CODEWITHSUNDEEP
javaswingclassjcombobox
hectorviov
hectorviov

Reputation: 77

How to render my own class correctly in a JComboBox?

I want to fill a JComboBox using a DefaultComboBoxModel.

static JComboBox<Carta> cmb_cartas;
static DefaultComboBoxModel<Carta> mdl_cartas;

I fill the DefaultComboBoxModel with an ArrayList of my own class "Carta"

ArrayList<Carta> cartas = conOAD.getCartasPorAgregar(idConjunto);

mdl_cartas = new DefaultComboBoxModel<Carta>();

for(int i = 0; i < cartas.size(); i++) {
    Carta carta = cartas.get(i);
    mdl_cartas.addElement(carta);
}
cmb_cartas = new JComboBox<>(mdl_cartas);

The combobox is filled correctly but the problem is that the text of the options are displaying: "modelos.Carta@3e7e084e"

How can is set the text to be the attribute "nombre" of my class "Carta"?

Upvotes: 0

Views: 127

Answers (1)

Duncan Jones
Duncan Jones

Reputation: 69339

You could override the toString method for your Carta class.

@Override
public String toString() {
  return this.nombre; // assumes nombre is a string
}

However, many people (rightly) frown on abusing the toString method for GUI display purposes. You could instead create a custom ListCellRenderer to render the text you want for each object.

Upvotes: 3

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