int n = Integer.parseInt(sn);
Bernoulli bernoulli = null;
PrintWriter out = res.getWriter();
try {
Interface obj = (Interface)Naming.lookup("//"+host+":"+port+"/Bernoulli");
bernoulli = obj.bernoulli(n);
}
catch (Exception e) {
System.out.println(e.getMessage());
System.exit(1);
}