Deck 20: Graphical User Interfaces

Question 1

In Java, each container has its own ____________________, which determines how the components are laid out.
A.container
B.layout manager
C.Swing component
D.frame manager

Answer 1

layout manager

Question 2

If a JPanel with a BorderLayout manager contains a single component that was added to the CENTER, which parts of the JPanel does the component fill?
I North
II South
III Center
IV West
V East
A.I, II and III
B.II, IV and V
C.III, IV and V
D.I, II, III, IV and V

Answer 2

I, II, III, IV and V

Question 3

To create a _____ layout, you supply the number of rows and columns in the constructor, then add the components, row by row, left to right.
A.border
B.grid
C.grid bag
D.boxed

Answer 3

grid

Question 4

A complex GUI can be created with a set of nested panels.What should determine the components that go into a single panel?
A.the type of components
B.the size of the components
C.the adjacency of the components
D.the names of the components

Question 5

What is the default layout manager of JPanel?
A.FlowLayout
B.GridLayout
C.BoxLayout
D.GridBagLayout

Question 6

Which layout manager uses a grid, but allows selected grid locations to span multiple rows or columns?
I GridBagLayout
II BorderLayout
III GridLayout
A.Only I
B.Only II
C.Only III
D.I and III

Question 7

Which layout manager places objects left-to-right, row by row into a fixed set of rows and columns?
A.FlowLayout
B.BorderLayout
C.BoxLayout
D.GridLayout

Question 8

Which layout manager constructor call would be best-suited to create a telephone keypad GUI which has three rows of three keys that are labeled 1,2,3; 4,5,6; and 7,8,9; respectively, as well as a fourth row of three keys labeled *, 0, #?
A.new GridLayout(3, 4)
B.new GridLayout(4, 3)
C.new FlowLayout(4, 3)
D.new BorderLayout(3, 4)

Question 9

What is the default layout manager of the content pane of a JFrame?
A.FlowLayout
B.GridLayout
C.BoxLayout
D.BorderLayout

Question 10

What is the easiest way to create complex-looking GUI layouts?
I use the GridBagLayout manager
II nest panels, each with its own layout manager
III use multiple layout managers in the same container
A.Only I
B.Only II
C.Only III
D.I and III

Question 11

Suppose a JPanel with a BorderLayout manager contains two components: component1, which was added to the CENTER, and component2, which was added to the SOUTH.Which parts of the JPanel will appear?
I North
II South
III Center
IV West
V East
A.I and II
B.I, II, and III
C.III, IV, and V
D.II and III

Question 12

How do you add two buttons to the south area of a frame using the BorderLayout?
A.Add them to a panel, then add the panel to the SOUTH
B.Add one to the SOUTH, then add the second one to the SOUTH
C.Add one to the SOUTH, then add the second one to the CENTER
D.Add one to the CENTER, then add the second one to the SOUTH

Question 13

Which layout manager uses a grid so that each component will always be placed into an area of the same size?
I GridBagLayout
II BorderLayout
III GridLayout
A.Only I
B.Only II
C.Only III
D.I and III

Question 14

When adding a component to a container with the ____ layout, specify the NORTH, EAST, SOUTH, WEST, or CENTER position.
A.border
B.grid
C.grid bag
D.flow

Question 15

What is the best first step in picking the layout managers for a set of nested panels?
A.use a single panel with a GridBagLayout manager
B.construct a set of JPanel objects
C.make a sketch of the layout
D.use multiple panels with FlowLayout managers

Question 16

Which layout manger would be best suited to create a simple navigation GUI with directional arrows for left, right, up, down and enter?
A.GridLayout
B.BorderLayout
C.FlowLayout
D.GridBagLayout

Question 17

Which layout manager places objects left-to-right, and creates a new row only if when the current row cannot accommodate another object?
A.FlowLayout
B.BorderLayout
C.BoxLayout
D.GridLayout

Question 18

Which layout manager allows you to add components to it by invoking the container's add method with the component as the only argument to add.
I FlowLayout
II BorderLayout
III GridLayout
A.Only I
B.Only II
C.Only III
D.I and III

