ListViewUpdate.java

import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

import javafx.application.Application;
import javafx.beans.Observable;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;

public class Main extends Application {
  @Override
  public void start(Stage primaryStage) {
    try {
      BorderPane root = new BorderPane();

      ListView<Item> list = new ListView<>();
      final Random rng = new Random();

      // twenty items with random prices
      final List<Item> items = IntStream.range(1, 20)
          .mapToObj(i -> new Item("Item " + i, rng.nextDouble() * 100))
          .collect(Collectors.toList());

      list.setItems(FXCollections.observableList(items, 
          item -> new Observable[] { item.nameProperty(), // This is the extractor:
          item.priceProperty() })); // list will fire updates if the name or price change

      Button button = new Button("Increase prices");
      button.setOnAction(event -> list.getItems().forEach( // Add 10% to
          item -> item.setPrice(item.getPrice() * 1.1))); // all prices
      HBox controls = new HBox(button);
      controls.setPadding(new Insets(10));
      controls.setAlignment(Pos.CENTER);

      root.setCenter(list);
      root.setBottom(controls);

      Scene scene = new Scene(root, 400, 400);
      primaryStage.setScene(scene);
      primaryStage.show();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static class Item {
    private final StringProperty name = new SimpleStringProperty(this, "name");

    public final String getName() {
      return name.get();
    }

    public final void setName(String name) {
      this.name.set(name);
    }

    public final StringProperty nameProperty() {
      return name;
    }

    private final DoubleProperty price = new SimpleDoubleProperty(this, "price");

    public final double getPrice() {
      return price.get();
    }

    public final void setPrice(double price) {
      this.price.set(price);
    }

    public final DoubleProperty priceProperty() {
      return price;
    }

    public Item(String name, double price) {
      this.setName(name);
      this.setPrice(price);
    }

    @Override
    public String toString() {
      return String.format("%s $%.2f", name.get(), price.get());
    }
  }

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