Which of the following JavaFX components is a leaf ?

Question

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 ?

查看解析

登录即可查看完整答案

类似问题

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单