Question 19

The JFrame has a content pane with a default BorderLayout manager.Which method allows changing it to a FlowLayout manager?
A.setLayout
B.setFlowLayout
C.assignLayout
D.changeLayout

Question 20

Which class has constants called NORTH and SOUTH?
A.FlowLayout
B.BorderLayout
C.BoxLayout
D.GridLayout

Question 21

Which of the following is false about achieving complex layouts?
A.By giving each panel an appropriate layout manager, the panels can be nested
B.There are more complex layout managers such as the grid bag layout and group layout
C.You can use as many panels as you need to organize your components
D.The order of the nested panel does not matter

Question 22

Suppose a JPanel with a BorderLayout manager contains two components: component1, which was added to the EAST, and component2, which was added to the WEST.Which parts of the JPanel appear?
I North
II South
III Center
IV West
V East
A.I and II
B.I, II, and III
C.III, IV, and V
D.IV and V

Question 23

Which of the following classes have a user-editable area?
A.JCheckBox
B.JComboBox
C.ButtonGroup
D.JRadioButton

Question 24

Which GUI element allows text entry from the program user?
A.ButtonGroup
B.JComboBox
C.JSlider
D.JPanel

Question 25

Which of the following is true about a border layout?
A.It groups components into three areas: center, north, and south
B.It is the default manager for JPanel
C.Each area can hold a single component, or it can be empty
D.Components do not expand to fill in the space of the border layout

Question 26

Which method can a program use to set the selected choice in a JComboBox?
A.select
B.setChoice
C.setSelectedItem
D.The selection can only be set through the GUI by the user.

Question 27

Which of the following methods returns the object that was selected in the JComboBox?
A.getSelected
B.getItem
C.getChoice
D.getSelectedItem

Question 28

When using a combo box, the _______ displays the name of the current selection.
A.text field
B.text area
C.menu item
D.submenu item

Question 29

Which of the following GUI objects generate(s) action events?
I JComboBox
II JRadioButton
III JButton
A.Only I
B.I and II
C.I and III
D.I, II and III

Question 30

Insert the missing code in the following segment.The code intends to get the newly selected item from the combo box.
JComboBox facenameCombo = new JComboBox();
String selectedString = __________________________;
A.(String) facenameCombo.getSelected();
B.(String) facenameCombo.getSelectedItem();
C.(String) selectedString.getSelected();
D.(String) selectedString.getSelectedItem();

Question 31

A ________ is a user-interface component with two states: checked and unchecked.
A.radio button
B.check box
C.menu item
D.submenu item

Question 32

The statement that would add smallButton to the button group in the following code is _________.
JRadioButton smallButton = new JRadioButton("Small");
ButtonGroup group = new ButtonGroup();
A.group.add(new smallButton);
B.group.add(smallButton);
C.smallButton.add();
D.You cannot add smallButton to the button group.

Question 33

In an online job application, applicants have to submit a cover letter by typing it into a given text box.Which java class would be most appropriate for this text box?
A.JTextArea
B.JTextField
C.JLabel
D.JTextComponent

Question 34

Which of the following classes has a Boolean state that can be set or unset through the GUI?
A.JCheckBox
B.JButton
C.ButtonGroup
D.JMenuItem

Question 35

Which of the following is not a visual component?
A.JRadioButton
B.JButton
C.ButtonGroup
D.JCheckBox

Question 36

A(n) ____ is used when you have a large set of choices.
A.combo box
B.radio button
C.check box
D.action event

Question 37

A ____ is a combination of a list and a text field.
A.radio button
B.combo box
C.check box
D.scroll bar

Question 38

What type of object can be added into a JComboBox by the addItem method?
A.Object
B.String
C.JRadioButton
D.any non-primitive type

Question 39

What type does the method getSelectedItem in the JComboBox classreturn?
A.Object
B.String
C.JRadioButton
D.JLabel

Question 40

Which method can a program use to set the selected choice in a JRadioButton?
A.set
B.setChoice
C.setSelectedItem
D.setSelected

Question 41

What is known for certain from this correct code excerpt?
ActionListener openListener = new FileOpenListener();
JMenuItem fileOpen = new JMenuItem("Open File");
fileOpen.addActionListener(openListener);
A.fileOpen will open a file dialog when clicked
B.The fileOpen menu item will be visible
C.The FileOpenListener class implements the ActionListener interface
D.The openListener object will only listen to the fileOpen object
Title
What is known for certain from this correct code excerpt?
type
mc

