25.3 JavaFX App Window Structure
A JavaFX app window consists of several parts (Fig. 25.1) that you’ll use in Sections 25.4–25.5:
Fig. 25.1 | JavaFX app window parts.
• The window in which a JavaFX app’s GUI is displayed is known as the stage and is an instance of class Stage (package javafx.stage).
• The stage contains one active scene that defines the GUI as a scene graph—a tree data structure of an app’s visual elements, such as GUI controls, shapes, images, video, text and more. The scene is an instance of class Scene (package javafx.scene).
• Each visual element in the scene graph is a node—an instance of a subclass of Node (package javafx.scene ...
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