1. 
   import com.itextpdf.text.*;
   import com.itextpdf.text.pdf.PdfWriter;
   import java.io.FileNotFoundException;
   import java.io.FileOutputStream;
   
   void setup() {
   
     Document document = new Document();
   
     try {
       PdfWriter.getInstance(document, new FileOutputStream("/home/algo/sketchbook/Divers/pdf_itext/Anchor.pdf"));
       document.open();
   
       Paragraph paragraph = new Paragraph();
       paragraph.add(new Phrase("Tu peux trouver le bonheur ici :"));
       Anchor anchor = new Anchor("link");
       anchor.setReference("http://www.mousse-au-chocolat.fr/");
   
       paragraph.add(anchor);
   
       document.add(paragraph);
   
       document.close();
     }
     catch (DocumentException e) {
       e.printStackTrace();
     }
     catch (FileNotFoundException e) {
       e.printStackTrace();
     }
     endRecord();
   }
   

1. Exception in thread "Animation Thread" java.lang.NoSuchMethodError: processing.pdf.PGraphicsPDF.getContent()Lcom/lowagie/text/pdf/PdfContentByte;
       at pdf_weblink_toxi.setup(pdf_weblink_toxi.java:71)
       at processing.core.PApplet.handleDraw(Unknown Source)
       at processing.core.PApplet.run(Unknown Source)
       at java.lang.Thread.run(Thread.java:662)

You may be using a library that's incompatible with this version of processing

1.  PdfContentByte cb = pdf.getContent();

1. // [toxi20070821] added accessor method
2.   public PdfContentByte getContent() {
3.       return content;
4.   }

1. cannot convert form PdfContentByte to PdfContentByte

1. /**
2.  * iText/Processing PDF weblink demo
3.  * Builds a number of links on the fly and
4.  * positions them randomly on the page.
5.  *
6.  * CAUTION: This demo requires a modified version of
7.  * Processing's PGraphicsPDF class
8.  *
9.  * @author: info at toxi dot co dot uk
10.  */
11. import processing.pdf.*;
12. import com.lowagie.text.*;
13. import com.lowagie.text.pdf.*;
14. import java.awt.Color;
15. import com.itextpdf.text.pdf.PdfContentByte;
16. void setup() {
17.   pageSize(com.lowagie.text.PageSize.A6, false, JAVA2D);
18.   PGraphicsPDF pdf=(PGraphicsPDF)beginRecord(PDF, "test"+(System.currentTimeMillis()/1000)+".pdf");
19.   // draw something in the background
20.   for (int i=0; i < height; i+=10) {
21.     line(0, 0, width, i);
22.     line(width, height, 0, i);
23.   }
24.   try {
25.     // build hyperlinks for these del.icio.us users
26.     String[] users=new String[] {
27.       "adm",
28.       "blackbeltjones",
29.       "d3",
30.       "garuda",
31.       "golan",
32.       "hahakid",
33.       "jbleecker",
34.       "lennyjpg",
35.       "reas",
36.       "toxi"
37.     };
38.     for (int i=0; i < users.length; i++) {
39.       // java colours are normalized 0.0 .. 1.0
40.       Color linkCol = new Color(random(1), random(1), random(1));
41.       // com.lowagie.text. to avoit ambiguous issues
42.       com.lowagie.text.Chunk c=new com.lowagie.text.Chunk(users[i], com.lowagie.text.FontFactory.getFont(com.lowagie.text.FontFactory.HELVETICA, 14, com.lowagie.text.Font.UNDERLINE, linkCol));
43.       c.setBackground(new Color(0, 0, 0), 5, 5, 5, 5);
44.       c.setAnchor("http://del.icio.us/"+users[i]);
45.       // this is using a hacked version of PGraphicsPDF to get access to the PDF content
46.       PdfContentByte cb = pdf.getContent();
47.       ColumnText ct = new ColumnText(cb);
48.       float x=random(width-100);
49.       float y=random(height-100);
50.       ct.setSimpleColumn(new Phrase(c), x, y, x+100, y+50, 16, Element.ALIGN_CENTER);
51.       ct.go();
52.     }
53.   }
54.   catch(Exception e) {
55.     e.printStackTrace();
56.   }
57.   endRecord();
58. }
59. // see link below for more info about this method:
60. // http://www.toxi.co.uk/blog/2007/07/specifying-pdf-page-size-in-processing.htm
61. void pageSize(com.lowagie.text.Rectangle r, boolean isLandscape, String renderer) {
62.   if (isLandscape) {
63.     size((int)r.TOP, (int)r.RIGHT, renderer);
64.   }
65.   else {
66.     size((int)r.RIGHT, (int)r.TOP, renderer);
67.   }
68. }

1. import processing.core.*;
2. import processing.pdf.*;
3.  
4. import com.lowagie.text.*;
5. import com.lowagie.text.pdf.*;
6.  
7. public class SpecialPGraphicsPDF extends PGraphicsPDF
8. {
9.   public PdfContentByte getContent()
10.   {
11.     return content;
12.   }
13. }

1. import processing.pdf.*;
2. 
   
3. import java.awt.Color;
4. 
   
5. import com.lowagie.text.*;
6. import com.lowagie.text.pdf.*;
7. 
   
