JavaFX ComboBox displaying object not it's property - javafx

Question

i have built GUI with combo box. I have ObservableList<SimpleTableObject> types
which should display types of material. It looks like this
material_comboBox_type.getItems().addAll(types);
material_comboBox_type.setCellFactory((ListView<SimpleTableObject>
param) -> {
final ListCell<SimpleTableObject> cell = new
ListCell<SimpleTableObject>() {
#Override
public void updateItem(SimpleTableObject item, boolean empty) {
super.updateItem(item, empty);
if (item != null) {
setText(item.getName().get());//return String, actuall name of material
}
else {
setText(null);
}
}
};
return cell;
});
Now the problem is this: when i click combobox, it shows names as desired. But when i select one, instead of the string property, an object itself is displayed, which looks like that classes.SimpleTableObject#137ff5c.
How can I achieve it?

Answer 1

The selected item in a combo box is displayed in a cell called the buttonCell. So you need to set the button cell as well as the cell factory (which generates the cells in the dropdown).
To do this, it's probably easier to refactor your cell implementation as a (named) inner class:
private static class SimpleTableObjectListCell extends ListCell<SimpleTableObject> {
#Override
public void updateItem(SimpleTableObject item, boolean empty) {
super.updateItem(item, empty);
if (item != null) {
setText(item.getName().get());//return String, actuall name of material
}
else {
setText(null);
}
}
}
And then:
materialComboBoxType.setCellFactory(listView -> new SimpleTableObjectListCell());
materialComboBoxType.setButtonCell(new SimpleTableObjectListCell());

Answer 2

Ok, i did this with converter:
material_comboBox_type.setConverter(new StringConverter<SimpleTableObject>() {
#Override
public String toString(SimpleTableObject object) {
return object.getName().get();
}
#Override
public SimpleTableObject fromString(String string) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
});