getConnection -> localhost is unknown!?

[Martin]

I have installed JDK 1.4.2, Connector 3.1.8a and when I load the driver everything's fine.
But when I try to connect to a database, it always says that it couldn't find the host. I have tried localhost, 127.0.0.1, my internal network IP, but i can't get a connection.

I don't think that this could really be a network problem, because everything else is ok. But I don't know. Perhaps somebody has experienced the same problem and could give me a little advice.

Here is my Java program:
I import java.sql.*

try {
// The newInstance() call is a work around for some
// broken Java implementations

Class.forName("com.mysql.jdbc.Driver").newInstance();
}
catch (Exception ex) {
// handle the error
System.out.println("EXCEPTION: " + ex.getMessage());
}

try {
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql?user=root&password=mypass");
System.out.println("Got a Connection.");


conn.close();
}
catch (Exception ex) {
// handle the error
System.out.println("EXCEPTION: " + ex.getMessage());
}