8. void setup()
9. {
10.   size(400, 400, "SpecialPGraphicsPDF", "H:/Temp/Test.pdf");
11.   // draw something in the background
12.   for (int i = 0; i < height; i += 10) {
13.     line(0, 0, width, i);
14.     line(width, height, 0, i);
15.   }
16.   // build hyperlinks for these del.icio.us users
17.   String[] users = new String[] {
18.     "adm",
19.     "blackbeltjones",
20.     "d3",
21.     "garuda",
22.     "golan",
23.     "hahakid",
24.     "jbleecker",
25.     "lennyjpg",
26.     "reas",
27.     "toxi"
28.   };
29.   try {
30.     for (int i = 0; i < users.length; i++) {
31.       // java colours are normalized 0.0 .. 1.0
32.       Color linkCol = new Color(random(1), random(1), random(1));
33.       Chunk c = new Chunk(users[i], FontFactory.getFont(FontFactory.HELVETICA, 14, Font.UNDERLINE, linkCol));
    
34.       c.setBackground(new Color(0, 0, 0), 5, 5, 5, 5);
35.       c.setAnchor("http://del.icio.us/" + users[i]);
36.       // this is using a hacked version of PGraphicsPDF to get access to the PDF content
37.       PdfContentByte cb = ((SpecialPGraphicsPDF) g).getContent();
38.       ColumnText ct = new ColumnText(cb);
39.       float x = random(width-100);
40.       float y = random(height-100);
41.       ct.setSimpleColumn(new Phrase(c), x, y, x+100, y+50, 16, Element.ALIGN_CENTER);
42.       ct.go();
43.     }
44.   }
45.   catch(Exception e) {
46.     e.printStackTrace();
47.   }
48.   exit();
49. }

1.   size(400, 400, "SpecialPGraphicsPDF", "/home/algo/sketchbook/Divers/test.pdf");

1. Exception in thread "Animation Thread" java.lang.RuntimeException: You need to use "Import Library" to add SpecialPGraphicsPDF to your sketch.
2.     at processing.core.PApplet.makeGraphics(Unknown Source)
3.     at processing.core.PApplet.size(Unknown Source)
4.     at pdf_export_philho.setup(pdf_export_philho.java:33)
5.     at processing.core.PApplet.handleDraw(Unknown Source)
6.     at processing.core.PApplet.run(Unknown Source)
7.     at java.lang.Thread.run(Thread.java:662)

when the original class is well made, you can extend it without any modification, that's the power of OOP

1. The type com.itextpdf.PdfContentByte cannot be resolved. It is indirectly referenced from required .class files

1. import processing.pdf.*;
2. import java.awt.Color;
3. import com.lowagie.text.*;
4. import com.lowagie.text.pdf.*;
5. void setup()
6. {
7.   pageSize(com.lowagie.text.PageSize.A6, false, JAVA2D);
8.   SpecialPGraphicsPDF pdf=(SpecialPGraphicsPDF)beginRecord("SpecialPGraphicsPDF", "test"+(System.currentTimeMillis()/1000)+".pdf");
9.   //size(400, 400, "SpecialPGraphicsPDF", "test"+(System.currentTimeMillis()/1000)+".pdf");
10.   // draw something in the background
11.   for (int i = 0; i < height; i += 10) {
12.     line(0, 0, width, i);
13.     line(width, height, 0, i);
14.   }
15.   // build hyperlinks for these del.icio.us users
16.   String[] users = new String[] {
17.     "adm",
18.     "blackbeltjones",
19.     "d3",
20.     "garuda",
21.     "golan",
22.     "hahakid",
23.     "jbleecker",
24.     "lennyjpg",
25.     "reas",
26.     "toxi"
27.   };
28.   try {
29.     for (int i = 0; i < users.length; i++) {
30.       // java colours are normalized 0.0 .. 1.0
31.       Color linkCol = new Color(random(1), random(1), random(1));
32.       Chunk c = new Chunk(users[i], FontFactory.getFont(FontFactory.HELVETICA, 14, Font.UNDERLINE, linkCol));
33.       c.setBackground(new Color(0, 0, 0), 5, 5, 5, 5);
34.       c.setAnchor("http://del.icio.us/" + users[i]);
35.       // this is using a hacked version of PGraphicsPDF to get access to the PDF content
36.       PdfContentByte cb = pdf.getContent();
37.       ColumnText ct = new ColumnText(cb);
38.       float x = random(width-100);
39.       float y = random(height-100);
40.       ct.setSimpleColumn(new Phrase(c), x, y, x+100, y+50, 16, Element.ALIGN_CENTER);
41.       ct.go();
42.     }
43.   }
44.   catch(Exception e) {
45.     e.printStackTrace();
46.   }
47.   endRecord();
48.   //exit();
49. }
50. void pageSize(com.lowagie.text.Rectangle r, boolean isLandscape, String renderer) {
51.   if (isLandscape) {
52.     size((int)r.TOP, (int)r.RIGHT, renderer);
53.   }
54.   else {
55.     size((int)r.RIGHT, (int)r.TOP, renderer);
56.   }
57. }

1. isRecording(), or this particular variation of it, is not available with this renderer.