Lecture 3

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Questions and Answers

Which interface must a class implement to serve as a layout manager in Java?

`ComponentListener`
`ContainerAdapter`
`LayoutManager` (correct)
`LayoutAdapter`

What is the primary role of a layout manager in GUI design?

To define the look and feel of the application.
To handle data binding between the UI and the application logic.
To manage event handling for components.
To control the size and position of components within a container. (correct)

If a layered pane doesn't have a layout manager by default, what happens when components are added to it?

Components are not displayed.
An error is thrown if no layout manager is specified.
Components are stacked on top of each other at the same position. (correct)
Components are automatically arranged in a grid layout.

What should a developer consider when organizing their code, especially concerning layouts in GUI design?

The module organization of their code. (B) Signup and view all the answers

If you want to define specific layouts after creating a content pane, what method should typically be used?

<code>pane.setLayout(new BorderLayout());</code> (B) Signup and view all the answers

A developer wants to ensure a popup window appears above all other components in a Swing application. Which layer should they use?

<code>POPUP_LAYER</code> (A) Signup and view all the answers

In a Swing application, which layer is most appropriate for displaying a modal internal frame dialog?

<code>MODAL_LAYER</code> (A) Signup and view all the answers

A custom component is added to a `JLayeredPane` without specifying its layer. Which layer will the component be placed in by default?

<code>DEFAULT_LAYER</code> (B) Signup and view all the answers

Which layer is best suited for floating toolbars or palettes in a Swing application?

<code>PALETTE_LAYER</code> (A) Signup and view all the answers

When a component is being dragged within a Swing application using a `JLayeredPane`, which layer is most appropriate to use?

<code>DRAG_LAYER</code> (A) Signup and view all the answers

The root pane of a Swing application adds the menu bar and content pane to its layered pane at a specific depth. Which layer is used for this purpose?

<code>FRAME_CONTENT_LAYER</code> (A) Signup and view all the answers

What integer value is associated with the `POPUP_LAYER`?

300 (C) Signup and view all the answers

Which of the following statements best describes the primary function of the `JLayeredPane` in Swing?

To provide depth to components by arranging them in layers. (B) Signup and view all the answers

In Swing, what role does the `contentPane` play within the root pane?

It serves as the primary container for adding components, determining how they are organized and displayed. (D) Signup and view all the answers

When designing a GUI in Swing, how would you typically access the `contentPane` to add components?

By calling the <code>getContentPane()</code> method on the <code>JFrame</code> or <code>JApplet</code> object. (D) Signup and view all the answers

In JavaFX, what is the purpose of the `BorderPane` layout?

Divides the layout into five regions: top, bottom, left, right, and center. (D) Signup and view all the answers

Which JavaFX layout is most suitable for arranging a series of buttons in a horizontal row?

HBox (A) Signup and view all the answers

What is the primary function of the `setPadding()` method in JavaFX layouts like `HBox` and `VBox`?

To add empty space around the edges of the layout pane. (B) Signup and view all the answers

What is the main difference between `HBox` and `VBox` layouts in JavaFX?

<code>HBox</code> arranges nodes horizontally, while <code>VBox</code> arranges them vertically. (D) Signup and view all the answers

In JavaFX, what layout would be most appropriate for creating a form with labels and corresponding text fields organized in rows and columns?

GridPane (D) Signup and view all the answers

What does the `setStyle()` method do when applied to a layout pane in JavaFX, such as an `HBox` or `VBox`?

It applies CSS styles to customize the appearance of the layout pane. (C) Signup and view all the answers

Which layout manager in Swing automatically places components from left to right, adding more rows as necessary?

FlowLayout (A) Signup and view all the answers

Which of the following statements best describes the purpose of layout managers in GUI programming?

They define the size and position of components within a container. (D) Signup and view all the answers

Flashcards

What is a Layout Manager?

An object that implements the LayoutManager interface and determines the size and position of components within a container.

How to set a layout?

A container can have its layout defined using pane.setLayout(…);