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Chapter 18 The java.awt Package |
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Chapter 18 The java.awt Package |
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This class defines a polygon as an array of points. The points of the polygon may be specified by the constructor, or with the addPoint() method. getBoundingBox() returns the smallest Rectangle that contains the polygon, and inside() tests whether a specified point is within the Polygon. Note that the arrays of X and Y points and the number of points in the polygon (not necessarily the same as the array size) are defined as public variables. Polygon objects are used when drawing polygons with the Graphics.drawPolygon() and Graphics.fillPolygon() methods.
public class Polygon extends Object implements Shape, Serializable {
// Public Constructors
public Polygon();
public Polygon(int[] xpoints, int[] ypoints, int npoints);
// Public Instance Variables
public int npoints;
public int[] xpoints;
public int[] ypoints;
// Protected Instance Variables
1.1 protected Rectangle bounds;
// Public Instance Methods
public void addPoint(int x, int y);
1.1 public boolean contains(Point p);
1.1 public boolean contains(int x, int y);
# public Rectangle getBoundingBox();
1.1 public Rectangle getBounds(); // From Shape
# public boolean inside(int x, int y);
1.1 public void translate(int deltaX, int deltaY);
}
Graphics.drawPolygon(), Graphics.fillPolygon()
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| java.awt.Point (JDK 1.0) |  |
java.awt.PopupMenu (JDK 1.1) |
