Java™ How To Program (Early Objects), Tenth Edition

Section 25.3 JavaFX App Window Structure

• 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 scene that defines the GUI as a scene graph—a tree 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), which defines common attributes and behaviors for all nodes in the scene graph.

• The first node in the scene graph is known as the root node.

• Nodes that have children are typically layout containers that arrange their child nodes ...