Deck 16: Graphics

Question 1

You can instruct a Graphics object to use a font by inserting the font as the argument in a ____ method.

A) setColor()
B) drawString()
C) setCharacters()
D) setFont()

Answer 1

D

Question 2

If you call getGraphics() in a frame that is not visible, you receive a(n) ____.

A) ForceQuit
B) ExecuteException
C) NonExecute
D) NullPointerException

Answer 2

D

Question 3

The drawRoundRect() method requires ____ arguments.

A) three
B) four
C) six
D) eight

Answer 3

C

Question 4

The ____ method allows you to draw a String in a JFrame window.

A) drawString()
B) setFont()
C) drawLine()
D) setString()

Question 5

The first step in drawing a 2D object is to specify how a drawn object is rendered.

Question 6

The statements pen.drawLine(50, 50, 100, 200); and pen.drawLine(100, 200, 50, 50); will both draw straight lines that slant down and to the right.

Question 7

If a window is 100 pixels by 100 pixels, the statement goButton.setLocation(100, 100); would place the JButton component outside the window where it would be unseen.

Question 8

When using the drawRoundRect() method, if you assign ____ to the arc coordinates, the rectangle is not rounded; instead, the corners are square.

A) -1
B) 0
C) 10
D) 99

Question 9

If a window is 200 pixels wide by 100 pixels tall, you can place a Button named pressMe in the approximate center of the window with which of the following statements?

A) pressMe.setLocation(100,50);
B) pressMe.setPosition(100,50);
C) pressMe.setLocation(200,100);
D) pressMe.setPosition(200,100);

Question 10

The Color class contains ____ constants.

A) 3
B) 9
C) 13
D) 16

Question 11

The ____ method requires four arguments and draws the outline of a rectangle using the current drawing color.

A) clearRect()
B) drawRect()
C) fillRect()
D) paintRect()

Question 12

You can designate a Graphics color by calling the drawString() method.

Question 13

A Rectangle2D.Float can be created using five arguments representing the x-coordinate, y-coordinate, width, height, and position.

Question 14

Both Rectangle2D.Float and Rectangle2D.Double can be created using four arguments representing the x-coordinate, y-coordinate, width, and height.

Question 15

The ____ method draws what appears to be an empty rectangle.

A) clearRect()
B) emptyRect()
C) fillRect()
D) drawRect()

Question 16

A rectangle created with the clearRect() method is not transparent.

Question 17

The repaint() method calls another method named ____, which calls the paint() method.

A) destroy()
B) actionPerformed()
C) update()
D) super()

Question 18

The init() method of GeneralPath is used to create the beginning point of the polygon.

Question 19

Dimension(Dimension d) creates an instance of Dimension with a width of 0 and a height of 0.

Question 20

The FontMetrics class methods return an integer value representing the font size in points, with one point measuring 1/72 of an inch.

Question 21

Which of the following statements starts a polygon named pol at the coordinates 20 and 290?

A) pol.moveTo(20F, 290F);
B) pol.lineTo(20F, 290F);
C) pol = new Path(20F, 290F);
D) pol.newPath(20F, 290F);

Question 22

The draw3DRect() method has a ____ argument, which controls whether the rectangle is darker on the right and bottom, or lighter on the right and bottom.

A) cyclic gradient
B) fill pattern
C) null
D) Boolean value

Question 23

The position of a component can be changed by using the ____ method and passing it x- and y-coordinate positions.

A) drawString()
B) setLocation()
C) fillArc()
D) repaint()

Question 24

You can use the ____ method to copy any rectangular area to a new location.

A) copyRect()
B) copyArea()
C) copyGraphics()
D) addPoint()

Question 25

You can discover the fonts that are available on your system by using the ____ method.

A) searchFonts()
B) findFonts()
C) findAllFonts()
D) getAvailableFontFamilyNames()

Question 26

The ____________________ method returns an object of type Dimension, which specifies the width and height of the screen in pixels.

