This works!
Properties properties = new Properties();
properties.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.provider.url","jnp://localhost:1099");
properties.put("java.naming.factory.url.pkgs", "org.jboss.naming
rg.jnp.interfaces");
InitialContext ctx = new InitialContext(properties);
Thanks