import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class DrawPolyPanel extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
Polygon p = new Polygon();
for (int i = 0; i < 5; i++)
p.addPoint((int) (100 + 50 * Math.cos(i * 2 * Math.PI / 5)),
(int) (100 + 50 * Math.sin(i * 2 * Math.PI / 5)));
g.drawPolygon(p);
Polygon s = new Polygon();
for (int i = 0; i < 360; i++) {
double t = i / 360.0;
s.addPoint((int) (150 + 50 * t * Math.cos(8 * t * Math.PI)),
(int) (150 + 50 * t * Math.sin(8 * t * Math.PI)));
}
g.drawPolygon(s);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setTitle("DrawPoly");
frame.setSize(350, 250);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = frame.getContentPane();
contentPane.add(new DrawPolyPanel());
frame.show();
}
}