Deck 12: Java-Fx: Gui Programming and Basic Controls

Question 1

An event handler class will not be executed unless it has been registered with the correct control.

Answer 1

True

Question 2

To add padding to an HBox you can call the __________ method.

A) HBoxPadding
B) SetHBoxPadding
C) setPadding
D) setHboxPad

Answer 2

C

Question 3

A(n) __________ is an action that takes place in an application, such as the clicking of a button.

A) instance
B) effect
C) case
D) event

Answer 3

D

Question 4

Programs that operate in a GUI environment must be __________.

A) event driven
B) in color
C) dialog boxes
D) layout managers

Question 5

Layout containers provide methods for fine-tuning the way controls are arranged.

Question 6

To display an image in a JavaFX application, you use either the Image or ImageView class.

Question 7

One important difference between the command line interface and a GUI interface is that __________.

A) in command line the background color of the monitor will always be black but in a GUI it can be any color
B) in a GUI environment the user determines the order in which things happen while the user has no control over the order or events in a command line interface
C) users must type information in a command line interface but, when using a GUI, typing is never required
D) All of these are important differences.

Question 8

When programming in JavaFX, you should think of the GUI objects as nodes in a tree-like hierarchical structure known as a scene graph.

Question 9

A GUI program automatically stops executing when the end of the main method is reached.

Question 10

When a splash screen is displayed, the application does not load and execute until the user clicks the splash screen image with the mouse.

Question 11

For this question, assume myView references an ImageView object. In order to preserve the image's aspect ratio (so it does not appear stretched or distorted), you should use which of the following?

A) myView.setPreserveRatio(false);
B) myView.setPreserveRatio(true);
C) myView.setPreserveRatio();
D) Either (a) or (c) would work.

Question 12

The BorderPane container always displays its content in five regions which are top, bottom, left, right, and center and each region must be used.

Question 13

Which of the following is not a way a user can interact with a computer?

A) command line
B) console interface
C) GUI
D) All of these are ways for a user to interact with a computer.

Question 14

The HBox object's setPadding method takes a(n) __________as its argument.

A) Insets method
B) Insets object
C) boolean
D) integer

Question 15

The __________ layout container arranges its contents with columns and rows.

A) GridLayout
B) GridPane
C) Grid
D) CellManager

Question 16

To display an image in a JavaFX application you must __________.

A) include either the Image or the ImageView class
B) include both the setImage and the ViewImage classes
C) include both the Image and the ImageView classes
D) include either the setImage or the ViewImage class

Question 17

To preserve an image's aspect ratio you can use the ImageView class's PreserveAspectRatio method.

Question 18

The command line interface is an event-driven interface.

Question 19

The Pos type must be imported from the javafx.geometry package.

Question 20

An event object is created when an event takes place.

Question 21

If a BorderPane region does not contain anything, __________.

A) the region will appear gray by default
B) the region will not appear in the GUI
C) an error will occur
D) content from an adjacent region will be duplicated to appear in the empty region

Question 22

The __________ layout container arranges the contents into cells, similar to a spreadsheet.

A) GRID
B) GridPane
C) GridPaneObj
D) CellPane

Question 23

What method do you call to register an event handler with a Button control?

A) setAction
B) onClickAction
C) setOnClick
D) setOnAction

Question 24

The process of connecting an event handler object to a control is called __________ the event handler.

A) passing
B) registering
C) applying
D) rendering

Question 25

To create a TextField control, you use the __________ class which is in the __________ package.

A) TextField, javafx.text.control
B) TextField, javafx.scene.control
C) TextBox, javafx.scene.control
D) TextField, javafx.textfield

Question 26

Which of the following statements correctly adds a label to the first row and second column of a GridPane object?

A) gridpane.add(myLabel, 1, 2);
B) gridpane.add(myLabel, 2, 1);
C) gridpane.add(myLabel, 0, 1);
D) gridpane.add(myLabel, 1, 0);

Question 27

In order to leave 15 pixels of space in an HBox container, use which of the following statements?

A) myhbox = setPadding(15);
B) myhbox.setPadding(15);
C) myhbox.setPadding.Insets(15);
D) myhbox.setPadding(new Insets(15));

Question 28

Which of the following import statements is required in order to write an event handler class?

A) import javafx.event.EventHandler;
B) import javafx.event.ActionEvent;
C) import javafx.EventHandler;
D) import javafx.EventHandler.event;

Question 29

The Application class's __________ method is the main entry point for a JavaFX application.

A) start
B) init
C) addWindow
D) mainFX

Question 30

Select all that apply. Which of the following are regions where content can be displayed in the BorderPane layout container?

A) top and bottom
B) center
C) above and below center
D) left and right

Question 31

Select all that apply. Which of the following file types are supported by the Image class?

A) BMP
B) JPEG
C) GIF
D) PNG

Question 32

Select all that apply. Given the statement shown below, which of the following statements are true? Scene scene = new Scene(hbox, 100, 500);

A) The width of the scene will be 100 pixels.
B) The height of the scene will be 100 pixels.
C) A Scene object named scene will be created.
D) The root node is hbox.

Question 33

Assuming three ImageView objects named puppy, kitten, and bunny have been created, what does the following statement do? HBox hbox = new HBox(5, puppy, kitten, bunny);

A) The number 5 refers to the number of ImageView objects so there will be two empty spots for two more ImageView objects.
B) There will be five pixels of space between the controls horizontally in the container.
C) The controls will be displayed vertically with five pixels between them.
D) The statement does nothing; it contains an error.

Question 34

When an event takes place, the control responsible for the event creates an event __________.

A) source
B) object
C) handler
D) firing

Question 35

What does the following statement do? Image puppy = new Image("file:C:\\images\terrier. jpg");

A) It creates an instance of the ImageView class with the terrier. jpg file passed to the constructor.
B) It loads an image named "images\terrier. jpg" and stores the image in the Image variable.
C) It loads an image file named terrier. jpg which is found in the images folder on the user's C-drive.
D) Nothing; it is not possible to include a path to a file when using the Image class.

Question 36

An action that takes place while a program is running is a(n) __________.

A) event source
B) event handler
C) event
D) event object

Question 37

Which of the following import statements is required in order to create a BorderPane layout container?

A) import javafx.scene.layout.Box;
B) import javafx.scene.layout;
C) import javafx.layout.scene.BorderPane;
D) import javafx.scene.layout.BorderPane;

Question 38

To retrieve text that a user has typed into a TextField control, you call the __________ method.

A) inputText
B) getInput
C) getText
D) getInputText

Question 39

Select all that apply. Which of the following are constructors of the BorderPane class?

A) BorderPane()
B) BorderPane(top, bottom)
C) BorderPane(center)
D) BorderPane(left, right)
E) BorderPane(center, top, right, bottom, left)

Question 40

If you set a scene's size to a width and height that is smaller than the width and height of the image to be displayed ___________.

A) only part of the image will be displayed
B) the image will only occupy part of the window
C) the scene will automatically be resized to fit the image
D) the image will automatically be resized to fit the window

Question 41

Select all that apply. It may be possible to simplify event handler code by using which of the following?

A) nested classes
B) anonymous inner classes
C) lambda expressions
D) listener expressions

Question 42

Select all that apply. Which of the following are nodes that can be used in a scene graph?

A) tree node
B) root node
C) leaf node
D) branch node