Java Reference
In-Depth Information
Fig. 13.25
|
Drawing arcs. (Part 2 of 2.)
Polygons
are
closed multisided shapes
composed of straight-line segments.
Polylines
are
se-
quences of connected points
. Figure 13.26 discusses methods for drawing polygons and
polylines. Some methods require a
Polygon
object (package
java.awt
). Class
Polygon
's
constructors are also described in Fig. 13.26. The application of Figs. 13.27-13.28 draws
polygons and polylines.
Method
Description
Graphics
methods for drawing polygons
public void
drawPolygon(
int
[] xPoints,
int
[] yPoints,
int
points)
Draws a polygon. The
x
-coordinate of each point is specified in the
xPoints
array and the
y
-coordinate of each point in the
yPoints
array. The last argu-
ment specifies the number of
points
. This method draws a
closed polygon
. If
the last point is different from the first, the polygon is
closed
by a line that
connects the last point to the first.
public void
drawPolyline(
int
[] xPoints,
int
[] yPoints,
int
points)
Draws a sequence of connected lines. The
x
-coordinate of each point is spec-
ified in the
xPoints
array and the
y
-coordinate of each point in the
yPoints
array. The last argument specifies the number of
points
. If the last point is
different from the first, the polyline is
not
closed.
public void
drawPolygon(Polygon p)
Draws the specified polygon.
public void
fillPolygon(
int
[] xPoints,
int
[] yPoints,
int
points)
Draws a
filled
polygon. The
x
-coordinate of each point is specified in the
xPoints
array and the
y
-coordinate of each point in the
yPoints
array. The
last argument specifies the number of
points
. This method draws a
closed
polygon
. If the last point is different from the first, the polygon is
closed
by a
line that connects the last point to the first.
public void
fillPolygon(Polygon p)
Draws the specified
filled
polygon. The polygon is
closed
.
Fig. 13.26
|
Graphics
methods for polygons and class
Polygon
methods. (Part 1 of 2.)
