[iText] Problama di import

[unit1]

Salve,

Sto cercando di far un programma che usa i pdf e per far questo le librerie che dovrei importare sono le itext (http://itextpdf.com/) uso Linux Ubuntu e per installare queste librerie ho usato "Sistema/Amministrazione/Gestore di pacchetti", li ho installato:

libitext1-java
libitext-java
libitext-java-gcj
libitext-rups-java

e non ho settato altro, che io sappia dovrebbe bastare ma quando vado a compilare un esempio:

file: HelloWorldMeta.java (trovato nel sito già fatto)

/*

 * $Id: HelloWorldMeta.java,v 1.5 2005/05/09 11:52:44 blowagie Exp $

 * $Name:  $

 *

 * This code is part of the 'iText Tutorial'.

 * You can find the complete tutorial at the following address:

 * http://itextdocs.lowagie.com/tutorial/

 *

 * This code is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 *

 * itext-questions@lists.sourceforge.net

 */



package com.lowagie.examples.general;



import java.io.FileOutputStream;

import java.io.IOException;



import com.lowagie.text.*;

import com.lowagie.text.pdf.PdfWriter;



/**

 * Generates a simple PDF file with metadata.

 * 

 * @author blowagie

 */



public class HelloWorldMeta {



	/**

	 * Generates a PDF file with metadata

	 * 

	 * @param args no arguments needed here

	 */

	public static void main(String[] args) {



		System.out.println("Metadata");



		// step 1: creation of a document-object

		Document document = new Document();

		try {

			// step 2:

			// we create a writer that listens to the document

			// and directs a PDF-stream to a file

			PdfWriter.getInstance(document,

					new FileOutputStream("HelloWorldMeta.pdf"));



			// step 3: we add some metadata open the document

			document.addTitle("Hello World example");

            document.addSubject("This example explains how to add metadata.");

            document.addKeywords("iText, Hello World, step 3, metadata");

            document.addCreator("My program using iText");

            document.addAuthor("Bruno Lowagie");

			document.open();

			// step 4: we add a paragraph to the document

			document.add(new Paragraph("Hello World"));

		} catch (DocumentException de) {

			System.err.println(de.getMessage());

		} catch (IOException ioe) {

			System.err.println(ioe.getMessage());

		}



		// step 5: we close the document

		document.close();

	}

}

mi succede questo:

javac HelloWorldMeta.java 
HelloWorldMeta.java:21: package com.lowagie.text does not exist
import com.lowagie.text.*;
^
HelloWorldMeta.java:22: package com.lowagie.text.pdf does not exist
import com.lowagie.text.pdf.PdfWriter;
                           ^
HelloWorldMeta.java:42: cannot find symbol
symbol  : class Document
location: class com.lowagie.examples.general.HelloWorldMeta
		Document document = new Document();
		^
HelloWorldMeta.java:42: cannot find symbol
symbol  : class Document
...

Qualcuno mi potrebbe spiegare come si fa? dove sto sbagliando?