Deck 12: Advanced Guis and Graphics

Question 1

The R in RGB stands for Right.

Answer 1

False

Question 2

You can create an applet by extending the class JFrame.

Answer 2

False

Question 3

Unlike application programs, when you compile a Java applet, no .class file is produced.

Answer 3

False

Question 4

The class Container is the superclass of all the classes designed to provide a GUI.

Question 5

You must import the package javax.swing in order to use the methods in the class Font.

Question 6

You can use the methods Background and Foreground to set the background and foreground colors of a component.

Question 7

Applets use the init method in place of constructors to initialize various GUI components and data members.

Question 8

Applets do not have titles.

Question 9

The paint method is used to get data from the user.

Question 10

The class Graphics provides methods for drawing items such as lines, ovals, and rectangles on the screen.

Question 11

An applet invokes the methods start, init, stop, paint, and destroy in sequence.

Question 12

The class JComponent is part of the package javax.swing.

Question 13

You can create instances of Color by mixing red, green, and blue hues in various proportions.

Question 14

JCheckBox is a subclass of the abstract class ToggleButton.

Question 15

JTextAreas can be used to display multiple lines of text.

Question 16

Like Java application programs, Java applets have the method main.

Question 17

A Java applet is the same as a Java GUI application program.

Question 18

You can close an applet by closing the HTML document in which the applet is embedded.

Question 19

The class Graphics is an abstract class.

Question 20

You cannot convert a GUI application into an applet.

Question 21

How many inches is 12-point font?

A) 1/6
C) 6
B) 1
D) 72

Question 22

Does an applet compile like any other Java application program?

A) No -- applets do not produce a .class file because they don't have a main method.
B) Yes -- except the Web browser compiles the applet code.
C) Yes -- it is compiled as an application program and produces a .class file.
D) No -- applets are .applet files and not .java files.

Question 23

Which of the following methods does the class JTextArea inherit from the class JTextComponent?

A) setLineWrap()
C) setColumns()
B) setTabsize()
D) setText()

Question 24

Given Graphics object graph, which statement can you use to change the pen color to red?

A) graph.setColor(Color.red);
B) graph.setPen(Color.red);
C) setForeground(red);
D) graph.getRed();

Question 25

If graph holds a Graphics object, which of the following puts "CAT" starting at X = 20, Y = 50?

A) drawString("CAT", 20, 50);
B) graph.drawString(20, 50, "CAT");
C) graph.println("CAT");
D) graph.drawString("CAT", 20, 50);

Question 26

Which applet method is called by the Web browser to display the applet to the screen?

A) drawApplet()
C) paintApplet()
B) paint()
D) setApplet()

Question 27

What class must be extended when you create an applet?

A) AWT
C) JApplet
B) JDK
D) Graphics

Question 28

Which of the following sets the background color of the applet to white?

A) setAppletColor(white);
B) setBackground(white);
C) setBackground(Color.white);
D) setAppletColor(white);

Question 29

What HTML tags begin and end a Web page?

A)
C)
B)
D)

Question 30

A JComboBox generates an ItemEvent.

Question 31

Which of the following constructors would produce the color white?

A) Color whiteColor = new Color(0, 0, 0);
B) Color whiteColor = new Color(255, 0, 0);
C) Color whiteColor = new Color(255, 255, 0);
D) Color whiteColor = new Color(255, 255, 255);

Question 32

The layout manager FlowLayout places components in the container from left to right and centered, by default, until no more items can be placed.

Question 33

To draw a rectangle filled with the current color, you can use the method ____.

A) drawRect()
C) drawOval()
B) fillRect()
D) fillOval()

Question 34

Clicking on a JCheckBox generates an item event.

Question 35

Given Graphics object graph, which of the following draws a circle with a radius of 50, at X = 20, Y = 30?

A) graph.drawCircle(50);
B) graph.drawCircle(50, 50, 20, 30);
C) graph.drawOval(50, 50);
D) graph.drawOval(20, 30, 50, 50);

Question 36

JRadioButtons are useful when you want to give the user the ability to select more than one of the presented options.

Question 37

Item events are handled by the interface ItemListener, which contains only the abstract method itemStateChanged.

Question 38

Which of the options in the accompanying figure is a correct Web page for the applet WelcomeHomeApplet?

A) A
C) C
B) B
D) D

Question 39

What class can be used to generate a random number?

A) JApplet
C) Math
B) Graphics
D) RandomNumber

Question 40

Applets are embedded in ____ documents.

A) HTTP
C) HTML
B) TCP
D) VRML

Question 41

The graphic in the accompanying figure is an example of ____.

A) check boxes
C) a combo box
B) radio buttons
D) a text area

Question 42

Which of the following mouse events is handled by the interface MouseMotionListener?

A) mouseExited
C) mouseDragged
B) mouseReleased
D) mousePressed

Question 43

When you press a meta key, the method ____ is executed.

A) metaKeyPressed
C) keyDown
B) keyPressed
D) keyTyped

Question 44

When you type a regular alphanumeric key, the ____ method is executed.

A) keyPressed
C) keyDown
B) keyTyped
D) keyUp

Question 45

Which of the following is NOT included in the Java applet in the accompanying figure?

A) Check box
C) Combo box
B) Radio button
D) List

Question 46

Which menu will appear first if it is added to the menu bar in the order shown in the accompanying figure?

A) fileMenu
C) viewMenu
B) editMenu
D) insertMenu

Question 47

In which of the following layout managers do all rows (columns) have the same number of components and all components have the same size?

A) GridLayout
C) BorderLayout
B) FlowLayout
D) EvenLayout

Question 48

Which of the following is the default layout manager for a Java application?

A) null
C) FlowLayout
B) GridLayout
D) BorderLayout

Question 49

A mouse can generate ____ different types of events.

A) three
C) seven
B) five
D) nine