Working with the Property API

In addition to the regular getters and setters, JavaFX provides a Property API to almost all its classes' fields.

For example, there are the following methods to work with the Stage title: 

String getTitle();              //getter
void setTitle(String title);    //setter 
StringProperty titleProperty(); //property access

Technically, getters and setters are not required, and the Property value can be used all the time. 

The Property class has the following two important APIs—Observable and Binding.

Using the Observable API

An Observable is an interface which allows you to subscribe to the change event of the corresponding property. All JavaFX properties are observable, thus you can track changes of every small parameter of every JavaFX node using the Observable API.

Let's take a look at the next simple example, which dynamically updates the width of the JavaFX application's window.

The window, represented by the Stage class, has a property called widthProperty, which...