Printing data in servlet

hello everyone,
I am trying to print some data on a servlet page by using the following code:
String s1="My name";
PrinterJob job=PrinterJob.getPrinterJob();
Book book = new Book();
book.append(new Printer("<html>\n<body>This is a test2</body></html>"), new PageFormat());
job.setPageable(book);
boolean doPrint = job.printDialog();
if (doPrint) {
try {
job.print();
} catch (PrinterException exception) {
System.err.println("Printing error: " + exception);
out.close();
it works when I test it with the above code but I get the following error when
I apply my own data:
java.lang.NullPointerException.
Basically the data I am applying to in not being carried over when I click the button to click:
The data I am using is:
String[] itmcod=request.getParameterValues("itemcd");
String[] itmnm=request.getParameterValues("itmname");
String[] itmdes=request.getParameterValues("itmdescrip");
String[] itmcolor=request.getParameterValues("itmcol");
String[] itmsi=request.getParameterValues("itmsize");
String[] itmprice=request.getParameterValues("itmpri");
Collpointorder collpointorder=new Collpointorder(itmcod, itmnm, itmdes, itmcolor, itmsi, itmprice);
out.println(collpointorder.toString());
out.println("<form method='get' action='vieworderser'>");
out.println("<input type='Submit' value='printord' name='Print Order'/>");
String prrequest=request.getParameter("printord");
if(prrequest==""){
String[] itmcod1=request.getParameterValues("itemcd");
String s1="My name";
PrinterJob job=PrinterJob.getPrinterJob();
Book book = new Book();
//book.append((s1), new PageFormat());
for (int i=0; i<=itmcod.length; i++){
//book.append(new Printer(" "+ itmcod1 + s1 + " " + itmcod[i] + " " + itmnm + " " + itmdes ), new PageFormat());
book.append(new Printer(" "+ itmcod1 + s1 + " "), new PageFormat());
//+ itmcod[i] + " " + itmnm + " " + itmdes ), new PageFormat());
//book.append(new Printer("<html>\n<body>This is a test2</body></html>"), new PageFormat());
job.setPageable(book);
boolean doPrint = job.printDialog();
if (doPrint) {
try {
job.print();
} catch (PrinterException exception) {
System.err.println("Printing error: " + exception);
}//end of if
}//end of loop
from the URL:
Before I click the button to printer, the URL is like:
vieworderser?itmname=asdf&itmdescrip=sdf&itmcol=sdzfa&itmsize=asdf&itmpri=asdf&itmdept=Collection+Point&itemcd=5475686&itmname=asdf&itmdescrip=asdf&itmcol=sdf&itmsize=qfasdf&itmpri=sdf&itmdept=Collection+Point&itemcd=857587&itmname=null&itmdescrip=null&itmcol=null&itmsize=null&itmpri=null&itmdept=Collection+Point&itm=itm
After clicking the button to print, the URL:
vieworderser?Print+Order=printord
I have tried using another servlet and also if statements:
So it clears away the data. I am not very familiar with the java printing api, so if anybody have any suggestion, please, pass on.
Thanks
eve

Sorry,
I might this code:
package servlet;
import StockInformation.Collpointorder;
import StockInformation.Printer;
import java.awt.print.Book;
import java.awt.print.PageFormat;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
* @author y.kwarteng
* @version
public class vieworderser extends HttpServlet {
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet vieworderser</title>");
        out.println("</head>");
        out.println("<body>");
                                        out.println("<form method='get' action='vieworderser'>");
                                            String[] itmcod=request.getParameterValues("itemcd");
                                           String[] itmnm=request.getParameterValues("itmname");
                                           String[] itmdes=request.getParameterValues("itmdescrip");
                                           String[] itmcolor=request.getParameterValues("itmcol");
                                            String[] itmsi=request.getParameterValues("itmsize");
                                           String[] itmprice=request.getParameterValues("itmpri");
                                           Collpointorder collpointorder=new Collpointorder(itmcod, itmnm, itmdes, itmcolor, itmsi, itmprice);
                                           out.println(collpointorder.toString());
                                           String[] itmcod2=collpointorder.getitmid();
                                            //out.println("<form method='get' action='vieworderser'>");
                                           out.println("<input type='Submit' value='printord' name='Print Order'/>");
                         String prrequest=request.getParameter("printord");
              if(prrequest!= null && prrequest.equals("Print Order")){
             try{
                 //RequestDispatcher dispatcher = getServletContext()
                                               //.getRequestDispatcher("/printorderser");
                                               //dispatcher.forward(request, response);
                                               for (int i=0; i<=itmcod.length; i++){
                                            out.print("this is the itemcode" +itmcod);}
}catch(Exception ex){
               System.err.println("Can not show the print page");
//if(prrequest!=""){
String[] itmcod1=request.getParameterValues("itemcd");
String s1="My name";
PrinterJob job=PrinterJob.getPrinterJob();
Book book = new Book();
//book.append((s1), new PageFormat());
for (int i=0; i<=itmcod1.length; i++){
//book.append(new Printer(" "+ itmcod1[i] + s1 + " " + itmcod[i] + " " + itmnm + " " + itmdes ), new PageFormat());
book.append(new Printer(" " + itmcod1[i] + s1 + " "), new PageFormat());
//+ itmcod[i] + " " + itmnm + " " + itmdes ), new PageFormat());
//book.append(new Printer("<html>\n<body>This is a test2</body></html>"), new PageFormat());
job.setPageable(book);
boolean doPrint = job.printDialog();
if (doPrint) {
try {
job.print();
} catch (PrinterException exception) {
System.err.println("Printing error: " + exception);
}//end of if
}//end of loop*/
                         /**try{
RequestDispatcher dispatcher = getServletContext()
.getRequestDispatcher("/printorderser");
dispatcher.include(request, response);
}catch(Exception ex){
System.err.println("Can not show the all items page");*/
out.println("<h1>Servlet vieworderser at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
out.close();
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/** Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
/** Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
/** Returns a short description of the servlet.
public String getServletInfo() {
return "Short description";
// </editor-fold>
Thanks
eve

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