Question 27

Which statement sets the font of a Graphics object named brush to boldFont?

A) Font.setFont = brush
B) setFont = brush(boldFont)
C) brush.setFont(boldFont)
D) Font = setFont(boldFont)

Question 28

____ is the amount of space between the bottom of the descent of one line and the top of the characters in the successive line of type.

A) Descent
B) Ascent
C) Leading
D) Height of a line

Question 29

The ____ method creates a solid arc.

A) solidArc()
B) fillArc()
C) clearArc()
D) drawArc()

Question 30

Which of the following statements will correctly add a point to a polygon named myShape?

A) myShape.addPoint(50, 100)
B) addPoint = myShape(50, 100)
C) myShape.fillPolygon(50 100)
D) myShape = addPoint(50, 100)

Question 31

You can improve the appearance of strings drawn using Graphics objects by using the ____________________ method.

Question 32

If the beginning and ending points used with the fillPolygon() method are ____, the two endpoints are connected by a straight line before the polygon is filled with color.

A) connected
B) coordinate pairs
C) identical
D) not identical

Question 33

You can instantiate an empty Polygon object using which of the following statements?

A) Polygon someFutureShape = new Polygon(0,0,0,0);
B) Polygon someFutureShape = new Polygon();
C) Polygon someFutureShape = new Polygon(0);
D) Polygon someFutureShape = new Polygon(xPoints, yPoints, xPoints.length);

Question 34

To create an arc object named halfArc that looks like the top half of a circle, you could use the ____ statement to produce identical results to the following statement: halfArc.drawArc(x, y, w, h, 0, 180);.

A) halfArc.drawArc(x, y, w, h, 180, 0);
B) halfArc.drawArc(x, y, w, h, 180, -180);
C) halfArc.drawArc(x, y, w, h, -180, 180);
D) fillArc.drawArc(x, y, w, h, 180, -180);

Question 35

BasicStroke class variables determine the endcap and ____ style arguments.

A) stroke
B) line
C) juncture
D) fill

Question 36

You specify 2D colors by using the ____ method.

A) paint()
B) setPaint()
C) color()
D) setColor()

Question 37

The ____________________ method can be used when a window needs to be updated, such as when it contains new images or you have moved a new object onto the screen.

Question 38

You use the ____________________ method in statements to add points to a polygon.

Question 39

You use the ____________________ method to draw a rectangle that appears to have "shadowing" on two of its edges-the effect is that of a rectangle that is lit from the upper-left corner and slightly raised or slightly lowered.

Question 40

The ____ method provides information about the system in use.

A) getSystemInfo()
B) getDefaultToolkit()
C) getDefaultControlPanel()
D) getToolkit()

Question 41

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Returns the number of pixels as an integer

Question 42

Describe what happens when the update() method is called.

Question 43

Why would a programmer use the repaint() method?

Question 44

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Used to create lines

Question 45

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Draws a solid shape

Question 46

What are the three arguments the BasicStroke constructor takes?

Question 47

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Does not cycle between the colors

Question 48

What are the constructors for the Dimension class?

Question 49

What activities does the process of drawing with Java 2D objects include?

Question 50

How can a programmer find and gather all the available fonts on a computer system?

Question 51

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Works best with lighter drawing colors

Question 52

How do you use the drawOval() method to draw an oval?

Question 53

What parameters does the copyArea() method require?

Question 54

To create a rectangle with rounded corners, the drawRoundRect() method is used. Describe the six arguments that are required to create rounded rectangles.

Question 55

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Controls how a drawing object is filled in

Question 56

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Used to create polygons

Question 57

List the six arguments you need to provide for the drawArc() method.

Question 58

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
Measures the parts of characters that "hang below" the baseline

Question 59

Match each term with the correct statement below.
a.fill pattern
f.fillPolygon()
b.GREEN
g.getScreenResolution()
c.acyclic gradient
h.GeneralPath
d.3D method
i.descent
e.Line2D.Float class
A Color class constant

Question 60

In the drawPolygon() method, what are the three arguments and what values do they represent?

