Java EE (Java Enterprise Edition) General Discussion

Hello, I installed JDK 1.5 and Tomcat 5.5 on a machine Windows, I also installed iText 2.0.1 (i get a jar file and zip source folder)so that I can print out pdf files, but when I compile the servelts containing the codes to print out pdf files, a message is posted saying that the classes called (Document, pdfWriter.....) do not exist.

Is it me which badly installed iText or there are other modifications to make?? How can i proceed?

Help me

Here is the code

import java.io.IOException;
import java.util.Date;
import java.lang.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;

public class testpdf extends HttpServlet {
	   
    private static final long serialVersionUID = -6033026500372479591L;

    public void doPost (HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
         
        // step 1
        Document document = new Document(PageSize.A4, 50, 50, 50, 50);
        try {
            // step 2: we set the ContentType and create an instance of the corresponding Writer
            response.setContentType("application/pdf");
            PdfWriter.getInstance(document, response.getOutputStream());
            // step 3
            document.open();
            
            // step 4
            document.add(new Paragraph("Hello World"));
            document.add(new Paragraph(new Date().toString()));
        }
        catch(DocumentException de) {
            de.printStackTrace();
            System.err.println("document: " + de.getMessage());
        }
        
        // step 5: we close the document (the outputstream is also closed internally)
        document.close();
    }
}