Deck 11: 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

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.

Answer 2

B

Question 3

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

Answer 3

False

Question 4

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 5

The command line interface is an event-driven interface.

Question 6

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 7

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

Question 8

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

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

Question 9

The "preferred size" of a scene is usually the whole size of the user's monitor.

Question 10

The foundation of a GUI application is the

A) Stage object
B) start method
C) Application class
D) Scene object

Question 11

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 12

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

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

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 a user can interact with a computer.

Question 14

An event object is created when an event takes place.

Question 15

Padding is space that appears around the inside edges of a container.

Question 16

To change the alignment of an HBox you call the

A) setAlignment method
B) Alignment method
C) PreferredSize method
D) Pos method

Question 17

In a JavaFX application, you are limited to a single layout container since layout containers cannot be nested.

Question 18

All JavaFX applicatons must extend the Application class.

Question 19

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

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

Question 20

In memory, GUI objects in a __________ are organized as __________ in a tree-like hierarchical data structure.

A) node, scenes
B) scene graph, nodes
C) scene, nodes
D) scene graph, methods

Question 21

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 22

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 23

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 24

Select all that apply. Which of the following are operations that can be performed by the launch method?

A) creating a Stage object
B) calling the start method
C) calling the Application constructor
D) calling an event handler

Question 25

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 26

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 27

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 28

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 29

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 30

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 31

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 32

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 33

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 34

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

A) Root
B) Button
C) Leaf
D) Branch

Question 35

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 36

Which package contains the Insets class?

A) javafx.scene
B) javafx.layout
C) javafx.Insets
D) javafx.geometry

Question 37

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

A) It creates an instance of the ImageView class with the terrier. J p g file passed to the constructor.
B) It loads an image named "images\terrier.j p g " and stores the image in the Image variable.
C) It loads an image file named terrier. j p g 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 38

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

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

Question 39

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 40

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

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