Strange FacesException

Question

Plz all,
I just try to develop first JSF app. But I've problem in it.
I've bean called UserNumber, it has one property called number, setter and getter.
When i run application this Exception appeared
"Can't set managed bean property: 'number'"
Why this ?

Answer 1

Thanks for reply,
Type object of what ?
yes, I defined it in faces-config.xml.
But i didn't mention that this bean has an operation called logon( ).
This is the code of UserNumber
public class UserNumber {
      int number;
     public UserNumber(){
     public int getNumber() {
          return number;
     public void setNumber(int userNumber) {
          this.number = userNumber;
     public String logon(){
          if(number == 9)
               return "Success";
          else
               return "Fail";
}