1. JavaFX Tutorial
2. JavaFX Overview
3. Your First JavaFX Application
4. JavaFX Stage
5. JavaFX Scene
6. JavaFX Node
7. JavaFX Properties
8. JavaFX FXML
9. JavaFX CSS Styling
10. JavaFX ImageView
11. JavaFX Text
12. JavaFX Fonts
13. JavaFX Hyperlink
14. JavaFX Label
15. JavaFX Button
16. JavaFX MenuButton
17. JavaFX SplitMenuButton
18. JavaFX ToggleButton
19. JavaFX RadioButton
20. JavaFX CheckBox
21. JavaFX ChoiceBox
22. JavaFX ComboBox
23. JavaFX ListView
24. JavaFX DatePicker
25. JavaFX ColorPicker
26. JavaFX TextField
27. JavaFX PasswordField
28. JavaFX Slider
29. JavaFX TextArea
30. JavaFX ToolBar
31. JavaFX Tooltip
32. JavaFX ProgressBar
33. JavaFX FileChooser
34. JavaFX DirectoryChooser
35. JavaFX Accordion
36. JavaFX TitledPane
37. JavaFX SplitPane
38. JavaFX TabPane
39. JavaFX ScrollPane
40. JavaFX Group
41. JavaFX Region
42. JavaFX Pane
43. JavaFX HBox
44. JavaFX VBox
45. JavaFX Separator
46. JavaFX FlowPane
47. JavaFX TilePane
48. JavaFX GridPane
49. JavaFX MenuBar
50. JavaFX ContexMenu
51. JavaFX WebView
52. JavaFX PieChart
53. JavaFX TableView
54. JavaFX TreeView
55. JavaFX TreeTableView
56. JavaFX HTMLEditor
57. JavaFX Pagination
58. JavaFX BarChart
59. JavaFX StackedBarChart
60. JavaFX ScatterChart
61. JavaFX LineChart
62. JavaFX AreaChart
63. JavaFX StackedAreaChart
64. JavaFX Color
65. JavaFX 2D
66. JavaFX Effects
67. JavaFX 3D
68. JavaFX Transformation
69. JavaFX Animation
70. JavaFX Media - JavaFX Video and Audio Support
71. JavaFX Canvas
72. JavaFX Drag and Drop
73. JavaFX Concurrency

• JavaFX Property Example

A JavaFX Property is a special kind member variable of JavaFX controls. JavaFX properties are typically used to contain control properties such as X and Y position, width and height, text, children and other central properties of JavaFX controls. You can attach change listeners to JavaFX properties so other components can get notified when the value of the property changes, and you can bind properties to each other so when one property value changes, so does the other. In this JavaFX property tutorial I will explain how JavaFX properties work, and how to use them.

JavaFX Property Example

Here is a JavaFX GUI example showing how to access the widthProperty and prefWidthProperty of a JavaFX Pane, as well as adding a change listener to both. Notice how one of the change listeners is implemented as an anonymous Java class, and the other as a Java Lambda Expression. This is just to show you two different ways of achieving the same goal of attaching an event listener to a JavaFX property.

import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.ReadOnlyDoubleProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class PropertyExample extends Application {

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

  public void start(Stage primaryStage) {

    Pane pane = new Pane();

    ReadOnlyDoubleProperty widthProperty = pane.widthProperty();
    widthProperty.addListener( new ChangeListener<Number> (){
      @Override
      public void changed(
        ObservableValue<? extends Number> observableValue,
        Number oldVal, Number newVal) {

          System.out.println("widthProperty changed from "
            + oldVal.doubleValue() + " to " + newVal.doubleValue());
      }
    });


    DoubleProperty prefWidthProperty = pane.prefWidthProperty();
    prefWidthProperty.addListener(
      (ObservableValue<? extends Number> prop,
        Number oldVal, Number newVal) -> {

        System.out.println("prefWidthProperty changed from "
          + oldVal.doubleValue() + " to " + newVal.doubleValue());
    });

    prefWidthProperty.set(123);

    Scene scene = new Scene(pane, 1024, 800, true);
    primaryStage.setScene(scene);
    primaryStage.setTitle("2D Example");

    primaryStage.show();
  }
}

When the instruction prefWidthProperty.set(123); is called, the prefWidthProperty change listener will get called. Additionally, every time the UI is resized then the Pane is resized too, and the widthProperty change listener will get called.