JTable & backend
Dear All,
Right now, i am hardcoding the values for the JTable display. but i want it to be populated from my resultset.....how to do that??? exact "code" for this alone is most appreciated...
right now,
final Object[][] data = {{"Mary", "Campione", "Snowboarding","1","2","3"},{"Alison", "Huml", "Rowing","4","5","6"},{"Kathy", "Walrath","Chasing","7","8","9"}};
but i want it to be done in dynamic filling.........................
My resultset is like this...
ResultSet resultset = stmt.executeQuery("select count(*) from empdetails;");
I can retrieve the values from the above resultset. but how to display it in the JTable dynamically????
waiting for the reply,
Sakthivel S.
hey,
if you do not want to extend a JTextField, then in your abstracttable model say
public boolean isCellEditable(int row, int col){ // i am not sure if the arguments are correct, check them in the api
if(col == 0) return true;
else return false;
hope this helps you
hussain
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Exception -arrayindexoutobound while inserting checkbox in a jtable
hello,
i am using oracle as backend. As you might be knowing that oracle doesn't store boolean datatype.
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please do help me if you can.HELLO camickr
ONE INTERESTING THING IS HAPPENING->
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i had declared the listener on JTABLE1 as->
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Hi everyone, I've been trying to create a JTable in which the first row and first column have a different background (since they contain "headers" and not actual data). I could not find a way to include headers for both columns and rows, so I defined a class called public MyTableModel, which extends AbstractTableModel and basically fetches data from the backend and puts the labels that I need in the leftmost column and topmost row. Ths class only provides implementation for getColumnClass(), getColumnCount(), getRowCount() and getValueAt(int x, int y). To make the labels stand out I wrote a class that implements TableCellRenderer and overrides its
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However,.If I do that:
MyTableModel model = new MyTableModel();
JTable table = new JTable(model);nothing happens. If I do that, everything works as expected:
//taken off the internet
Object rows[][] = { { "one", "ichi - \u4E00" },
{ "two", "ni - \u4E8C" }, { "three", "san - \u4E09" },
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{ "six", "roku - \u516D" }, { "seven", "shichi - \u4E03" },
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Thank you!Here is a short and executable summary of the application. The table model is just a wrapper for the SparseDoubleMatrix2D, which holds the actual data. I do appologize for not using at array in this example, but I suspect the problem may be partly due to Colt.
package test.tables;
import cern.colt.matrix.impl.SparseDoubleMatrix2D;
import java.awt.Color;
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
public class MyModel extends AbstractTableModel{
//cern.colt.SparseDoubleMatrix2D, just a high-performance array of Double
//to actually compile and run thiyou need to add Colt to the classpath
//http://acs.lbl.gov/~hoschek/colt-download/releases/colt-1.2.0.zip
private SparseDoubleMatrix2D matrix;
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//fetch data from the backend, format it, store into 'matrix'
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return true;
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matrix.setQuick(row, col, Double.parseDouble(value.toString()));
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//removes information from the matrix
public static void main(String[] args){
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table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {
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if (row == 0 || column == 0) {
comp.setBackground(Color.red);
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} -
Detecting JTable column changes
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}My problem is that I want to allow column reordering but I don't know how to keep my titles[] array in sync with the changes (which is important in other areas of the program).
Can anyone point me in the right direction?Jtable always messages the tableModel's setValueAt in the model coordinates - as are all calls from the JTable to the model, JTable converts them internally. There is no need to track the view coordinates (they are handled exclusively at the view level).
If you have to do some backend update in the tableModel based on the columnNames in some particular column just do so in the the setValueAt(...) of the model, roughly like:
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super.setValueAt(..);
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}Greetings
Jeanette -
Start or stop edit jtable cell editing
Hello,
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Hi there,
I am having a JTable in a JPanel. I am displaying the values in it from the backend. Upto this it is working fine. (I am using DefaultTableModel). My cells are kept editable. I am trying to type something in my cell...it is getting appended.....after that, WITHOUT MOVING THE POINTER TO SOMEOTHER CELL, if i try to collect all the values from the JTable, (using mytablemodel.getDataVector();)....it is giving the old value of that cell....the editted value is not gettting received...but once if i edit and move the cursor to some other cell, i can get the editted value....but how to get the editted(updated) value, without moving the cursor postion???
hope u should have got my question....
waiting for ur reply....
with advance thanx
bye,
Sakthivel S.So how many times are you going to post the same question?:
http://forum.java.sun.com/thread.jsp?forum=31&thread=318938
http://forum.java.sun.com/thread.jsp?forum=57&thread=318932
http://forum.java.sun.com/thread.jsp?forum=57&thread=318940
People get annoyed when they spend time answering a question only to find out someone else has anwered it in another thread. DO NOT CROSS POST.
This thread should answer your question:
http://forum.java.sun.com/thread.jsp?forum=31&thread=318761 -
Hi there,
I am having a JTable in a JPanel. I am displaying the values in it from the backend. Upto this it is working fine. (I am using DefaultTableModel). My cells are kept editable. I am trying to type something in my cell...it is getting appended.....after that, WITHOUT MOVING THE POINTER TO SOMEOTHER CELL, if i try to collect all the values from the JTable, (using mytablemodel.getDataVector();)....it is giving the old value of that cell....the editted value is not gettting received...but once if i edit and move the cursor to some other cell, i can get the editted value....but how to get the editted(updated) value, without moving the cursor postion???
hope u should have got my question....
waiting for ur reply....
with advance thanx
bye,
Sakthivel S.Yeah boss,
I am trying to fetch the data of that said cell, ONLY AFTER the user clicks a button(after editing the cell).............called as "save" button
here is the gist of the code:
save.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent aevent)
String command=aevent.getActionCommand();
if(command.equals("Save Data"))
Vector basevector = mytablemodel.getDataVector();
int capacity = basevector.size();
try
stmt.executeUpdate("Delete * from pollingdetails;");
for(int index=0;index<capacity;index++)
Vector innervector = (Vector)basevector.elementAt(index);
stmt.executeUpdate("insert into pollingdetails values(" + "'"+ innervector.elementAt(0) +"'" + "," + "'"+innervector.elementAt(1)+"'" + "," + "'"+innervector.elementAt(2)+"'" + "," + "'"+innervector.elementAt(3)+"'" + "," + "'"+innervector.elementAt(4)+"'" + "," + "'"+innervector.elementAt(5)+"'" + ");");
innervector=null;
catch(Exception exp)
{exp.printStackTrace();}
basevector=null;
waiting for ur reply,
Sakthivel S. -
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Here a sample code...
Who could help me to fill it?
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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();
}
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