Deck 13: Advanced Gui Applications

Question 1

What will the following code do when it is executed? JTextArea message = JTextArea(greetings,50,70);
JScrollPane scrollPane = new JScrollPane(message);

A) It will create a JScrollPane object for the JTextArea object referenced by message and display a horizontal scroll bar on the text area.
B) It will create a JScrollPane object for the JTextArea object referenced by message and display a vertical scroll bar on the text area.
C) It will create a JScrollPane object for the JTextArea object referenced by message and display both vertical and horizontal scroll bars on the text area.
D) It will create a JScrollPane object for the JTextArea object referenced by message and display no scroll bars on the text area.

Answer 1

C

Question 2

If the combo box addressBox contains a list of strings,why is the returned value of getSelectedItem method in the following code cast to String? String selectedAddress;
SelectedAddress = (String)addressBox.getSelectedItem();

A) This is not necessary.
B) Because the syntax of the method requires it.
C) It makes the program more readable
D) Because the return type of the method is an Object.

Answer 2

D

Question 3

A mnemonic is

A) A single key on the keyboard that you press to quickly access a component such as a button.
B) A key on the keyboard that you press in combination with the SHIFT key to quickly access a component such as a button.
C) A key on the keyboard that you press in combination with the ALT key to quickly access a component such as a button.
D) A key on the keyboard that you press in combination with the CTRL key to quickly access a component such as a button.

Answer 3

C

Question 4

To determine which item in a list is currently selected use

A) the getSelectedIndex method
B) the getSelectedValue method
C) Both a and b
D) Neither a or b

Question 5

To add a tool tip to a component use

A) the setToolTipText method.
B) the addToolTipText method.
C) the toolTipText method.
D) the appendToolTipText method.

Question 6

To add the JList object addressList to a scroll pane named scrollPane,use the following

A) JScrollPane scrollPane = new JScrollPane(addressList);
B) scrollPane.add(addressList);
C) addressList.add(scrollPane);
D) addressList.addScrollPane(scrollPane);

Question 7

What will display when the following code is executed: JLabel label = new JLabel ("It is a beautiful morning.");
Labed.setIcon(SunnyFace.gif);

A) A label with the text "It is a beautiful day." to the left of the SunnyFace image.
B) A label with the text "It is a beautiful day." to the right of the SunnyFace image.
C) A label with the text "It is a beautiful day." below the SunnyFace image.
D) A label with the text "It is a beautiful day." above the SunnyFace image.

Question 8

What will happen when the following code is executed? JPanel panel = new JPanel();
Color selectedColor;
SelectedColor = JColorChooser.showDialog(null,
"Select color",Color.BLUE);

A) A Color Chooser will be displayed in the upper,left-hand corner of the screen with "Select color" in its Title Bar and blue pre-selected.
B) A Color Chooser will be displayed in the center of the screen with "Select color" in its Title Bar and blue pre-selected.
C) A Color Chooser will be displayed in the center of the screen with "Select color" as the OK button's text and blue pre-selected.
D) A Color Chooser will be displayed in the lower,right-hand corner of the screen with "Select color" in its Title Bar and blue pre-selected.

Question 9

When an item in a Jlist object is selected it generates a(n)

A) action listener event
B) action performed event
C) list selection listener event
D) list selection event

Question 10

The default selection mode for a JList component is

A) single selection
B) single interval selection
C) multiple interval selection
D) There is no default setting.

Question 11

Which of the following is not a class used in constructing a menu system?

A) JMenuItem
B) JCheckBoxMenuItem
C) JButton
D) JRadioButtonMenuItem

Question 12

When an item in the combo box is selected,the combo box executes its action event listener's actionPerformed method,passing

A) an ItemEvent object as an argurment.
B) a SelectionEvent object as an argurment.
C) an ActionEvent object as an argument.
D) the combo box as an argument.

Question 13

A menu system may consist of each of the following,except

A) check box menu item
B) combo box menu item
C) radio button menu item
D) menu item

Question 14

If a user enters a value in the text box of an editable combo box and the value is not in the list,what will the method getSelectedIndex return?

