Why is print called twice in

I am implementing my first program that does printing in Java. I tried an example that should work great for printing a continuous stream of data (multiple pages) from a database. I noticed that the print() method is called twice for every page. Why is this? It makes printing a result set difficult. Can someone point me to more information on why this happens and possibly how to get called only once per page? Can I ignore one of the calls or do I have to do the exact same thing on each call? Example below.

Thanks for the help,
Kerry

/**
 * Class: Example1 <p>
 *
 * @author Jean-Pierre Dube <jpdube@videotron.ca>
 * @version 1.0
 * @since 1.0
 * @see Printable
 */

import java.awt.*;
import java.awt.geom.*;
import java.awt.print.*;


public class Example1 implements Printable {

   //--- Private instances declarations
   private final double INCH = 72;



   /**
    * Constructor: Example1 <p>
    *
    */
   public Example1 () {
     
      //--- Create a printerJob object
      PrinterJob printJob = PrinterJob.getPrinterJob ();

      //--- Set the printable class to this one since we
      //--- are implementing the Printable interface
      printJob.setPrintable (this);
       
      //--- Show a print dialog to the user. If the user
      //--- click the print button, then print otherwise
      //--- cancel the print job
      if (printJob.printDialog()) {
         try {
            printJob.print();  
         } catch (Exception PrintException) {
            PrintException.printStackTrace();
         }
      }

   }


   /**
    * Method: print <p>
    *
    * This class is responsible for rendering a page using
    * the provided parameters. The result will be a grid
    * where each cell will be half an inch by half an inch.  
    *
    * @param g a value of type Graphics
    * @param pageFormat a value of type PageFormat
    * @param page a value of type int
    * @return a value of type int
    */
   public int print (Graphics g, PageFormat pageFormat, int page) {

      System.out.println("Page: " + page);
     
      int i;
      Graphics2D g2d;
      Line2D.Double line = new Line2D.Double ();

      //--- Validate the page number, we only print the first page
      if (page < 2) {

         //--- Create a graphic2D object a set the default parameters
         g2d = (Graphics2D) g;
         g2d.setColor (Color.black);

         //--- Translate the origin to be (0,0)
         g2d.translate (pageFormat.getImageableX (), pageFormat.getImageableY ());
         
         g2d.drawString ("Page " + page, 72, 72 * 2);
         
         return (PAGE_EXISTS);
      }
      else
         return (NO_SUCH_PAGE);
   }
   
   
   public static void main (String args[]) {
            new Example1();
            System.exit (0);
    }

} //Example1