Java Database Connectivity (JDBC)

i'm a newbie to jdbc and was trying out a basic program to connect to the database. i'm gettin the same
error msg as a few others were but still cant figure out whats wrong. my output to the program pasted below was:

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at Jdbc11.main(Jdbc11.java:12)

The program code i used was:

import java.sql.*;
import java.sql.DriverManager;


public class Jdbc11 {
public static void main(String args[]){
System.out.println(
"Copyright 2005, MK");
try {
Statement stmt;

Class.forName("com.mysql.jdbc.Driver"); //registering jdbc driver

//classes

String url =
"jdbc:mysql://localhost:3306/mysql";
Connection con = DriverManager.getConnection(url,"root", "");

System.out.println("URL: " + url);
System.out.println("Connection: " + con);

stmt = con.createStatement();

stmt.executeUpdate(
"CREATE DATABASE JunkDB");
stmt.executeUpdate(
"GRANT SELECT,INSERT,UPDATE,DELETE," +
"CREATE,DROP " +
"ON JunkDB.* TO 'auser'@'localhost' " +
"IDENTIFIED BY 'drowssap';");

con.close();
} //end try
catch( Exception e ) {
e.printStackTrace();
}//end catch

}//end main
}//end class Jdbc11

i've included the sqldriver jar file (mysql-connector-java-3.1.8-bin.jar) in C:\j2sdk1.4.2_08\jre\ext . isn't that sufficient? is there a difference in the commands to run this program or?
please help! :/