Displaying the table using TableModel

Question

Hi,
I am using TableModel to connect to a database and display the results. I am unable to display the table. It doesn't display anything. Below is the code from the TableModel I am using to connect to database. Could anyone help me find the errors please. any help would be ggreatly appreciated.
public HolidayTableModel() throws ClassNotFoundException, SQLException
         tableData = new Vector();
         int currentRow = 0;  
        try
             Class.forName("oracle.jdbc.driver.OracleDriver");
             Connection con = DriverManager.getConnection("jdbc:odbc:thin:@rub:1521:1B","asd","asdf");                                   System.out.println("Connection Established...");
            sqlStatement = con.createStatement();
            ResultSet rs = sqlStatement.executeQuery("select * from hlday10t");                                      System.out.println("ResultSet Statement executed...");
            numCols = rs.getMetaData().getColumnCount();
            columnNames = new String[numCols]; //Get the column names and cache them                                      for(int column = 0; column<numCols; column++)
                 columnNames[column] = rs.getMetaData().getColumnLabel(column+1);
              while (rs.next())
                 Vector rowVector = new Vector();
                 for (int currentCol = 1; currentCol < numCols; currentCol++)
                     rowVector.addElement(rs.getObject(currentCol));
                 tableData.addElement(rowVector);
                 con.close();
                fireTableChanged(null);//Tell the listener a new table has arrived
        catch(ClassNotFoundException e){
              System.out.println("*** Cannot find database driver classes: "+e.getMessage());                                                            
         catch(SQLException e) {
             System.out.println("*** Cannot connect to this database: "+e.getMessage());                               } 

Answer 1

Hi,
My TableModel extends AbstractTabelModel. Here is the full code. Sorry for posting partial code before.
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.*;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.swing.table.AbstractTableModel;
import java.util.*;
import java.text.*;
import java.sql.*;
import java.net.*;
import java.util.Properties;
import java.applet.Applet;
import oracle.jdbc.driver.*;
public class HolidayTableModel extends AbstractTableModel {
     int rows = 0;
     Vector data = new Vector();
        String[] columnNames = {"HOLIDAY_CODE",
                         "HOLIDAY_DESCR",
                         "HOLIDAY_DATE",
                         "LAST_CHANGE_USERID",
                         "LAST_CHANGE_TMSTMP"};
        Connection con;
        Statement sqlStatement;
        int numCols = 0;
        int numRows = 0;
        Vector tableData;
        public HolidayTableModel() throws ClassNotFoundException, SQLException
           tableData = new Vector();
           int currentRow = 0;
           try
              Class.forName("oracle.jdbc.driver.OracleDriver");
              Connection con = DriverManager.getConnection("jdbc:odbc:thin:@d1b:1521:1B","asdf","asdf");
              System.out.println("Connection Established...");
              sqlStatement = con.createStatement();
              ResultSet rs = sqlStatement.executeQuery("select * from hlday10t");
              System.out.println("ResultSet Statement executed...");
              numCols = rs.getMetaData().getColumnCount();
              columnNames = new String[numCols];
              //Get the column names and cache them
              for(int column = 0; column<numCols; column++)
                 columnNames[column] = rs.getMetaData().getColumnLabel(column+1);
              while (rs.next())
                 Vector rowVector = new Vector();
                 for (int currentCol = 1; currentCol < numCols; currentCol++)
                    rowVector.addElement(rs.getObject(currentCol));
                 tableData.addElement(rowVector);
                 con.close();
                 fireTableChanged(null);//Tell the listener a new table has arrived
           catch(ClassNotFoundException e){
               System.out.println("*** Cannot find database driver classes: "+e.getMessage());
           catch(SQLException e) {
                System.out.println("*** Cannot connect to this database: "+e.getMessage());
     public int getRowCount() {
          return tableData.size();
       public int getColumnCount() {
            return columnNames.length;
       public String getColumnName(int index) {
            return columnNames[index];
       public Object getValueAt(int row, int column)
           Vector rowVector = (Vector)tableData.elementAt(row);
           return (String)rowVector.elementAt(column);
     public void addRow(Vector rowData) {
          tableData.addElement(rowData);
          fireTableRowsInserted(tableData.size(), tableData.size() );
       public void removeRow(int row)
          data.removeElementAt(row);
          fireTableDataChanged();
       public boolean isCellEditable(int row, int column) {
          return true;
     public void setValueAt(Object o, int row, int column)
          // change a field of hi
          HolidayItem hi = (HolidayItem)data.elementAt(row);
          switch (column) {
               case 4:
                    hi.hlday_code = (String)o;
                    break;
               default:
                    System.out.println("Bad column when editing data: "+column);
                    break;
          fireTableCellUpdated(row, column);
}