enum + select on Struts 2

[Mad Java]

Hello all! I'm having a problem with Struts 2 using select and enum

Lets say I have an Enum:

public enum Gender{

  MALE (0,"Male"), FEMALE (1, "Female");

  private String gender;
  private Integer id;

  //some code ommited

}   

I want to populate an select with it, but I can't do it! So please help! I'll post what I'm trying:

- The request Action

public void RequestAction {

  public Gender[] getGenderList {return Gender.values()}

  //more code ommited
}  

- The JSP

 <s:select name="gender" headerKey="-1" headerValue="" listKey="id" listValue="gender" list="genderList" label="Gender"/> 

- The result Action:

public void ResultAction {
  public void setGender (Gender g) {
    this.gender = g;
  }  
}

Ok, so this doesn't work because the select is returning the id as string, so I made a bad code:

public void ResultAction {
  public void setGender (String id) {
    this.gender = Gender.values()[Integer.parseInt (id)];
  }  
}

Well, this works with one enum, but in another enum in the same class it doesn't work anymore (don't ask me why).

Anyone has a better, good idea, how to use enums with select on Struts 2?!?! =(