wants to insert empty row after each record in JTable

    try
    {
        Class.forName("com.mysql.jdbc.Driver");
        con=DriverManager.getConnection("jdbc:mysql://localhost/BOA","root","");
        st=con.createStatement();
        String sql=("select gbal from GeneralLedger where group='Capital'");
        rs=st.executeQuery(sql);    
        while(rs.next())
        {
            Vector row=new Vector();
        row.add("Capital"); 
                row.add("");
            row.add("1");
            row.add("Fixed Assets");
                row.add("");
        row.add("7");
            data.add(row);

        }
    }
    catch(Exception e)
    {
        System.out.println(e);
    }

Successfully I have fetch record from database and stored in my JTable but don't know how to add empty row after each record in JTable? Can any one please suggest me?

How about defaultTableModel.addRow(new Object[] {});, assuming you are using a DefaultTableModel. You should be using some kind of model. If you have a custom model, then show it to us.

Here's a simple example with DefaultTableModel

import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class TestTable {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                String[][] data = { { "Data", "Data" } };
                String[] col = { "Col", "Col" };
                final DefaultTableModel model = new DefaultTableModel(data, col);
                JTable table = new JTable(model);
                JButton addRow = new JButton("Add Empty Row");
                addRow.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        model.addRow(new Object[] {});
                    }
                });
                JPanel panel = new JPanel(new BorderLayout());
                panel.add(new JScrollPane(table));
                panel.add(addRow, BorderLayout.SOUTH);
                JOptionPane.showMessageDialog(null, panel);
            }
        });
    }
}

If by chance you have no experience working with models, see How to Use Tables: Creating a TableModel

EDIT to your new comments and edit

All you need to do is add an emtpy Vector every time you are adding a new row.