JavaFX Editable ComboBox Demo

import javafx.application.Application;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TableView;
import javafx.stage.Stage;
import javafx.util.StringConverter;

public class ComboBoxDemo extends Application{

    public class SimplePerson {
        private StringProperty name;
        private String somethingElse;

        public SimplePerson(String name) {
            setName(name);
        }

        public final void setName(String value) { nameProperty().set(value); }
        public String getName() { return nameProperty().get(); }

        public StringProperty nameProperty() {
            if (name == null) name = new SimpleStringProperty(this, "name");
            return name;
        }
    }

    final ObservableList<SimplePerson> persons = FXCollections.observableArrayList(
            new SimplePerson("Jacob"),
            new SimplePerson("Isabella"),
            new SimplePerson("Ethan"),
            new SimplePerson("Emma"),
            new SimplePerson("Michael")
    );

    @Override
    public void start(Stage stage) throws Exception {


        final ComboBox<SimplePerson> cb = new ComboBox<>();
        cb.setItems(persons);
        cb.setEditable(true);
        cb.setConverter(new StringConverter<SimplePerson>() {

            @Override
            public String toString(SimplePerson p)
            {
                if(p != null)
                    return p.getName();
                return "";
            }

            @Override
            public SimplePerson fromString(String name)
            {
                if(cb.getValue() != null)
                {
                    ((SimplePerson)cb.getValue()).setName(name);
                    cb.show();
                    return (SimplePerson)cb.getValue();
                }
                return null;
            }
        });

        cb.getEditor().setOnAction(e -> {
            SimplePerson person = cb.getSelectionModel().getSelectedItem();
            if (null != person) {
                person.setName(cb.getEditor().getText());
            } else {
                SimplePerson p = new SimplePerson(cb.getEditor().getText());
                cb.getItems().add(p);
                cb.getSelectionModel().select(p);
            }
        });

        stage.setScene(new Scene(cb));
        stage.show();

    }

    public static void main(String[] args) { launch(args); }

}