Database using JTable

Write a java program to display the Records of Doctor(DNo,DName,Salary) from the

    database and display it on the screen.(use JTable).

import java.awt.*;

import java.awt.event.*;

import java.sql.*;

import javax.swing.*;

public class Doctor extends JFrame

{

            Connection cn;

            Statement st;

            ResultSet rs;

            String head[]={"Dno","DName","Salary"};

            String as[][]=new String[10][10];

            public Doctor()

            {

                        try

                        {

                                    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

                                       cn=DriverManager.getConnection("jdbc:odbc:Docs","","");

                                    st=cn.createStatement();

                                    rs=st.executeQuery("select * from doc");

                                    int i=0;

                                    while(rs.next())

                                    {

                                                as[i][0]=rs.getString("dno");

                                                as[i][1]=rs.getString("dname");

                                                as[i][2]=rs.getString("sal");

                                                i++;

                                    }

                                    JTable jt=new JTable(as,head);

                                    JScrollPane pane=new JScrollPane(jt);

                                    getContentPane().add(pane);

                        }

                        catch(Exception e)

                        {

                                    System.out.println(e);

                        }

                        setSize(400,400);

                        setVisible(true);

            }

            public static void main(String args[])

            {

                        new Doctor().show();

            }

}