Question 1

What type does the method getSelectedItem in the JComboBox class return?

Accepted Answer

A)  Object 
B)  String 
C)  JRadioButton 
D)  JLabel 
A)  Object 
B)  String 
C)  JRadioButton 
D)  JLabel A

Question 2

What method is required by the ChangeListener interface?

Accepted Answer

A)  changeOccured 
B)  actionPerformed 
C)  stateChanged 
D)  sliderMoved 
A)  changeOccured 
B)  actionPerformed 
C)  stateChanged 
D)  sliderMoved C

Question 3

The _______ interface toolkit has a large set of user-interface components.

Accepted Answer

A)  GUI Builder 
B)  graphical user 
C)  Swing 
D)  JMenu 
A)  GUI Builder 
B)  graphical user 
C)  Swing 
D)  JMenu C

Question 4

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

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  {
DoSomething();
}
}
Mi)addActionListener(new MyMenuListener());
Return mi;
} 
A)  1 
B)  2 
C)  3 
D)  4 
E)  {
DoSomething();
}
}
Mi)addActionListener(new MyMenuListener());
Return mi;
}

Question 5

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

Accepted Answer

A)  I, II 
B)  I, II, III 
C)  III, IV and V 
D)  IV an V 
A)  I, II 
B)  I, II, III 
C)  III, IV and V 
D)  IV an V

Question 6

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

Accepted Answer

A)  I, II 
B)  I, II, III 
C)  III, IV and V 
D)  II and III 
A)  I, II 
B)  I, II, III 
C)  III, IV and V 
D)  II and III

Question 7

If the makeMenuItem method is called four times, at most how many different actions can be performed by these four newly created MenuItem objects when the doSomethingElse method is called? public JMenuItem makeMenuItem(String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
Class MyMenuListener implements ActionListener
{
Public void actionPerformed(ActionEvent

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  {
DoSomethingElse(e);
}
}
mi.addActionListener(new MyMenuListener());
Return mi;
} 
A)  1 
B)  2 
C)  3 
D)  4 
E)  {
DoSomethingElse(e);
}
}
mi.addActionListener(new MyMenuListener());
Return mi;
}

Question 8

What is the best way to start using Swing components?

Accepted Answer

A)  Use a few classes with basic properties and methods, then explore API documentation 
B)  Learn all the classes in Swing and their inheritance hierarchies 
C)  Learn all the methods of the JComponent superclass before using any Swing components 
D)  Use a Swing component only after understanding all of its constructors 
A)  Use a few classes with basic properties and methods, then explore API documentation 
B)  Learn all the classes in Swing and their inheritance hierarchies 
C)  Learn all the methods of the JComponent superclass before using any Swing components 
D)  Use a Swing component only after understanding all of its constructors

Question 9

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);

Accepted Answer

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 
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

Question 10

Which of the following adds a border to the following panel? JPanel panel = new JPanel();

Accepted Answer

A)  panel.addEtchedBorder(); 
B)  panel.addBorder(new EtchedBorder()); 
C)  panel.add(new EtchedBorder()); 
D)  panel.setBorder(new EtchedBorder()); 
A)  panel.addEtchedBorder(); 
B)  panel.addBorder(new EtchedBorder()); 
C)  panel.add(new EtchedBorder()); 
D)  panel.setBorder(new EtchedBorder());

Question 11

What can be determined about obj from the code below? JMenuItem menuItem = new JMenuItem("Exit");
MenuItem.addActionListener(obj);

Accepted Answer

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 
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 12

Which layout manager uses a grid, but allows selected grid locations to span multiple rows or columns?
I GridBagLayout
II BorderLayout
III GridLayout

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  I and III 
A)  I 
B)  II 
C)  III 
D)  I and III

Question 13

Which of the following statements is correct?

Accepted Answer

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. 
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 14

Which layout manager allows you to add components in different orders, with the result being the same GUI appearance?
I FlowLayout
II BorderLayout
III GridLayout

Accepted Answer

A)  I 
B)  II 
C)  I and III 
D)  II and III 
A)  I 
B)  II 
C)  I and III 
D)  II and III

Question 15

What type of event does the JSlider class generate?

Accepted Answer

A)  ChangeEvent 
B)  ActionEvent 
C)  ItemEvent 
D)  SliderEvent 
A)  ChangeEvent 
B)  ActionEvent 
C)  ItemEvent 
D)  SliderEvent

Question 16

A(n) ____ is used when you have a large set of choices.

Accepted Answer

A)  combo box 
B)  radio button 
C)  check box 
D)  action event 
A)  combo box 
B)  radio button 
C)  check box 
D)  action event

Question 17

Which method can a program use to set the selected choice in a JRadioButton?

Accepted Answer

A)  set 
B)  setChoice 
C)  setSelectedItem 
D)  setSelected 
A)  set 
B)  setChoice 
C)  setSelectedItem 
D)  setSelected

Question 18

Which of the following classes have a user-editable area?

Accepted Answer

A)  JCheckBox 
B)  JComboBox 
C)  ButtonGroup 
D)  JRadioButton 
A)  JCheckBox 
B)  JComboBox 
C)  ButtonGroup 
D)  JRadioButton

Question 19

Which layout manager constructor call would be best-suited to create a telephone handset GUI which has three rows of three keys each with labels, 1,2,3,4,5,6,7,8,9, and a fourth row with labels *, 0, and #?

Accepted Answer

A)  new GridLayout(3, 4) 
B)  new GridLayout(4, 3) 
C)  new FlowLayout(4, 3) 
D)  new BorderLayout(3, 4) 
A)  new GridLayout(3, 4) 
B)  new GridLayout(4, 3) 
C)  new FlowLayout(4, 3) 
D)  new BorderLayout(3, 4)

Question 20

The statement that would add smallButton to the button group in the following code is _________. JRadioButton smallButton = new JRadioButton("Small");
ButtonGroup group = new ButtonGroup();

Accepted Answer

A)  group.add(new smallButton); 
B)  group.add(smallButton); 
C)  smallButton.add(); 
D)  You cannot add smallButton to the button group. 
A)  group.add(new smallButton); 
B)  group.add(smallButton); 
C)  smallButton.add(); 
D)  You cannot add smallButton to the button group.

Exam 19: Graphical User Interfaces

What type does the method getSelectedItem in the JComboBox class return?

What method is required by the ChangeListener interface?

The _______ interface toolkit has a large set of user-interface components.

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

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

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

What is the best way to start using Swing components?

Which of the following adds a border to the following panel? JPanel panel = new JPanel();

What can be determined about obj from the code below? JMenuItem menuItem = new JMenuItem("Exit"); MenuItem.addActionListener(obj);

Which layout manager uses a grid, but allows selected grid locations to span multiple rows or columns? I GridBagLayout II BorderLayout III GridLayout

Which of the following statements is correct?

Which layout manager allows you to add components in different orders, with the result being the same GUI appearance? I FlowLayout II BorderLayout III GridLayout

What type of event does the JSlider class generate?

A(n) ____ is used when you have a large set of choices.

Which method can a program use to set the selected choice in a JRadioButton?

Which of the following classes have a user-editable area?

Which layout manager constructor call would be best-suited to create a telephone handset GUI which has three rows of three keys each with labels, 1,2,3,4,5,6,7,8,9, and a fourth row with labels *, 0, and #?

The statement that would add smallButton to the button group in the following code is _________. JRadioButton smallButton = new JRadioButton("Small"); ButtonGroup group = new ButtonGroup();

Introduction

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Decisions

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Inputoutput and Exception Handling

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