英文:
What is the "point" of root node in JavaFX?
问题
为什么 Scene 对象需要具有一个根节点？为什么 Scene 对象不能仅作为节点集合的占位符，而不将它们嵌套在根节点之下？
英文:
Why Scene object needs to have a root node? Why Scene object can't be just a placeholder for collection of nodes without them being nested under the root one?
答案1
得分: 4
"From Understanding the JavaFX Architecture
The JavaFX scene graph ... is a hierarchical tree of nodes that represents all of the visual elements of the application's user interface
A tree of nodes must have a single, root node.
Each node must have a parent node – except, of course, for the root node.
英文:
From Understanding the JavaFX Architecture<sup>1</sup>
> The JavaFX scene graph ... is a hierarchical tree of nodes that represents all of the visual elements of the application's user interface
A tree of nodes must have a single, root node.
Each node must have a parent node – except, of-course, for the root node.
<sup>1</sup> Part of Oracle's JavaFX tutorials.
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