retreive value in selectbox in struts2
private String userName;

private String password;

private String gender;

private String about;

private String country;




private ArrayList<Country> countryList;

private String[] community;

private ArrayList<String> communityList;

private Boolean  mailingList;

public String populate() {

    countryList = new ArrayList<Country>();
    countryList.add(new Country(1, "India"));
    countryList.add(new Country(2, "USA"));
    countryList.add(new Country(3, "France"));

    communityList = new ArrayList<String>();
    communityList.add("Java");
    communityList.add(".Net");
    communityList.add("SOA");

    community = new String[]{"Java",".Net"};
    mailingList = true;

    return "populate";
}

@Override
public String execute() {
    return SUCCESS;
}

public String getUserName() {
    return userName;
}

public void setUserName(String userName) {
    this.userName = userName;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public String getGender() {
    return gender;
}

public void setGender(String gender) {
    this.gender = gender;
}

public String getAbout() {
    return about;
}

public void setAbout(String about) {
    this.about = about;
}

public String getCountry() {
    return country;
}

public void setCountry(String country) {
    this.country = country;
}

public ArrayList<Country> getCountryList() {
    return countryList;
}

public void setCountryList(ArrayList<Country> countryList) {
    this.countryList = countryList;
}

public String[] getCommunity() {
    return community;
}

public void setCommunity(String[] community) {
    this.community = community;
}

public ArrayList<String> getCommunityList() {
    return communityList;
}

public void setCommunityList(ArrayList<String> communityList) {
    this.communityList = communityList;
}

public Boolean getMailingList() {
    return mailingList;
}

public void setMailingList(Boolean mailingList) {
    this.mailingList = mailingList;
}

<s:select name="country" list="countryList" listKey="countryId"
    listValue="countryName" headerKey="0" headerValue="Country"
    label="Select a country" />

Country: <s:property value="country" /><br>

private ArrayList<Country> communityList;

<s:iterator value="countryList"> <!-- here myList contains the list of objects -
     <s:property value="countryName" /><br/>
     <s:property value="countryId" /><br/>
   </s:iterator>

<s:select name="country" list="countryList" listKey="countryName" listValue="countryName" headerKey="0" headerValue="Country" label="Select country" />