Deck 6: Graphical User Interfaces

Question 1

A panel is displayed as a separate window, but a frame can only be displayed as part of another container.

Answer 1

False
Explanation: A frame is displayed as a separate window, but a panel can only be displayed as part of another container.

Question 2

Which of the following layout managers organize the components from left to right, starting new rows as necessary?

A) Border Layout
B) Box Layout
C) Card Layout
D) Flow Layout
E) Grid Layout

Answer 2

D
Explanation: The flow layout organizes components from left to right, starting new rows as necessary. A border layout organizes components into five areas: north, south, east, west, and center. The box layout organizes components into a single row or column. The card layout organizes components into one area such that only one is visible at any time. A grid layout organizes components into a grid of rows and columns.

Question 3

Which of the following components can be toggled on or off using the mouse, indicating that a particular boolean condition is set or unset?

A) check box
B) radio button
C) slider
D) dialog box
E) none of the above

Answer 3

A
Explanation: A check box can be toggled on or off using the mouse indicating that particular boolean condition is set or unset. A radio button represents a set of mutually exclusive options. A slider represents a range of values and a dialog box is a graphical window that pops up and allows the user to interact with the program.

Question 4

Which of the following classes play a role in altering a visual aspect of a component?

A) ColorChooser
B) ToolTip
C) BorderFactory
D) ColorCreator
E) none of the above

Question 5

Which of the following event descriptions best describes the mouse entered event?

A) The mouse button is pressed down
B) The mouse button is pressed down and released without moving the mouse in between
C) The mouse pointer is moved onto a component
D) The mouse button is released
E) The mouse is moved while the mouse button is pressed down

Question 6

Which of the following is a fundamental idea of good GUI design?

A) Know the user
B) Prevent user errors
C) Optimize user abilities.
D) Be consistent.
E) all of the above

Question 7

A container is goverened by a(n) __________________, which determines exactly how the components added to the panel will be displayed.

A) event
B) content pane
C) JFrame object
D) JPanel object
E) layout manager

Question 8

Which of the following best describes a timer component?

A) it starts when a GUI component is first initialized, and ends when it is destroyed
B) it generates action events at regular intervals
C) every object has a timer, and it is implicitly activated in the constructor of the object
D) it determines the amount of time it takes to execute a method
E) a timer cannot be considered a GUI component

Question 9

A(n) _______________________ is a graphical window that pops up on top of any currently active window so that the user can interact with it.

A) component
B) dialog box
C) event
D) listener
E) none of the above

Question 10

A(n) ____________________ is an object that waits for an event to occur and responds in some way when it does.

A) GUI
B) component
C) listener
D) frame
E) panel

Question 11

Which of the following represents a dialog box that allows the user to select a file from a disk or other storage medium?

A) color chooser
B) disk chooser
C) tool tip chooser
D) file chooser
E) none of the above

Question 12

A(n) ___________________ is an object that defines a screen element used to display information or allow the user to interact with a program in a certain way.

A) GUI
B) component
C) event
D) listener
E) AWT

Question 13

Which of the following components allows the user to select one of several options from a "drop down" menu?

A) check boxes
B) radio buttons
C) sliders
D) combo boxes
E) none of the above

Question 14

Check boxes operate as a group, providing a set of mutually exclusive options.

Question 15

A dialog box allows the user to select one of several options from a "drop down" menu.

Question 16

Which of the following components allows the user to enter typed input from the keyboard.

A) check boxes
B) radio buttons
C) sliders
D) combo boxes
E) none of the above

Question 17

A _____________________ container is one that is managed by the underlying operating system on which the program is run, whereas a __________________ container is managed by the Java program itself.

A) heavyweight, lightweight
B) lightweight, heavyweight
C) content pane, applet
D) applet content pane
E) none of the above

Question 18

GUI is an acronym for _______________________.

A) graphical UML interface
B) graphical UML implementation
C) graphical user implementation
D) graphical user interface
E) none of the above

Question 19

The grid layout organizes components into a grid of rows and columns, and also allows components to span more than one cell.

Question 20

Layout managers determine how components are visually presented.

Question 21

Write a short class that represents a panel with a single slider that has values from 0 to 250, with large tick marks in increments of 50 and small tick marks in increments of 10.

Question 22

State the four fundamental ideas of good GUI design.

Question 23

Write a short class that represents a panel with a single radio button that has the option "Yes" and the option "No." By default, the Yes button should be checked.

Question 24

Any Swing component can be assigned a tool tip.

Question 25

Explain the difference between check boxes and radio buttons.

Question 26

The keyHit event is called when a key is pressed.

Question 27

What is the difference between a mnemonic and a tool tip?

Question 28

Give an example of a common use of a dialog box.

Question 29

A color chooser is a dialog box.

Question 30

Describe the difference between a heavyweight container and a lightweight container. Give an example of each.

Question 31

A mnemonic is a short line of text that will appear when the cursor is rested momentarily on top of the component.

Question 32

Explain the difference between a combo box and a dialog box.

Question 33

Write a keyPressed method that behaves as follows. If the user presses the up arrow, the method should output "You pressed up" using the System.out.println method. If the user presses the down arrow, the method should output "You pressed down" using the System.out.println method.

Question 34

The ability of the user should be ignored when designing GUIs. In other words, GUIs should be designed with the most unskilled user in mind.

Question 35

Should a component ever be disabled? Why or why not?

Question 36

Describe the areas of a border layout.

Question 37

Write a short snippet of code that creates a JPanel object called p1, and creates a border around it containing the title "this is a JPanel."

Question 38

Explain the difference between a Grid Layout and a GridBag Layout.

Question 39

Suppose we have created a class called MyGUI, which represents a GUI. Write a program that creates a JFrame object, adds a MyGUI object to the frame and makes it visible.

Question 40

Write a program that produces a simple GUI that has a single button labeled "Push Me."