JDBC Prepared Statement

import java.sql.*;
import java.util.*;

class DoPrepSQL
{
    Connection con;
    PreparedStatement ps = null;
    String updateName = "UPDATE PrepStudent SET StudentName=? where ID=?";
    List<String> rightNames = new ArrayList<String>();
    List<String> IDs = new ArrayList<String>();
    public void ConnectToDB() throws SQLException, ClassNotFoundException
    {
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        String url = "jdbc:odbc:PrepStudentDSN";
        con = DriverManager.getConnection(url, "", "");
        con.setAutoCommit(false);
        ps = con.prepareStatement(updateName);
    }
    public void PopulateNames()
    {
        rightNames.add("Vishal Agarwal");
        rightNames.add("Mohit Sachdeva");
        IDs.add("10-CS-1076");
        IDs.add("10-CS-1094");
    }
    public void UpdateDetails() throws SQLException, ClassNotFoundException
    {
        ConnectToDB();
        PopulateNames();
        for(int i = 0; i < 2; i++)
        {
            ps.setString(1, rightNames.get(i));
            ps.setString(2, IDs.get(i));
            ps.executeUpdate();
        }
        con.commit();
        if(ps != null)
            ps.close();
    }
}

public class PreparedStateUse
{
    public static void main(String... args)
    {
        try
        {
            DoPrepSQL ds = new DoPrepSQL();
            ds.UpdateDetails();
        }
        catch(Exception e)
        {
            System.err.println(e.toString());
        }
    }
}