Rmi connection refused with localhost

Question

I have a problem using java rmi:

When I\'m trying to run my server, I get a connectException (see below).

Exception happens when executing the rebind method:

Answer 1

It seems to work when I replace the

Runtime.getRuntime().exec("rmiregistry 2020");

by

LocateRegistry.createRegistry(2020);

anyone an idea why? What's the difference?