A) The index of the item that the user replaced.
B) The index of the item the user entered.
C) -1
D) 0,since the item is not in the list.

Question 15

The Dimension class is part of the

A) javax.swing.event package
B) java.awt.menu package
C) javax.swing package
D) java.awt package

Question 16

If addressList is a JList component,what will the value of x be after the following statement is executed? x = addressList.getSelectedIndex();

A) The value of the first selected item.
B) The index of the first selected item.
C) An array of objects containing the items selected.
D) An array containing the indices of all the selected items in the list.

Question 17

What will happen when the following statement is executed? x.setEditable(false);

A) The boolean variable x will be set to false.
B) The text field x will be made read-only.
C) The text field x will be editable.
D) The boolean variable x will be editable.

Question 18

To force the JFrame that encloses a window to resize itself automatically when a larger object is placed in the frame,use

A) the pack method.
B) the resize method.
C) the grow method.
D) the enlarge method.

Question 19

What will be the results of executing the following statements? x.setEditable(true);
X)setText("Tiny Tim");

A) The text field x will have the value "Tiny Tim" and be read only.
B) The text field x will have the value "Tiny Tim" and the user will be able to change its value.
C) The text field x will have the value true.
D) The text field x have the value "trueTiny Tim"

Question 20

The default directory for the JFileChooser constructor is

A) Your login directory if you are using UNIX
B) Probably My Documents if you are using Windows
C) Neither a nor b
D) Both a and b

Question 21

What will display when the following code is executed: JButton button =
New JButton ("It is a beautiful day.");
Button.setIcon(SunnyFace.gif);

A) A button with the text "It is a beautiful day." to the left of the SunnyFace image.
B) A button with the text "It is a beautiful day." to the right of the SunnyFace image.
C) A button with the text "It is a beautiful day." below the SunnyFace image.
D) A button with the text "It is a beautiful day." above the SunnyFace image.

Question 22

When creating images,the argument passed to the image parameter in the JLabel constructor can be an ImageIcon object,or any object that implements the Icon interface.

Question 23

The ImageIcon class constructor accepts

A) an integer that references the image.
B) a String argument which is the name of the image file.
C) a String argument which is the name of the image.
D) it does not accept any arguments.

Question 24

Which of the following is not a class used in constructing a menu system?

A) JMenuItem
B) JCheckBoxMenuItem
C) JComboBoxMenuItem
D) JRadioButtonMenuItem

Question 25

If nameList is a JList component,use the following statement to display 4 rows in nameList.

A) nameList.setRowCount(4);
B) nameList.setDisplayRowCount(4);
C) nameList.setShowRowCount(4);
D) nameList.setVisibleRowCount(4);

Question 26

Which of the following statements creates a horizontal slider component with a minimum value of 0,a maximum value of 50,and an initial value of 25?

A) JSlider slider =
New JSlider(0,50,25,JSlider.HORIZONTAL);
B) JSlider slider =
New JSlider(JSlider.HORIZONTAL,0,50,25);
C) JSlider slider =
New JSlider(JSlider.HORIZONTAL,25,0,50);
D) JSlider slider =
New JSlider(JSlider.HORIZONTAL,50,0,25);

Question 27

Which of the following assigns ALT+C as a mnemonic key for the JButton object,clearButton?

A) clearButton.addMnemonic(KeyEvent.VK_C);
B) clearButton.setMnemonic(KeyEvent.C);
C) clearButton.setMnemonic(KeyEvent.VK_C);
D) clearButton.assignMnemonic(KeyEvent.VK_C);

Question 28

When you create an instance of the JList class,

A) you pass an array of objects to the constructor.
B) the list has a default selection mode of Single Selection Mode.
C) the values in the list are automatically sorted.
D) you must indicate the maximum number of list items the user may select at any one time.

