UNB/ CS/ David Bremner/ teaching/ java/ PolygonTest.java
```import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;

public class PolygonTest extends Applet
{  public void paint(Graphics g)
{  Graphics2D g2 = (Graphics2D)g;

Polygon triangle = new Polygon(3);

double x = 200;
double y = 200;
double r = 50;
Polygon pentagon = new Polygon(5);
for (int i = 0; i < 5; i++)
x + r * Math.cos(2 * Math.PI * i / 5),
y + r * Math.sin(2 * Math.PI * i / 5)));

triangle.draw(g2);
pentagon.draw(g2);
}
}

/**
A polygon is a closed curve made up from line segment
that join the corner points.
*/

class Polygon
{  /**
Constructs a polygon with a given number of corner
points.
@param n the number of corner points.
*/
public Polygon(int n)
{  corners = new Point2D.Double[n];
}

/**
Adds a corner point of the polygon. The point is
ignored if the maximum number of points has been added.
@param p the corner point
*/
}
}

/**
Draws the polygon.
@param g2 the graphics context
*/
public void draw(Graphics2D g2)
{  for (int i = 0; i < cornersSize; i++)
{  Point2D.Double from = corners[i];
Point2D.Double to
= corners[(i + 1) % corners.length];
g2.draw(new Line2D.Double(from, to));
}
}

private Point2D.Double[] corners;