Which of the following JavaFX components is a leaf ?

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BlackTom AI · Accepted Answer

Question restatement: Which of the following JavaFX components is a leaf ?

Note: The provided data lists the correct answer as TextField, but the set of answer options is empty in the payload. Despite the missing options, we can still reason about why TextField is considered a leaf in JavaFX.

Understanding the concept: In JavaFX, a leaf node is a Node that does not have any children. Only certain nodes (those that extend Parent) can contain other nodes as children. Leaves are typically simple controls or shapes that do not host nested components.

Option analysis (based on the implied correct answer being TextField):
- TextField: This is a standard single-line text input control. It is a Node that does not act as a container and does not have children, so it qualifies as a leaf in the scene graph. It does not implement any container behavior for hosting other nodes.

Why this makes sense in contrast to non-leaf possibilities (general guidance):
- Non-leaf/Container-like components (e.g., layout panes such as VBox, HBox, StackPane, Pane, etc.): These extend Parent and are capable of holding child nodes. They are not leaves because they manage children in the scene graph.
- Simple controls vs containers: Many UI controls (like Button, TextField, Label) are Nodes and do not necessarily host children, but the common distinction for leaf status comes from whether the node is a container (Parent) or not. TextField does not host children, so it is a leaf.

Summary: The rationale for labeling TextField as a leaf rests on the definition that a leaf Node is one that has no children in the JavaFX scene graph, and TextField fits that definition as it is a standalone input control without child nodes. The absence of answer options in the provided data prevents a step-by-step check against each listed choice, but the core concept remains: leaf = no children, and TextField satisfies that criterion.

32555 Fundamentals of Software Development - Autumn 2025 Week 11 Practice Quiz

Which of the following JavaFX components is a leaf ?

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