Java tutorial
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(); } }