Graphics and Java 2D - Java: How to Program Early Objects - page 591

e) Font sizes are measured in units called .
f) Class helps specify the fill for a shape using a pattern drawn in a BufferedImage .
13.2 State whether each of the following is true or false . If false , explain why.
a) The first two arguments of Graphics method drawOval specify the center coordinate of
the oval.
b) In the Java coordinate system, x -coordinates increase from left to right and y -coordi-
nates from top to bottom.
c) Graphics method fillPolygon draws a filled polygon in the current color.
d) Graphics method drawArc allows negative angles.
e) Graphics method getSize returns the size of the current font in centimeters.
f) Pixel coordinate (0, 0) is located at the exact center of the monitor.
13.3 Find the error(s) in each of the following and explain how to correct them. Assume that g
is a Graphics object.
a) g.setFont( "SansSerif") ;
b) g.erase(x, y, w, h); // clear rectangle at (x, y)
c) Font f = new Font( "Serif" , Font.BOLDITALIC , 12 );
d) g.setColor( 255 , 255 , 0 ); // change color to yellow

Answers to Self-Review Exercises
13.1 a) setStroke , Graphics2D . b) GradientPaint . c) drawLine . d) red, green, blue. e) points.
f) TexturePaint .
13.2

a) False. The first two arguments specify the upper-left corner of the bounding rectangle.

b) True.

c) True.

d) True.

e) False. Font sizes are measured in points.

f) False. The coordinate (0,0) corresponds to the upper-left corner of a GUI component

on which drawing occurs.

13.3

a) The setFont method takes a Font object as an argument—not a String .
b) The Graphics class does not have an erase method. The clearRect method should be
used.
c) Font.BOLDITALIC is not a valid font style. To get a bold italic font, use Font.BOLD +
Font.ITALIC .

d) Method setColor takes a Color object as an argument, not three integers.

Exercises
13.4 Fill in the blanks in each of the following statements:

a) Class of the Java 2D API is used to draw ovals.

b) Methods draw and fill of class Graphics2D require an object of type as their

argument.

c) The three constants that specify font style are , and .

d) Graphics2D method sets the painting color for Java 2D shapes.

13.5

State whether each of the following is true or false . If false , explain why.
a) Graphics method drawPolygon automatically connects the endpoints of the polygon.
b) Graphics method drawLine draws a line between two points.
c) Graphics method fillArc uses degrees to specify the angle.
d) In the Java coordinate system, values on the y -axis increase from left to right.
e) Graphics inherits directly from class Object .