Some error in setting table model to a JTable..kindly help..

Question

hi all,
i m pasting a code of a function in which i fetch data from the database n display it in a JTable pasted on a panel in a JFrame window.
There is some problem with the table model which i m unable to correct.
Kindly help..
public void showDetails(){
     Statement statement;
     ResultSet rs;
Connection connection;
     //DATABASE CONNECTION
          try{
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          connection=DriverManager.getConnection("jdbc:odbc:iirsdb");
               statement=connection.createStatement();
               String strQuery=null;
               Object[][] data;
               //SELECT QUERIES
                    if(index>=1 && index<=14)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblStatic where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
                    if(index>17 && index<=22)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblSemiDyn where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
                    if(index==25)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblDyn where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
               rs=statement.executeQuery(strQuery);
               ResultSetMetaData rsmd=rs.getMetaData();
               int col=rsmd.getColumnCount();
               Vector colNames=new Vector();
               Vector row=new Vector();
               for(int i=1;i<=col;i++){
                    colNames.addElement(rsmd.getColumnName(i));
               while(rs.next()){
                    for(int i=1;i<=col;i++){
                         row.addElement(rs.getObject(i));
                    data.addElement(row);
               DefaultTableModel tableModel = new DefaultTableModel(data, colNames);
               JTable table= new JTable(tableModel);
               //table.setModel(new DefaultTableModel(data,colNames));
               //JTable.revalidate();
               //display table with ResultSet contents
                         //JTable table= new JTable(row, colNames);
                         JScrollPane scroller=new JScrollPane(table);
                         pnlFifth.add(scroller,BorderLayout.CENTER);
                         scroller.setVisible(true);
                         scroller.validate();
               rs.close();
}catch(ClassNotFoundException cnfex){
               System.err.println("Failed to load JDBC/ODBC driver");
               cnfex.printStackTrace();
catch (SQLException sql){
JOptionPane.showMessageDialog(this, "Cannot connect to Database"+sql,"Error", JOptionPane.WARNING_MESSAGE);
}

Answer 1

hi..okays..will take care of this..actually, this ws d first time i ws using this community service.
Below.i inserted checkstatements but still d table isnt getting displayed..wht to do? D logic is correct i guess but whr is d problem?
public void showDetails(){
     Statement statement;
     ResultSet rs;
    Connection connection;
    Vector colNames=null;
         Vector data=null;
     //DATABASE CONNECTION
          try{
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                connection=DriverManager.getConnection("jdbc:odbc:iirsdb");
               String strQuery=null;
          data = new Vector();
               //SELECT QUERIES
                    if(index>=1 && index<=14)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblStatic where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
                    if(index>17 && index<=22)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblSemiDyn where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
                    if(index==25)
                         strQuery="select IP_Address,"+strMapped+",Timestamp from tblDyn where IP_Address='" + strIP + "' and Timestamp='"+strTime+"' and "+strMapped+"='"+strDetailResult+"'";
               statement=connection.createStatement();
               rs=statement.executeQuery(strQuery);
               ResultSetMetaData rsmd=rs.getMetaData();
               int col=rsmd.getColumnCount();
               //int r=rsmd.getRowCount();
               colNames=new Vector();
               for(int i=1;i<=col;i++){
                    colNames.addElement(rsmd.getColumnName(i));
               while(rs.next()){
                    Vector row=new Vector(col);
                    for(int i=1;i<=col;i++){
                         row.addElement(rs.getObject(i));
                    data.addElement(row);
               rs.close();
               statement.close();
}catch(ClassNotFoundException cnfex){
               System.err.println("Failed to load JDBC/ODBC driver");
               cnfex.printStackTrace();
catch (SQLException sql){
            JOptionPane.showMessageDialog(this, "Cannot connect to Database"+sql,"Error", JOptionPane.WARNING_MESSAGE);
JTable table=new JTable(data,colNames)
            public Class getColumnClass(int column)
                for (int row = 0; row < getRowCount(); row++)
                    Object o = getValueAt(row, column);
                    if (o != null)
                        return o.getClass();
                return Object.class;
        JScrollPane scrollPane = new JScrollPane( table );
        //getContentPane().add( scrollPane );
        pnlFifth.add( scrollPane );
        scrollPane.setVisible(true);
}