Question 1

Which of the following statements makes the text in a JTextField uneditable?

Accepted Answer

A)  textField.setEditable(true); 
B)  textField.setEditable(false); 
C)  textField.setUneditable(true); 
D)  textField.setUneditable(false); 
A)  textField.setEditable(true); 
B)  textField.setEditable(false); 
C)  textField.setUneditable(true); 
D)  textField.setUneditable(false);

Question 2

Together, the appearance and the way in which the user interacts with the application are known as that application's ________.

Accepted Answer

A)  abstract window toolkit. 
B)  look-and-feel. 
C)  swing factor. 
D)  All of the above. 
A)  abstract window toolkit. 
B)  look-and-feel. 
C)  swing factor. 
D)  All of the above.

Question 3

Which method determines if a JCheckBox is selected?

Accepted Answer

A)  isSelected 
B)  getSelected 
C)  selected 
D)  None of the above 
A)  isSelected 
B)  getSelected 
C)  selected 
D)  None of the above

Question 4

All layout managers implement the interface ________.

Accepted Answer

A)  LayoutInterface 
B)  InterfaceLayoutManager 
C)  LayoutManagerInterface 
D)  LayoutManager 
A)  LayoutInterface 
B)  InterfaceLayoutManager 
C)  LayoutManagerInterface 
D)  LayoutManager

Question 5

A JTextArea ________.

Accepted Answer

A)  provides a bounding box used for the layout of JTextFields 
B)  wraps lines by default 
C)  provides an area for manipulating multiple lines of text 
D)  provides scrollbars for JTextFields 
A)  provides a bounding box used for the layout of JTextFields 
B)  wraps lines by default 
C)  provides an area for manipulating multiple lines of text 
D)  provides scrollbars for JTextFields

Question 6

Which methods retrieve and set the image that's displayed in a JLabel?

Accepted Answer

A)  getIcon, setIcon. 
B)  getResource, setResource. 
C)  getText, setText. 
D)  getImageIcon, setImageIcon. 
A)  getIcon, setIcon. 
B)  getResource, setResource. 
C)  getText, setText. 
D)  getImageIcon, setImageIcon.

Question 7

Class Point represents ________.

Accepted Answer

A)  a filled oval 
B)  an x-y coordinate pair 
C)  an object used to draw 
D)  a period in a sentence 
A)  a filled oval 
B)  an x-y coordinate pair 
C)  an object used to draw 
D)  a period in a sentence

Question 8

A JRadioButton is different from a JCheckBox in that .

Accepted Answer

A)  a JRadioButton is a subclass of JToggleButton, JCheckBox is not. 
B)  normally several JRadioButtons are grouped together and are mutually exclusive. 
C)  a JRadioButton is a type of button, JCheckBox is not. 
D)  a JRadioButton is a state button, JCheckBox is not. 
A)  a JRadioButton is a subclass of JToggleButton, JCheckBox is not. 
B)  normally several JRadioButtons are grouped together and are mutually exclusive. 
C)  a JRadioButton is a type of button, JCheckBox is not. 
D)  a JRadioButton is a state button, JCheckBox is not.

Question 9

The setMaximumRowCount method is used for:

Accepted Answer

A)  Button. 
B)  JComboBox. 
C)  JRadioButton. 
D)  JToggleButton. 
A)  Button. 
B)  JComboBox. 
C)  JRadioButton. 
D)  JToggleButton.

Question 10

Method getSelectedIndex of class JComboBox returns:

Accepted Answer

A)  the index of the selected item in the JComboBox. 
B)  the selected item in the JComboBox, as a String. 
C)  the index of the previously selected item. 
D)  None of the above. 
A)  the index of the selected item in the JComboBox. 
B)  the selected item in the JComboBox, as a String. 
C)  the index of the previously selected item. 
D)  None of the above.

Question 11

Which of the following is false?

Accepted Answer

A)  A JPasswordField shows that characters are being entered, but hides the actual character with an echo character. 
B)  Class JTextField extends JTextComponent; Class JPasswordField extends JTextField. 
C)  Both JTextFields and JPasswordFields are single-line areas in which the user can enter text via the keyboard. 
D)  JPasswordFields generate events; JTextFields do not. 
A)  A JPasswordField shows that characters are being entered, but hides the actual character with an echo character. 
B)  Class JTextField extends JTextComponent; Class JPasswordField extends JTextField. 
C)  Both JTextFields and JPasswordFields are single-line areas in which the user can enter text via the keyboard. 
D)  JPasswordFields generate events; JTextFields do not.

Question 12

Which of the following is the method used to display a dialog box to gather input?

