java - Display attribute in JComboBox and register another attribute -

i have jcombobox , must show designation of product, , each has code designation, in database have register product code in combo must show designation, how should display designation in combo save code in database?

this code return code , designation

    public resultset getdesignation(jcombobox des) { resultset rs1 = null;   try {  conn=con.connect();  stmt = conn.createstatement(); string rq1 = "select designation, idproduit   produit";  rs1 = stmt.executequery(rq1); while (rs1.next()) { des.additem(rs1.getstring(1));  } stmt.close();  conn.close();  }  catch (sqlexception e) {  e.printstacktrace(); } finally{   return rs1; } } 

and code idproduct (code)

m.getdesignation(des);  int designation=integer.parseint(des.getselecteditem().tostring()); 

instead of direct population of jcombobox, create product class , in each iteration of while loop extract id , product's name resultset , set properties of product instance. add product instance in collection arraylist , use populate jcombobox:

public class product {      private int idproduct;      private string name;       public product(int idproduct, string name) {         this.idproduct = idproduct;         this.name = name;     }      public int getidproduct() {         return idproduct;     }      public void setidproduct(int idproduct) {         this.idproduct = idproduct;     }      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      @override     public string tostring() {         return name;     } } 

set defaultcomboboxmodel jcombobox , add data model:

import javax.swing.*; import java.awt.event.itemevent;  public class combodemo {     public static void main(string[] args) {         jcombobox<product> combobox = new jcombobox<>();         defaultcomboboxmodel<product> defaultcomboboxmodel = new defaultcomboboxmodel<>();         combobox.setmodel(defaultcomboboxmodel);         defaultcomboboxmodel.addelement(new product(1, "apples"));         defaultcomboboxmodel.addelement(new product(2, "oranges"));          combobox.additemlistener(e -> {             if (e.getstatechange() == itemevent.selected) {                 product product = (product) combobox.getselecteditem();                 system.out.println(product.getname() + " ::: " + product.getidproduct());             }         });          joptionpane.showmessagedialog(null, combobox);     } } 

add itemlistener on jcombobox , use getselecteditem obtain product jcombobox. basically, in case, jcombobox contains product items properties instead of string's in case.