
g.drawImage(im,0,0,this);
setContentPane(skrivebord);
setJMenuBar(lagMenyList());
skrivebord.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
} // Slutt p� konstrukt�ren Oblig3
* JMenuBar metoden som gir menyen til hovedvinduet.
* @Param menyList - Peker p� et MenuBar objekt.
* @Param meny# - Menyene p� menylisten.
* @Param menyObjekt - Et valg p� gitt meny.
protected JMenuBar lagMenyList() {
JMenuBar menyList = new JMenuBar();
// F�rste menyen
JMenu meny1 = new JMenu("Fil");
meny1.setMnemonic(KeyEvent.VK_F);
menyList.add(meny1);
// Gruppe1 med JMenuObjekt
JMenuItem menyObjekt = new JMenuItem("�pne brett", new ImageIcon("bilder/folder.gif"));
menyObjekt.setMnemonic(KeyEvent.VK_O);
menyObjekt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));
menyObjekt.setActionCommand("�pne brett");
menyObjekt.addActionListener(this);
meny1.add(menyObjekt);
menyObjekt = new JMenuItem("Spare brett", new ImageIcon("bilder/floppy.gif"));
menyObjekt.setMnemonic(KeyEvent.VK_S);
menyObjekt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));
menyObjekt.setActionCommand("Spare brett");
menyObjekt.addActionListener(this);
meny1.add(menyObjekt);
meny1.addSeparator();
menyObjekt = new JMenuItem("Exit");
menyObjekt.setMnemonic(KeyEvent.VK_ESCAPE);
menyObjekt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, ActionEvent.CTRL_MASK));
menyObjekt.setActionCommand("Exit");
menyObjekt.addActionListener(this);
meny1.add(menyObjekt);
// Lage den andre menyen
JMenu meny2 = new JMenu("Edit");
meny1.setMnemonic(KeyEvent.VK_E);
menyList.add(meny2);
// Gruppe2 med JMenObjekt
menyObjekt = new JMenuItem("L�s Brett");
menyObjekt.setMnemonic(KeyEvent.VK_L);
menyObjekt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, ActionEvent.CTRL_MASK));
menyObjekt.setActionCommand("L�s Brett");
menyObjekt.addActionListener(this);
meny2.add(menyObjekt);
menyObjekt = new JMenuItem("Lag eget brett");
menyObjekt.setMnemonic(KeyEvent.VK_L);
menyObjekt.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, ActionEvent.ALT_MASK));
menyObjekt.setActionCommand("Lag eget brett");
menyObjekt.addActionListener(this);
meny2.add(menyObjekt);
// Lage den tredje menyen
JMenu meny3 = new JMenu("Hjelp");
meny1.setMnemonic(KeyEvent.VK_H);
menyList.add(meny3);
// Gruppe3 med JMenObjekt
menyObjekt = new JMenuItem("Version?");
menyObjekt.setActionCommand("Version?");
menyObjekt.addActionListener(this);
meny3.add(menyObjekt);
menyObjekt = new JMenuItem("www.dresas.com");
menyObjekt.setActionCommand("www.dresas.com?");
menyObjekt.addActionListener(this);
meny3.add(menyObjekt);
return menyList;
} // Slutt p� JMenuBar metoden.
* Metode som lytter p� menyval mm.
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("�pne brett")) {
lesFraFil();
} else if (e.getActionCommand().equals("L�s Brett")) {
losning();
} else if (e.getActionCommand().equals("Exit")) {
System.exit(0);
} else if (e.getActionCommand().equals("Version?")) {
version();
} else if (e.getActionCommand().equals("www.dresas.com")) {
link();
} else if (e.getActionCommand().equals("Lag eget brett")) {
lagEgetBrett();
} // Slutt p� if-else-if setning.
* Metoden lesFraFil som ber om navn p� fil fra bruker
* via grensesnittet.
protected void lesFraFil() {
final String losFraFil = JOptionPane.showInputDialog(null, "Skriv inn navn p� filen.");
svarLesFraFil(losFraFil + ".txt");
} // Slutt p� metoden losFraFil
* Metoden svarLesFaFil som gir resultat p� inlesning fra fil.
protected void svarLesFraFil(String filnavn) {
boolean rF = br.lesBrettFraFil(filnavn);
if(rF == true) {
JOptionPane.showMessageDialog(this, "Filen er lest inn");
} else {
JOptionPane.showMessageDialog(this, "Filen ble ikke lest inn,\n (husk sm� og store bokstaver)");
} // Slutt p� if-else
} // Slutt p� metoden svarLosFraFil
* Metoden losning som gir resultat p� l�st brett.
protected void losning() {
ru.provAlleSifferMegOgResten(0);
br.skrivLosning();
} // Slutt p� metoden losning
protected void version() {
JOptionPane.showMessageDialog(null, "Dette er version 0.7");
protected void link() {
OpenBrowser op = new OpenBrowser();
op.displayURL("www.dresas.com");
} // Slutt p� metoden link
* Metoden lagEgetBrett som lar brukeren tegne sitt eget
* brett og l�se det.
