Conexão Java X Oracle

package oraclexejdbc;

import java.net.PasswordAuthentication;

import java.sql.*;

import oracle.jdbc.pool.OracleDataSource;

 

public class Main {

   

    public static void main(String[] args) {

        Connection con;

        String url;

        String user;

        String password;

       

        url = new String("jdbc:oracle:thin:@localhost");

        user = new String("Leonardo");

        password = new String("870339");

       

        try {

           OracleDataSource ds = new OracleDataSource();

           ds.setURL(url);

           ds.getConnection(user,password);

       

           con = ds.getConnection(user,password);

          

           Statement stmt = con.createStatement();

           ResultSet rs = stmt.executeQuery("SELECT Codigo,Nome,EMAIL FROM tblCliente");

          

           System.out.println("Exibindo os registros");

           System.out.println("-------------------------------------------------------------------------");

           while(rs.next()) {

               System.out.println(rs.getObject(1).toString() + "  - " +

                          rs.getObject(2).toString() + " - " +

                          rs.getObject(3).toString());

           }

           System.out.println("\n");

        }

        catch(Exception e) {

           System.out.println("Ocorreu um erro" + e.getMessage());

           System.exit(0);

        }

    }

}