> private static final String dbUrl = "jdbc:postgresql:demo"; .
> private static final String dbUrl =
> "jdbc:postgresql//wetwang.ontko.com/demo";
AFAIK, "jdbc:postgresql://host/database", so there is a ":" missing.
Hope that helps.
Antonio
P.S. My e-mail addres may not be good: remove any "panam0." from it, if
present.