Question 42

What is wrong with the following code?
class ExitListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
System.exit(0);
}
}
ActionListener exitListener = new ExitListener();
JMenu exitMenu = new JMenu("Exit");
exitMenu.addActionListener(exitListener);
JMenuBar menuBar = new JMenuBar();
menuBar.add(exitMenu);
A.The ExitListener class is not public
B.You cannot attach a listener to a menu, only to a menu item
C.You cannot add a menu to the menu bar, only a menu item
D.You need to use a menu listener, not an action listener
Title
What is wrong with the following menu code?
type
mc

Question 43

What features do GUI builders have to speed the development of the graphical user interface of the program?
I setting properties of dialog boxes
II automated event-handling code generation
III drag and drop of visual components
A.I
B.II
C.II and III
D.I, II and III

Question 44

If the method makeMenuItem is called four times, how many MyMenuListener objects will be created?
public JMenuItem makeMenuItem(String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomething();
}
}
mi.addActionListener(new MyMenuListener());
return mi;
}
A.1
B.2
C.3
D.4

Question 45

Which elements of creating a graphical user interface are made easier by a GUI builder?
I creating event handlers
II configuring component properties
III adding components
A.Only II
B.I and II
C.I and III
D.I, II, and III

Question 46

You can add a(n) _________ to a panel to make it visible.
A.component
B.JFrame
C.border
D.another panel
Title
You can add a ____ to a panel to make it visible.
type
mc

Question 47

Which of the following generate action events?
A.Buttons
B.Menu items
C.Combo box
D.All of the above

Question 48

What is the most time-effective way to build a GUI quickly and concentrate on coding the logic of the program?
A.use the GridBagLayout manager
B.use a GUI builder, such as NetBeans
C.use nested panels
D.use menus

Question 49

If the makeMenuItem method is called four times, at most how many

Question 50

Which component can be added to a menu?
I JMenuBar
II JMenu
III JMenuItem
A.Only I
B.I and II
C.II and III
D.I, II and III

Question 51

Which of the following would be an appropriate use of radio buttons when ordering a pizza?
A.Topping choices
B.Customer's name
C.Pick-up/Delivery
D.Types of sides

Question 52

What can be determined about obj from the code below?
JMenuItem menuItem = new JMenuItem("Exit");
menuItem.addActionListener(obj);
A.The class of obj implements ActionListener
B.menuItem implements ActionListener
C.obj is of type MenuListener
D.obj is an object of an inner class

Question 53

Based on the statement below, which of the following adds a title to the border?
JPanel panel = new JPanel();
A.panel.setBorder(new TitledBorder());
B.panel.setBorder(new TitledBorder(new EtchedBorder(), "Size"));
C.panel.setBorder(new TitledBorder(new EtchedBorder()));
D.panel.setTitle("Size");
Title
Which of the following adds a title to the border?
type
mc

Question 54

Which of the following defines the job of a ButtonGroup?
A.Places the buttons close to each other in the container
B.Assures only one button in the group is selected at a time
C.Arranges the group of buttons solely for presentation purposes
D.Groups checkboxes together to allow multiple choices

Question 55

Which of the following adds a border to the following panel?
JPanel panel = new JPanel();
A.panel.addEtchedBorder();
B.panel.addBorder(new EtchedBorder());
C.panel.add(new EtchedBorder());
D.panel.setBorder(new EtchedBorder());
Title
Which statement adds a border to this panel?
type
mc

Question 56

When a menu item is selected, what type of event does it send?
A.ActionEvent
B.ChangeEvent
C.ItemEvent
D.SelectionEvent
Title
When a menu item is selected, what type of event does it send?
type
mc

Question 57

When the user selects a menu item, the menu item sends a(n) ___________________.
A.ActionEvent
B.ChangeEvent
C.ItemEvent
D.MouseEvent

Question 58

Examine the code below.What type of class is MyMenuListener?
public JMenuItem makeMenuItem(String menuLabel)
{
JMenuItem mini = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomething();
}
}
mini.addActionListener(new MyMenuListener());
return mi;
}
A.It is an anonymous class
B.It is an inner class
C.It is a JMenuItem subclass
D.It is a JMenu class

