No suitable driver for connection to mysql database web host on using java

I am trying to connect to a mysql database which i have hosted on a web host instead of localhost using java. i have included the mysql-connector in the java build path of the project. i have the following code:

package com;
import java.sql.*;

public class Retrieve{
    public static void main(String[] args) throws InstantiationException, IllegalAccessException
    {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        String host = "mysql4.000webhost.com/a6136644_bustrac";
        String user = "";
        String password = "";
        Connection conn = null;
        try {
            conn = DriverManager.getConnection(host, user, password);
            if(conn != null)
            {
                System.out.println("Connection Successfull");
            }
        }
        catch (SQLException e)
        {
        System.out.println(e.getMessage());
        System.exit(0);
        }
   }

}

I am not getting any error, but when i run the program, i get:

No suitable driver found for mysql4.000webhost.com/a6136644_bustrac

what can be the issue?

EDIT: the a6136644_bustrac in the host url refers to the database