Here is a code that search the data from the database and show multiple identical rows from database on clicking search button to jtable.

import java.awt.*;
import java.sql.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

class Search{
    public static void main(String[] args) {
        final Vector columnNames = new Vector();
        final Vector data = new Vector();

        JLabel lab=new JLabel("Enter Name:");
        final JTextField t=new JTextField(20);
        JButton b = new JButton("Search");
        final JTable table=new JTable();
        final JScrollPane pane=new JScrollPane(table);

        JFrame f = new JFrame();
        f.setLayout(null);
        lab.setBounds(10,10,100,20);
        t.setBounds(120,10,100,20);
        b.setBounds(120,40,80,20);
        pane.setBounds(10,70,480,170);
        pane.setVisible(false);
        f.add(lab);
        f.add(t);
        f.add(b);
        f.add(pane);
        pane.setVisible(false);
        f.setSize(500,300);
        f.setVisible(true);

        b.addActionListener(new ActionListener(){
           public void actionPerformed(ActionEvent e){
           String name=t.getText();
            try{
           Class.forName("com.mysql.jdbc.Driver");
           Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
           Statement st=con.createStatement();
           ResultSet rs=st.executeQuery("select * from data where name='"+name+"'");
           ResultSetMetaData md = rs.getMetaData();
            int columns = md.getColumnCount();
            for (int i = 1; i <= columns; i++){
            columnNames.addElement(md.getColumnName(i) );
            }
            while(rs.next()){
            Vector row = new Vector(columns);
            for (int i = 1; i <= columns; i++){
            row.addElement( rs.getObject(i) );
            }
            data.addElement(row);
           }
           DefaultTableModel model=new DefaultTableModel(data, columnNames);
           table.setModel(model);
           pane.setVisible(true);
            }
            catch(Exception ex){
            System.out.println(e);
            }
          }
        });
    }
}

Thank you deepak Thank you very much .Excellent job .

once again thanx ...........