初学android的有关问题

ArrayList<UserInfo> userList = new ArrayList<UserInfo>();

public class UserInfo {    // 用户名    private String userName;    // 密码    private String passWord;    // 是否保存用户名    private int save_username;    // 是否保存密码    private int save_password;    // 是否自动登陆    private int auto_logon;    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 int getSave_username() {        return save_username;    }    public void setSave_username(int save_username) {        this.save_username = save_username;    }    public int getSave_password() {        return save_password;    }    public void setSave_password(int save_password) {        this.save_password = save_password;    }    public int getAuto_logon() {        return auto_logon;    }    public void setAuto_logon(int auto_logon) {        this.auto_logon = auto_logon;    }}