Here is a code that read database values and store into jtable and retrieve jtable row values into jtextfield on clicking at particular row.

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

class DisplayTableAction{
int counter1=0,counter2=0,counter3=0,counter4=0;
int counter=0;
public static void main(String arg[]){
DisplayTableAction action=new DisplayTableAction();
}
DisplayTableAction(){
ListSelectionModel listSelectionModel;
final Vector columnNames = new Vector();
final Vector data = new Vector();
try{
Connection con = null;
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
Statement st = con.createStatement();
ResultSet rs= st.executeQuery("Select * from person");
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 );
}
rs.close();
st.close();
}
catch(Exception e) {}
JFrame frame=new JFrame();
frame.setLayout(null);
final JLabel lab1=new JLabel("ID");
final JTextField text1=new JTextField(20);

final JLabel lab2=new JLabel("Name");
final JTextField text2=new JTextField(20);

final JLabel lab3=new JLabel("Address");
final JTextField text3=new JTextField(20);

final JLabel lab4=new JLabel("Email");
final JTextField text4=new JTextField(20);
lab1.setBounds(150,230,100,20);
text1.setBounds(270,230,100,20);

lab2.setBounds(150,260,100,20);
text2.setBounds(270,260,100,20);

lab3.setBounds(150,290,100,20);
text3.setBounds(270,290,100,20);

lab4.setBounds(150,320,100,20);
text4.setBounds(270,320,100,20);


final JTable table = new JTable(data, columnNames);
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(150,100,400,100);
frame.add(lab1);
frame.add(text1);

frame.add(lab2);
frame.add(text2);

frame.add(lab3);
frame.add(text3);

frame.add(lab4);
frame.add(text4);
frame.add( scrollPane );
frame.setVisible(true);
frame.setSize(800,500);

lab1.setVisible(false);
text1.setVisible(false);

lab2.setVisible(false);
text2.setVisible(false);

lab3.setVisible(false);
text3.setVisible(false);

lab4.setVisible(false);
text4.setVisible(false);
table.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e){

Object obj1=null,obj2=null,obj3=null,obj4=null;
String q="";
int i=table.getSelectedRow();
if(i==0){
counter1++;
q=Integer.toString(counter1);
}
if(i==1){
counter2++;
q=Integer.toString(counter2);
}
if(i==2){
counter3++;
q=Integer.toString(counter3);
}
if(i==3){
counter4++;
q=Integer.toString(counter4);
}
obj1 = GetData(table, i, 0);
obj2 = GetData(table, i, 1);
obj3 = GetData(table, i, 2);
obj4 = GetData(table, i, 3);


lab1.setVisible(true);
text1.setVisible(true);

lab2.setVisible(true);
text2.setVisible(true);

lab3.setVisible(true);
text3.setVisible(true);

lab4.setVisible(true);
text4.setVisible(true);
text1.setText(obj1.toString());
text2.setText(obj2.toString());
text3.setText(obj3.toString());
text4.setText(obj4.toString());


}
});

}
public Object GetData(JTable table, int row_index, int col_index){
return table.getModel().getValueAt(row_index, col_index);
}
}