Explain JavaFX Scene Graph

In JavaFX, the GUI Applications were constructed using a Scene Graph. A scene graph is a data structure similar to tree, in modern graphical applications. It is the starting point of the application, and it is a collection of nodes

To display something in JavaFX You need to construct a scene graph using the nodes and set it to an object of the Stage class, the top level container of a JavaFX application.

A node is a visual/graphical primitive object of a JavaFX application.

  • Each node in the scene graph has a single parent, and the node which does not contain any parents is known as the root node.

  • In the same way, every node has one or more children, and the node without children is termed as leaf node; a node with children is termed as a branch node.

  • A node instance can be added to a scene graph only once. The nodes of a scene graph can have Effects, Opacity, Transforms, Event Handlers, Event Handlers, Application Specific States.

In a JavaFX application the javafx.scene.Scene class holds all the contents of a scene graph. While creating a scene it is mandatory to specify the root node.