Question 1

FlowLayout method_________ changes the alignment for the FlowLayout.

Accepted Answer

A)  setLayout 
B)  modifyAlignment 
C)  setAlignment 
D)  setAlign 
A)  setLayout 
B)  modifyAlignment 
C)  setAlignment 
D)  setAlign

Question 2

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 3

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 4

Which of the following statements about adapters is false?

Accepted Answer

A)  An adapter class implements an interface. 
B)  An adapter class provides a default (empty) implementation of every method in the interface. 
C)  Programmers override selected adapter methods. 
D)  A ComponentListener is a ComponentAdaptor. 
A)  An adapter class implements an interface. 
B)  An adapter class provides a default (empty) implementation of every method in the interface. 
C)  Programmers override selected adapter methods. 
D)  A ComponentListener is a ComponentAdaptor.

Question 5

Adding a ButtonGroup object to a container ________.

Accepted Answer

A)  is necessary for the functionality of the ButtonGroup to work properly. 
B)  causes all the JRadioButtons in the group to have their event handlers registered. 
C)  results in a compilation error. 
D)  None of the above. 
A)  is necessary for the functionality of the ButtonGroup to work properly. 
B)  causes all the JRadioButtons in the group to have their event handlers registered. 
C)  results in a compilation error. 
D)  None of the above.

Question 6

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 7

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 8

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 9

Which methods can be used to change the scrollbar policies?

Accepted Answer

A)  setHoizontalPolicy, setVerticalPolicy. 
B)  setHorizontal, setVertical. 
C)  setHPolicy, setVPolicy. 
D)  setHorizontalScrollBarPolicy, setVerticalScrollBarPolicy. 
A)  setHoizontalPolicy, setVerticalPolicy. 
B)  setHorizontal, setVertical. 
C)  setHPolicy, setVPolicy. 
D)  setHorizontalScrollBarPolicy, setVerticalScrollBarPolicy.

Question 10

JPasswordField contains method ______________to obtain the data entered.

Accepted Answer

A)  getInput. 
B)  getPassword. 
C)  getText. 
D)  getEcho. 
A)  getInput. 
B)  getPassword. 
C)  getText. 
D)  getEcho.

Question 11

A MouseHandler object implements which two interfaces?

Accepted Answer

A)  MouseListener and MouseActionListener. 
B)  MouseListener and MouseMotionListener. 
C)  MouseListener and MouseEventListener. 
D)  MouseListener only. 
A)  MouseListener and MouseActionListener. 
B)  MouseListener and MouseMotionListener. 
C)  MouseListener and MouseEventListener. 
D)  MouseListener only.

Question 12

Which of the following choices completes the sentence correctly?
 A(n)_____ is a(n)______ .

Accepted Answer

A)  JToggleButton, JCheckBox 
B)  JToggleButton, JRadioButton 
C)  JButton, JToggleButton 
D)  JButton, AbstractButton 
A)  JToggleButton, JCheckBox 
B)  JToggleButton, JRadioButton 
C)  JButton, JToggleButton 
D)  JButton, AbstractButton

Question 13

The class GridLayout constructs to hold components.

Accepted Answer

A)  a horizontal grid with one row 
B)  a vertical grid with one column 
C)  a grid with multiple rows and columns 
D)  a square grid with the same number of rows as columns 
A)  a horizontal grid with one row 
B)  a vertical grid with one column 
C)  a grid with multiple rows and columns 
D)  a square grid with the same number of rows as columns

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

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 16

By default JScrollPane ________.

Accepted Answer

A)  always displays scrollbars 
B)  never displays scrollbars 
C)  only displays scrollbars if they are needed 
D)  None of the above 
A)  always displays scrollbars 
B)  never displays scrollbars 
C)  only displays scrollbars if they are needed 
D)  None of the above

Question 17

GUI event with which the user interacts is the ________________.

Accepted Answer

A)  event effector. 
B)  event container. 
C)  event raiser. 
D)  event source. 
A)  event effector. 
B)  event container. 
C)  event raiser. 
D)  event source.

Question 18

Which method sets the text that's displayed when the user hovers over a JLabel?

Accepted Answer

A)  setHover 
B)  setHoverText 
C)  setToolTip 
D)  setToolTipText 
A)  setHover 
B)  setHoverText 
C)  setToolTip 
D)  setToolTipText

Question 19

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 20

A user of a one-button mouse can simulate pushing the middle button on a three-button mouse by holding the___________ while clicking the left mouse button.

Accepted Answer

A)  Alt key. 
B)  Meta key. 
C)  Ctrl key. 
D)  Shift key. 
A)  Alt key. 
B)  Meta key. 
C)  Ctrl key. 
D)  Shift key.

Exam 24: Swing Gui Components

FlowLayout method_________ changes the alignment for the FlowLayout.

Class JTextArea's getSelectedText method ________.

A JRadioButton is different from a JCheckBox in that _________.

Which of the following statements about adapters is false?

Adding a ButtonGroup object to a container ________.

Which of the following is false?

Which method determines if a JCheckBox is selected?

All layout managers implement the interface ________.

Which methods can be used to change the scrollbar policies?

JPasswordField contains method ______________to obtain the data entered.

A MouseHandler object implements which two interfaces?

Which of the following choices completes the sentence correctly? A(n)_____ is a(n)______ .

The class GridLayout constructs to hold components.

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

Method getSelectedIndex of class JComboBox returns:

By default JScrollPane ________.

GUI event with which the user interacts is the ________________.

Which method sets the text that's displayed when the user hovers over a JLabel?

A JTextArea ________.

A user of a one-button mouse can simulate pushing the middle button on a three-button mouse by holding the___________ while clicking the left mouse button.

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and Operators

Control Statements: Logical Operators

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Exception Handling: a Deeper Look

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Files, Inputoutput Streams, Nio and Xml Serialization

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Graphics and Java 2d

Networking

Java Persistence Api Jpa

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters

Which of the following choices completes the sentence correctly? A(n)_ is a(n)__ .