Question 61

The getFontMetrics() method can be used to discover a font's statistics. Describe the getLeading(), getAscent(), getDescent(), and getHeight() methods, and how they are used with the getFontMetrics() method.

Question 62

A rectangle is drawn with the following statement:
tool.drawRect(50, 50, 100, 60);
An oval is drawn with the following statement:
tool.drawOval(50, 50, 100, 60);
Describe the resulting output, and describe how the four arguments are used to draw the objects.

Question 63

A Polygon object is created by defining movements from one point to another. Describe the statements that are used to create a Polygon object.

Question 64

Write the statement to instruct a Graphics object named myGraphic to apply blue paint.

Question 65

import javax.swing.*;
import java.awt.*;
import java.awt.Color;
public class JDemoRectangles extends JFrame
{
Container con = getContentPane();
public JDemoRectangles()
{
con.setBackground(Color.BLUE);
con.setLayout(new FlowLayout());
}
public void paint(Graphics gr)
{
super.paint(gr);
gr.setColor(Color.RED);
gr.fillRect(40, 40, 120, 120);
gr.setColor(Color.YELLOW);
gr.fillRect(80, 80, 160, 160);
gr.clearRect(50, 60, 50, 50);
}
public static void main(String[] args)
{
JDemoRectangles frame = new JDemoRectangles();
frame.setSize(200, 200);
frame.setVisible(true);
}
}
Using the above code, describe what objects are drawn using the shaded statements of the paint() method.

Question 66

BasicStroke myLine = new BasicStroke(12.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND);
The above statement creates a BasicStroke object and makes it the current stroke. Describe the three arguments that are used in this statement, and then describe the purpose of each.

Question 67

Write the statement to create an Arc2D.Float object named myArc at 20, 143, with a width of 50 and a height of 43; with a starting degree of 50, 140 degrees traveled; and using the class variable Arc2D.PIE.

Question 68

import javax.swing.*;
import java.awt.*;
public class JDemoFont extends JFrame
{
Font bigFont = new Font("Serif", Font.ITALIC, 48);
String hello = "Hello";
public void paint(Graphics brush)
{
super.paint(brush);
brush.setFont(bigFont);
brush.drawString(hello, 10, 100);
}
public static void main(String[] args)
{
JDemoFont frame = new JDemoFont();
frame.setSize(180, 150);
frame.setVisible(true);
}
}
The above code shows an application that uses the setFont() method with a Graphics object named brush. Describe what will occur when the two shaded lines of code are executed.

Question 69

The draw3DRect() method is used to draw rectangles that appear to have "shadowing" on two of their edges. Five arguments are used to create shadowed rectangles. Describe the five arguments.

Question 70

Write the statement to position a JLabel object named myLabel at the upper-left corner of a JFrame.

Question 71

Write the statement to set the font of a Graphics object named myStyle to the font fancyFont.

Question 72

Write the statement to create a Rectangle2D.Float object named myRect at 20, 20 with a width of 80 and height of 50.

Question 73

import javax.swing.*;
import java.awt.*;
import java.awt.Color;
public class JDemo3DRectangles extends JFrame
{
public void paint(Graphics gr)
{
super.paint(gr);
final int WIDTH = 60, HEIGHT = 80;
gr.setColor(Color.PINK);
gr.fill3DRect(20, 40, WIDTH, HEIGHT, true);
gr.fill3DRect(100, 40, WIDTH, HEIGHT, false);
}
public static void main(String[] args)
{
JDemo3DRectangles frame = new JDemo3DRectangles();
frame.setSize(180, 150);
frame.setVisible(true);
}
}
The highlighted code above creates two filled 3D rectangles. Describe how the color of the rectangles is set, and explain the five arguments that are used to draw the rectangles.

Question 74

Write the statement to draw a rectangle that begins at position 30, 100 and is 150 pixels wide by 40 pixels tall.