How to use GeneralPath class

[Java Tip]

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;

import javax.swing.JApplet;
import javax.swing.JFrame;

public class GeneralPathDemo2D extends JApplet {
  public void init() {
    setBackground(Color.white);
    setForeground(Color.white);
  }

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);

    g2.setPaint(Color.gray);
    int x = 5;
    int y = 7;

    // draw GeneralPath (polygon)
    int xPoints[] = { x, 200, x, 200 };
    int yPoints[] = { y, 200, 200, y };
    GeneralPath polygon = new GeneralPath(GeneralPath.WIND_EVEN_ODD,
        xPoints.length);
    polygon.moveTo(xPoints[0], yPoints[0]);
    for (int index = 1; index < xPoints.length; index++) {
      polygon.lineTo(xPoints[index], yPoints[index]);
    }
    polygon.closePath();

    g2.draw(polygon);
    g2.drawString("GeneralPath", x, 250);

  }

  public static void main(String s[]) {
    JFrame f = new JFrame("");
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    JApplet applet = new GeneralPathDemo2D();
    f.getContentPane().add("Center", applet);
    applet.init();
    f.pack();
    f.setSize(new Dimension(300, 300));
    f.show();
  }
}