Question 59

Given four JRadioButton objects in a ButtonGroup, how many radio buttons can be selected at the same time?
A.1
B.2
C.4
D.3

Question 60

What is the container for top-level menu items?
A.menu bar
B.menu item
C.menu GUI
D.top level menus don't use containers

Question 61

For a new programmer using the Swing JSlider component for the first time, which of these is the least important thing to know?
A.A basic way to construct a JSlider
B.What type of events it generates
C.How to write the BoundedRangeModel constructor
D.Its value when an event occurs

Question 62

What is the general order of a pull-down menu (from top-level going downwards)?
A.Frame, menu bar, menus, submenus, menu items
B.Menus, menu bar, submenus, frame, menu items
C.Menu bar, frame, menus, submenus, menu items
D.Submenus, menus, frame, menu bar, menu items

Question 63

Which code will create a JSlider with a range from 0 to 100, with an initial value of 50?
I new JSlider()
II new JSlider(0, 100, 50)
III new JSlider(50, 0, 100)
A.Only I
B.Only II
C.Only III
D.I and II

Question 64

What code would be the most appropriate assist in getting notified when a user interacts with a JSlider?
A.public JSlider(BoundedRangeModel brm)
B.public void addChangeListener(ChangeListener l)
C.JSlider()
D.public JSlider(int min, int max, int value)

Question 65

What method is required by the ChangeListener interface?
A.changeOccured
B.actionPerformed
C.stateChanged
D.sliderMoved

Question 66

What type of event does the JSlider class generate?
A.ChangeEvent
B.ActionEvent
C.ItemEvent
D.SliderEvent

Question 67

Consider the scope of the three objects menuLabel, mi, and the anonymous object new MyMenuListener() within the JmenuItem class.How do thier lifetimes compare?
public JMenuItem makeMenuItem(final String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomethingElse();
System.out.println(menuLabel);
}
}
mi.addActionListener(new MyMenuListener());
return mi;
}
A.all have the same lifetimes
B.menuLabel and new MyMenuListener() are the same and both longer than mi
C.mi and new MyMenuListener() are the same and both longer than menuLabel
D.from shortest to longest:menuLabel, new MyMenuListener(), mi

Question 68

The ChangeEvent class defines no methods.What makes it possible to call the getSource method on a ChangeEvent object?
A.The method is inherited from the Object class.
B.You have to code that method yourself.
C.The method is inherited from the EventObject class.
D.ChangeEvent implements the Event interface

Question 69

The code below will not compile successfully unless the argument to the makeMenuItem method is final.Why not?
public JMenuItem makeMenuItem(final String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomethingElse();
System.out.println(menuLabel);
}
}
mi.addActionListener(new MyMenuListener());
return mi;
}
A.JMenuItem labels must be final
B.This prevents the menuLabel argument from being modified
C.Because a local variable is being accessed from an inner classes
D.Because the String class is final

Question 70

The event that is generated by a slider when its value changes is of type _____.
A.ActionEvent
B.ChangeEvent
C.ItemEvent
D.MouseEvent

Question 71

What can you add action listeners to?
A.Menu items
B.Menus
C.Menu bar
D.Submenu

Question 72

Which of the following statements is correct?
A.new JSlider() creates a horizontal slider with the range 0 to 200 and an initial value of 100.
B.new JSlider() creates a horizontal slider with the range 0 to 10 and an initial value of 5.
C.new JSlider() creates a horizontal slider with the range 0 to 100 and an initial value of 50.
D.new JSlider() creates a horizontal slider with the range 0 to 150 and an initial value of 100.

Question 73

When method makeMenuItem is called, how many objects are being created?
public JMenuItem makeMenuItem(final String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomethingElse();
System.out.println(menuLabel);
}
}
mi.addActionListener(new MyMenuListener());
return mi;
}
A.1
B.2
C.3
D.4

Question 74

If one ChangeListener is listening for three

Question 75

The _______ interface toolkit has a large set of user-interface components.
A.GUI Builder
B.graphical user
C.Swing
D.JMenu