* @Param ramme - Peker p� objektet av klassen InternRamme som
* setter opp det interne vinduet.
protected void lagEgetBrett() {
int boksBredde = 3;
int boksHojde = 3;
int brettStorelse = 9;
boolean b1 = true;
while (b1) {
boksBredde = Integer.parseInt(JOptionPane.showInputDialog(null, "Skriv inn Bredde p� boksen. (2-4)"));
if (boksBredde > 1 && boksBredde < 5) {
boksHojde = Integer.parseInt(JOptionPane.showInputDialog(null, "Skriv inn H�jde p� boksen. (3-4)"));
if (boksHojde > 2 && boksHojde < 5) {
b1 = false;
} else {
JOptionPane.showMessageDialog(null, "M� vaere mellom 3 og 4.");
continue;
} else {
JOptionPane.showMessageDialog(null, "M� vaere mellom 2 og 4.");
continue;
brettStorelse = boksBredde * boksHojde;
InternRamme ramme = new InternRamme(brettStorelse * 16, brettStorelse * 16);
Object[][] data = new Object[brettStorelse][brettStorelse];
for (int i = 0;i < brettStorelse;i++) {
for (int j = 0; j < brettStorelse;j++) {
data[i][j] = 0;
String[] columnNames = new String[brettStorelse];
for (int i = 0; i < brettStorelse;i++) {
int b = 1 + i;
columnNames[i] = String.valueOf(b);
JTable sudokuTabell = new JTable(data, columnNames);
sudokuTabell.setGridColor (new Color (tilfeldig(256), tilfeldig(256), tilfeldig(256)));
sudokuTabell.setFont(new Font ("Tahoma", Font.PLAIN, 16));
setVisible(true);
ramme.add(sudokuTabell);
ramme.setVisible(true);
skrivebord.add(ramme);
try {
ramme.setSelected(true);
} catch (java.beans.PropertyVetoException e) {}
} // Slutt p� klassen lagEgetBrett
* Metode som returnerer tilfeldigt verdi st�rre en 0 og mindre
* en maks.
public static int tilfeldig (int maks) {
return (int) (Math.random () * maks);
* Metoden utsyn som tegner opp programmet p� skjermen.
* @Param frame - Peker p� objektet Oblig3.
private static void utsyn() {
//Create and set up the window.
Oblig3 frame = new Oblig3();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Display the window.
frame.setVisible(true);
} // Slutt p� metoden utsyn.
* Metoden main som starter programmet.
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
utsyn();
} // Slutt p� metoden main.
} // Slutt p� klassen Oblig3.
* Brukt av Oblig3
class InternRamme extends JInternalFrame {
static int tellOpneRammer = 0;
static final int xOffset = 30, yOffset = 30;
InternRamme(int bredde, int hojde) {
super("Lag eget Brett #" + (++tellOpneRammer),
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
//...Create the GUI and put it in the window...
//...Then set the window size or call pack...
setSize(bredde,hojde);
//Set the window's location.
setLocation(xOffset*tellOpneRammer, yOffset*tellOpneRammer);
}Here is the method in mind, translated...
protected void ConstructOwnBoard() {
int boxWidth = 3;
int boxHeight = 3;
int BoardSize = 9;
boolean b1 = true;
while (b1) {
boxWidth = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Width. (2-4)"));
if (boxWidth > 1 && boxWidth < 5) {
boxHeight = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Height. (3-4)"));
if (boxHeight > 2 && boxHeight < 5) {
b1 = false;
} else {
JOptionPane.showMessageDialog(null, "Must be btween 3 og 4.");
continue;
} else {
JOptionPane.showMessageDialog(null, "Must be between 2 og 4.");
continue;
BoardSize = boxWidth * boxHeight ;
InternalFrame frame = new InternalFrame(BoardSize * 16, BoardSize * 16);
Object[][] data = new Object[BoardSize ][BoardSize ];
for (int i = 0;i < BoardSize ;i++) {
for (int j = 0; j < BoardSize ;j++) {
data[i][j] = 0;
String[] columnNames = new String[BoardSize ];
for (int i = 0; i < BoardSize ;i++) {
int b = 1 + i;
columnNames[i] = String.valueOf(b);
JTable sudokuTable = new JTable(data, columnNames);
sudokuTable.setGridColor (new Color (tilfeldig(256), tilfeldig(256), tilfeldig(256)));
sudokuTable.setFont(new Font ("Tahoma", Font.PLAIN, 24));
TableColumn column = null;
for (int i = 0; i < BoardSize ; i++) {
column = sudokuTable.getColumnModel().getColumn(i);
column.setMinWidth(25);
column.setMaxWidth(25);
column.setResizable(false);
setVisible(true);
frame.add(sudokuTable);
frame.setVisible(true);
desktop.add(ramme);
try {
frame.setSelected(true);
} catch (java.beans.PropertyVetoException e) {}
} // end of class
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