Polygon in Java

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class DrawPolygon extends JPanel {
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
  g.setColor(Color.red);
     Polygon polygon1= new Polygon();
     for (int i = 0; i < 3; i++){
      polygon1.addPoint((int) (40 + 50 * Math.cos(i * 2 * Math.PI / 3)),
          (int) (150 + 50 * Math.sin(i * 2 * Math.PI / 3)));
   }
   g.drawPolygon(polygon1);

     Polygon polygon2= new Polygon();
     for (int i = 0; i < 6; i++){
      polygon2.addPoint((int) (160 + 50 * Math.cos(i * 2 * Math.PI / 6)),
          (int) (150 + 50 * Math.sin(i * 2 * Math.PI / 6)));
   }
   g.drawPolygon(polygon2);

    Polygon polygon3 = new Polygon();
 
     for (int i = 0; i < 360; i++) {
      double value = i / 360.0;
      polygon3.addPoint((int) (290 + 50 * value * Math.cos(8 * value * Math.PI)),
          (int) (150 + 50 * value * Math.sin(8 * value * Math.PI)));
   }
      g.drawPolygon(polygon3);
   }
 
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setTitle("Show Different Polygons");
    frame.setSize(350, 250);
    Container contentPane = frame.getContentPane();
    contentPane.add(new DrawPolygon());
    frame.show();
  }
}