Polygon won't show up

I made this code on one computer, then I saved the code in a text file so I could re-copy the text and make a new java file. I did this and everything compiled good, but when I run the applet it just has my black background without my polygon. Heres my code snippet where it draws:

Code:

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        public void paint (Graphics g) {
                    Graphics2D g2 = (Graphics2D) g;
                    g2.setPaint(new GradientPaint(150, 200,(new Color(255, 108, 91)), 260, 200, (new Color(200, 20, 7)), false));

                int []xpoints = {180,150,160,180,220,240,250,220};
                int []ypoints = {350,400,400,380,380,400,400,350};
                Polygon poly = new Polygon(xpoints, ypoints, xpoints.length);
                g.fillPolygon(poly);
        }

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Hard to test a method without the calling code.
Can you provide a SMALL program that compiles and executes and demonstrates your problem?

Well this is supposed to show a polygon that should look like the bottom of a rocket, it should have a light red to dark red gradient. My code looks like this:

Code:

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import java.applet.*;
import java.awt.*;

public class ballmove extends Applet implements Runnable {

        private Image dbImage;
        private Graphics dbg;

        public void init(){
                setBackground (Color.black);
        }

        public void start () {
                  Thread th = new Thread (this);
                th.start ();
        }

        public void stop() {
        }

        public void destroy(){
        }

        public void run () {
          Thread.currentThread().setPriority(Thread.MIN_PRIORITY);

          while (true) {

                  repaint();

                  try {
                            Thread.sleep (20);
                  }
                  catch (InterruptedException ex) {
                  }

                  Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
                  }
        }


        public void update (Graphics g) {
                  if (dbImage == null) {
                          dbImage = createImage (this.getSize().width, this.getSize().height);
                          dbg = dbImage.getGraphics ();
                  }

                  dbg.setColor (getBackground ());
                  dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);
                dbg.setColor (getForeground());
                  paint (dbg);
                  g.drawImage (dbImage, 0, 0, this);
                }
        public void paint (Graphics g) {
                    Graphics2D g2 = (Graphics2D) g;
                    g2.setPaint(new GradientPaint(150, 200,(new Color(255, 108, 91)), 260, 200, (new Color(200, 20, 7)), false));

                int []xpoints = {180,150,160,180,220,240,250,220};
                int []ypoints = {350,400,400,380,380,400,400,350};
                Polygon poly = new Polygon(xpoints, ypoints, xpoints.length);
                g.fillPolygon(poly);
        }
}

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I took out some of my movement variables that I'll be puting lin later. Thanks for the help.

Your posted code draws a red shaped polygon in the lower-center left part of the screen in Appletviewer: D:\Java\jdk1.6.0_02\bin\appletviewer.exe.
The red shape looks like a foot stool.

I know that's what it's supposed to do, but when I try to view it in internet explorer the red shape won't show up.

I got it. My applet size wasn't big enough. Thanks