Question 29

What will be the results of executing the following code,if the user simply clicks OK? JPanel panel = new JPanel();
Color selectedColor;
SelectedColor = JColorChooser.showDialog(null,
"Select color",Color.blue);
Panel.setForeground(selectedColor);

A) The foreground color will remain unchanged.
B) The foreground color will be set to white.
C) The foreground color will be set to black.
D) The foreground color will be set to blue.

Question 30

If the argument passed to the showOpenDialog method is null,

A) the dialog box will normally be displayed in the upper,left-hand corner of the screen.
B) the dialog box will normally be centered in the screen.
C) nothing will be displayed because there was nothing passed to the method.
D) -1 will be returned from the method.

Question 31

By default the scroll bars are always displayed in a JList component.

Question 32

If a user enters a value in the text box of an editable combo box and the value is not in the list,what will the method getSelectedItem return?

A) The value that the user replaced
B) The index of the item the user entered
C) The value that appears in the text field,even if it is not in the combo box's list
D) Nothing,since the item is not in the list

Question 33

The following statement textList.setSelectionMode(
ListSelectModel.SINGLE_INTERVAL_SELECTION);

A) sets the textList component to single selection mode.
B) sets the textList component to ListSelectModel.
C) sets the textList component to single interval selection mode.
D) sets the value of textList to SINGLE_INTERVAL_SELECTION.

Question 34

A tool tip is

A) a guide provided by the Help menu as to which tool to use for various programming techniques.
B) another name for the Tool Bar.
C) used to make programming easier.
D) text that is displayed in a small box when the user holds the mouse cursor over a component.

Question 35

What does the following statement do? JTextArea textField = JTextArea(message,25,15);

A) It creates a text area with 25 columns and 15 rows that will initially display the text stored in the String object message.
B) It creates a text area with 25 columns and 15 rows that will initially display the text stored in the text area textField.
C) It creates a text area with 25 rows and 15 columns that will initially display the text stored in the String object message.
D) It creates a text area with 25 rows and 15 columns that will initially display the text "message".

Question 36

What will display when the following code is executed? imagePanel = new JPanel();
ImageLabel = new JLabel();
ImagePanel.Add(imageLabel);
ImageIcon sunnyFaceImage =
New ImageIcon("SunnyFace.gif");
ImageLabel.setIcon(sunnyFaceImage);
Pack();

A) The JFrame that encloses the window will resize itself to accommodate the SunnyFace image.
B) imagePanel will resize itself to accommodate the SunnyFace image.
C) The SunnyFace image will resize itself to fit on imageLabel.
D) The SunnyFace image will resize itself to fit on imagePanel.

Question 37

The JMenuBar method is a(n)

A) JFrame method
B) JPanel method
C) JMenu method
D) JTextComponent method

Question 38

A menu system may consist of each of the following except

A) menu item
B) separator bar
C) menu bar
D) It may have all the above.

Question 39

If addressList exists and has values stored in it and addrList is an array with values stored in it,what will be the results when the following code is executed? addressList.setListData(addrList);

A) The values of addrList will be attached at the end of the current addressList.
B) The values in addressList will be replaced by the values in addrList.
C) The values of addrList will be inserted at the beginning of the current addressList.
D) addressList will be unchanged.

Question 40

The JComboBox class is in the

A) javax.swing package
B) java.awt package
C) java awt.event package
D) java.swing.event package

Question 41

A label's preferred size is determined only by calling the setPreferredSize method.

Question 42

When you write a change listener class method for a slider,it must implement the ChangeListener interface which is in the javax.swing.event package.

Question 43

When a JList component is added to a JScrollPane object,a border will automatically appear around the list.

Question 44

You can create a label with an image,or with both an image and text.

Question 45

When using a slider,by default,tick marks are not displayed,and setting their spacing does not cause them to be displayed.

Question 46

In the following code the setPreferredSize method sets the size of the text,"Have a good day".
label = new Jlabel("Have a good day",SwingConstants.CENTER);
label.setPreferredSize(new Dimension(400,200));