Java Database Connectivity (JDBC)

hi everybody,
i have a question here.
i am trying to connect to mysql database with eclipse. i had downloaded the mysql-connector-java-5.1.5 file. i am able to load the class but the next line drivermanager.getconnection is not working. it is not throwing any exception. if i change the database name then it shows "unknown database" error.
my code is:



import java.sql.*;
public class jdbcclass
{
public static void main(String[] args)
{

Connection con=null;
Statement st=null;
ResultSet rs=null;
try
{

String username="admin";
String password="admin";
String url = "jdbc:mysql://localhost:3306/lushdb";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
System.out.println("class loaded succesfully");
System.out.println("con="+con);
con = DriverManager.getConnection (url,username,password );
System.out.println ("Database connection established");
}
catch (Exception e)
{
e.printStackTrace();
System.err.println ("Cannot connect to database server");
}
}
}
output:
class loaded successfully
con=null

i tried all other codes but same result class loading , database is not connecting.
i copied mysql-connector-java-5.1.5-bin.jar file to /../myproject/webroot/web-inf/lib folder... then only i am able to load atleast the class...... i think i have change some setting in eclipse . can anybody suggest me what to do n how to do. please help me out.