Accepted Answer

A)  showMessageDialog. 
B)  getInput. 
C)  inputDialog. 
D)  showInputDialog. 
A)  showMessageDialog. 
B)  getInput. 
C)  inputDialog. 
D)  showInputDialog.

Question 13

The JOptionPane constant used to display an icon prompting the user for input is:

Accepted Answer

A)  JOptionPane.ERROR_MESSAGE. 
B)  JOptionPane.INFORMATION_MESSAGE. 
C)  JOptionPane.QUESTION_MESSAGE. 
D)  JOptionPane.WARNING_MESSAGE. 
A)  JOptionPane.ERROR_MESSAGE. 
B)  JOptionPane.INFORMATION_MESSAGE. 
C)  JOptionPane.QUESTION_MESSAGE. 
D)  JOptionPane.WARNING_MESSAGE.

Question 14

How many event-listener interfaces correspond to each event type?

Accepted Answer

A)  one. 
B)  two. 
C)  one or more. 
D)  zero. 
A)  one. 
B)  two. 
C)  one or more. 
D)  zero.

Question 15

Some common lightweight component features supported by JComponent include:

Accepted Answer

A)  support for user-interface localization. 
B)  shortcut keys. 
C)  tool tips. 
D)  All of the above. 
A)  support for user-interface localization. 
B)  shortcut keys. 
C)  tool tips. 
D)  All of the above.

Question 16

When a component is , paintComponent clears the component's background before the component is displayed.

Accepted Answer

A)  transparent 
B)  opaque 
C)  oblique 
D)  concave 
A)  transparent 
B)  opaque 
C)  oblique 
D)  concave

Question 17

Class JTextArea's getSelectedText method ________.

Accepted Answer

A)  returns the text in the JTextArea 
B)  returns the selected text in the JTextArea 
C)  displays only the selected text in the JTextArea 
D)  sets the selected text in the JTextArea 
A)  returns the text in the JTextArea 
B)  returns the selected text in the JTextArea 
C)  displays only the selected text in the JTextArea 
D)  sets the selected text in the JTextArea

Question 18

Which of the following expressions creates a JLabel that displays the text "Here is what I look like!" The JLabel should display Icon object face, and the JLabel's contents should be left aligned.

Accepted Answer

A)  new JLabel("Here is what I look like!", face, SwingConstants.LEFT) 
B)  new JLabel("Here is what I look like!", face, SwingJustification.LEFT) 
C)  new JLabel("Here is what I look like!", SwingConstants.LEFT, face) 
D)  new JLabel("Here is what I look like!", SwingJustification.LEFT, face) 
A)  new JLabel("Here is what I look like!", face, SwingConstants.LEFT) 
B)  new JLabel("Here is what I look like!", face, SwingJustification.LEFT) 
C)  new JLabel("Here is what I look like!", SwingConstants.LEFT, face) 
D)  new JLabel("Here is what I look like!", SwingJustification.LEFT, face)

Question 19

Each container can have ________.

Accepted Answer

A)  only one layout manager 
B)  one or more layout managers 
C)  zero or more layout managers 
D)  only one or two layout managers 
A)  only one layout manager 
B)  one or more layout managers 
C)  zero or more layout managers 
D)  only one or two layout managers

Question 20

Selecting a JList item generates ________.

Accepted Answer

A)  an ActionEvent 
B)  a ListItemEvent 
C)  a ListSelectionEvent 
D)  a ListSelectionItemEvent 
A)  an ActionEvent 
B)  a ListItemEvent 
C)  a ListSelectionEvent 
D)  a ListSelectionItemEvent

Exam 12: Gui Components

Which of the following statements makes the text in a JTextField uneditable?

Together, the appearance and the way in which the user interacts with the application are known as that application's ________.

Which method determines if a JCheckBox is selected?

All layout managers implement the interface ________.

A JTextArea ________.

Which methods retrieve and set the image that's displayed in a JLabel?

Class Point represents ________.

A JRadioButton is different from a JCheckBox in that .

The setMaximumRowCount method is used for:

Method getSelectedIndex of class JComboBox returns:

Which of the following is false?

Which of the following is the method used to display a dialog box to gather input?

The JOptionPane constant used to display an icon prompting the user for input is:

How many event-listener interfaces correspond to each event type?

Some common lightweight component features supported by JComponent include:

When a component is , paintComponent clears the component's background before the component is displayed.

Class JTextArea's getSelectedText method ________.

Which of the following expressions creates a JLabel that displays the text "Here is what I look like!" The JLabel should display Icon object face, and the JLabel's contents should be left aligned.

Each container can have ________.

Selecting a JList item generates ________.

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Introduction to Classes and Objects

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters