Java Swing DefaultListModel containing storing more information -

i created class store 2 properties

public class mailentry {     private string mail;     private mailformat format; // enum      public mailentry(string mail, mailformat format) {         this.mail = mail;         this.format = format;     }      public string getmail() {         return mail;     }      public mailformat getformat() {         return format;     } } 

the jlist created me netbeans gui declared by

    private javax.swing.jlist<string> jlist1; 

and initialized defaultlistmodel

private defaultlistmodel<mailentry> listmodel = new defaultlistmodel<>(); 

and set model

jlist1.setmodel(listmodel); 

but

 error: incompatible types: defaultlistmodel<mailentry> cannot converted listmodel<string>     jlist1.setmodel(listmodel); 

it seems jlist expects model of strings. i'd store more item-specific information, accessible through gui.

how can work around?

the problem you've decleared jlist1 as...

private javax.swing.jlist<string> jlist1; 

but you're declaring model as...

defaultlistmodel<mailentry> listmodel = new defaultlistmodel<>(); 

mailentry , string not compatible classes , jlist expecting listmodel<string> based model.

you need change jlist declaration support model, like

private javax.swing.jlist<mailentry> jlist1; 

since you're using netbean's form editor (don't me started), need select jlist "navigator"

select "code" tab "properties" tab...

and change type parameters meet requirements