I just made a sketch which I want to print. I'm puzzeling with Java's Print but I can't get it right..

Class:

2. public class HelloWorldPrinter implements Printable {
3. 
   
4.   public int print(Graphics g, PageFormat pf, int page) throws
5.     PrinterException {
6. 
   
7.     if (page > 0) { /* We have only one page, and 'page' is zero-based */
8.       return NO_SUCH_PAGE;
9.     }
10. 
    
11.     /* User (0,0) is typically outside the imageable area, so we must
12.      * translate by the X and Y values in the PageFormat to avoid clipping
13.      */
14.     Graphics2D g2d = (Graphics2D)g;
15.     g2d.translate(pf.getImageableX(), pf.getImageableY());
16. 
    
17.     /* Now we perform our rendering */
18.     //    g.drawString("Hello world!", 100, 100);
19.     //    g.drawString(day() + " " + month(), 100, 120);
20. 
    
21.     frame.printAll(g);
22. 
    
23.     /* tell the caller that this page is part of the printed document */
24.     return PAGE_EXISTS;
25.   }
26. }

Sketch:

2. import java.io.File;
3. import java.awt.print.*;
4. import java.awt.*;
5. import java.awt.event.*;
6. import javax.swing.*;
7. 
   
8. PImage[] IMGs;
9. int minWidth = -1;
10. ArrayList parts;
11. 
    
12. void setup(){
13.   PrinterJob job = PrinterJob.getPrinterJob(); 
14.   job.setPrintable(new HelloWorldPrinter());
15.   PageFormat pf = PrinterJob.getPrinterJob().defaultPage();
16.   parts = new ArrayList();
17.   
18.   ***** CODE *****
19. 
    
20.   println("Partssize: " + parts.size());
21.   
22.   for(int i = 0; i < parts.size(); i++){
23.     IMG part = (IMG) parts.get(i);
24.     image(part.img, 0, i, width, 1);    
25.   }
26.    
27.   saveFrame(); 
28.   
29.   try {
30.     println("Trying to print..");
31.     job.print();
32.     println("Printed");
33.   } 
34.   catch (PrinterException e) {
35.     /* The job did not successfully complete */
36.     println("Error:");
37.     println(e);
38.   }
39. }

_{(IMG is a class where I can store information about an image layer)}

Can someone explain to me what I'm doing wrong? I allready found that Java Print uses Graphic2D but I can't manage to convert the sketch to Graphic2D..