java - Return object from JComboBox -

i guess real newbie question cant find answers here, in java-book or elsewhere.

i'm trying build gui using swing can register different kinds of wine. want wine-class (there wine super class , 3 sub classes: red, white , rose) consist of both strings , integers (name, year etc.) , bunch of objects country, district, house , more.

i create wine object jpanel consisting of jtextarea name , jcombobox country, populate combo box using loop collects name variable object country that's stored in arraylist.

here form rose wine, others same.

class rosewineform extends jpanel {     private jtextfield winename = new jtextfield(15);    private jcombobox countrybox = new jcombobox();     public rosewineform() {        jpanel line1 = new jpanel();        setlayout(new boxlayout(this, boxlayout.y_axis));        line1.add(new jlabel("namn: "));        line1.add(winename);        add(line1);         jpanel line2 = new jpanel();        line2.add(new jlabel("ursprungsland"));        line2.add(countrybox);        for(country c : listofcountries) {        countrybox.additem(c.getcountryname());        }        add(line2);   }    public string getname() {       return winename.gettext();   }    public country getcountry() {       return ;   }} 

here actionlistener sends user forms

class newwinelistener implements actionlistener {  public void actionperformed (actionevent a) {      try {          jcombobox winecolor = (jcombobox) a.getsource();          if (winecolor.getselectedindex() == 0) {              redwineform red = new redwineform();              int answer = joptionpane.showconfirmdialog(testvin.this, red, "nytt rött vin",                 joptionpane.ok_cancel_option);          } else if (winecolor.getselectedindex() == 1) {              whitewineform white = new whitewineform();              int answer = joptionpane.showconfirmdialog(testvin.this, white, "nytt vitt vin",                 joptionpane.ok_cancel_option);          } else {              rosewineform rose = new rosewineform();              int answer = joptionpane.showconfirmdialog(testvin.this, rose, "nytt rosé vin",                 joptionpane.ok_cancel_option);          }      } catch (numberformatexception e) {             joptionpane.showmessagedialog(testvin.this, "fel inmatning!");         }     } 

here country class:

public class country {  private string countryname;  public country(string countryname) {     this.countryname = countryname; }  public string getcountryname() {     return countryname; }  public void setcountryname(string newcountryname) {     if ( newcountryname == null || newcountryname.trim().isempty()) {        system.out.println("you have set name.");            }  else {     countryname = newcountryname;     }}      public string tostring() {     return countryname;           } } 

my question is: when select country name in combo box how return object , not string called countryname can create wine object variables string name , country country?

hope can have understanding there swedish in there.

instead of adding country name doing now, need add country object itself, fine:

public rosewineform() {        jpanel line1 = new jpanel();        setlayout(new boxlayout(this, boxlayout.y_axis));        line1.add(new jlabel("namn: "));        line1.add(winename);        add(line1);         jpanel line2 = new jpanel();        line2.add(new jlabel("ursprungsland"));        line2.add(countrybox);        for(country c : listofcountries) {            //this trick            countrybox.additem(c);        }        add(line2);   } 

then in class "country" need override "tostring" method, believe doing fine, idea format code make more readable.

public class country {      private string countryname;      //constructor, getters , setters      @override     public string tostring() {         return this.countryname;     }  } 

and whenever want country object have selected, can just:

country selectedcountry = (country) countrybox.getselecteditem(); 

and id, name or other property need functionality wish implement.

hope helps.