(Java) Caricare driver mysql

[Faenr]

import java.sql.*;

class Retrieve
{
    public static void main (String args[])
         {
         try
            {
            try
                 {
                 Class.forName("com.mysql.jdbc.Driver");
                                }
            catch (ClassNotFoundException e) 
                {
                System.out.println("Mysql device driver does not exist");
                System.exit(1);
                }
            Connection conn = DriverManager.getConnection("jdbc:mysql://0.0.0.0:0/users_table?user=user&password=password");
            Statement stmt = conn.createStatement();
            ResultSet rset = stmt.executeQuery("select username, password from users");
            while (rset.next())
                                {
                                System.out.println(rset.getString(1)+" "+rset.getString(2));
                                }
                        rset.close();
                        stmt.close();
                        conn.close();
                        }
                catch (SQLException e)
                        {
                        System.out.println("error accesing DataBase");
                        System.out.println("error code is: "+e.getErrorCode());
                        System.out.println("error message is: "+e.getMessage());
                        }
                }
    } 

in fase di compilazione non mi da errori, ma in esecuzione ritorna sempre "Mysql device driver does not exist" .... Class.forName sbagliate per mysql?