Quiz 12: Advanced Guis and Graphics

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

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

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

You can create an applet by extending the class JFrame.

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

The class Graphics is an abstract class.

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

Applets do not have titles.

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

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

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

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

The R in RGB stands for Right.

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

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

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

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

You cannot convert a GUI application into an applet.

JTextAreas can be used to display multiple lines of text.

JCheckBox is a subclass of the abstract class ToggleButton.

Clicking on a JCheckBox generates an item event.

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

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

A JComboBox generates an ItemEvent.

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

What class must be extended when you create an applet? A) AWT C) JApplet B) JDK D) Graphics

Which applet method is called by the Web browser to display the applet to the screen? A) drawApplet() C) paintApplet() B) paint() D) setApplet()

Applets are embedded in ____ documents. A) HTTP C) HTML B) TCP D) VRML

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

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.

What HTML tags begin and end a Web page? A) C) B) D)

How many inches is 12-point font? A) 1/6 C) 6 B) 1 D) 72

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);

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);

What class can be used to generate a random number? A) JApplet C) Math B) Graphics D) RandomNumber

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);

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);

To draw a rectangle filled with the current color, you can use the method ____. A) drawRect() C) drawOval() B) fillRect() D) fillOval()

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();

Which of the following methods does the class JTextArea inherit from the class JTextComponent? A) setLineWrap() C) setColumns() B) setTabsize() D) setText()

The graphic in the accompanying figure is an example of ____. A) check boxes C) a combo box B) radio buttons D) a text area

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

Which of the following is the default layout manager for a Java application? A) null C) FlowLayout B) GridLayout D) BorderLayout

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

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

Which of the following mouse events is handled by the interface MouseMotionListener? A) mouseExited C) mouseDragged B) mouseReleased D) mousePressed

When you press a meta key, the method ____ is executed. A) metaKeyPressed C) keyDown B) keyPressed D) keyTyped

When you type a regular alphanumeric key, the ____ method is executed. A) keyPressed C) keyDown B) keyTyped D) keyUp

A mouse can generate ____ different types of events. A) three C) seven B) five D) nine