How to set "muc#roomconfig_maxusers"

Smack Smack Dev
1 
// Option op = new Option("muc#roomconfig_maxusers","50");
                                                  // FormField ff = new FormField();
                                                  // ff.setLabel("muc#roomconfig_maxusers");
                                                  // ff.addValue("50");
                                                  // submitForm.addField(ff);
                                                  // submitForm.setAnswer("muc#roomconfig_maxusers", 50);
                                                  submitForm.setAnswer(
                                                                      "muc#roomconfig_passwordprotectedroom", true); =============================================================
submitForm.setAnswer("muc#roomconfig_maxusers", 50);
submitForm.setAnswer("muc#roomconfig_maxusers", "50");

how can i set the the label “muc#roomconfig_maxusers” of a value “50”?

the type is list-single

values:0 -10 -20-30-40-50

i get a error like “java.lang.IllegalArgumentException: This field is not of type int.” or

“java.lang.IllegalArgumentException: This field is not of type String.”

2

oh…

just like :

List list = new ArrayList();

list.add(“50”);

submitForm.setAnswer(“muc#roomconfig_maxusers”, list);