JSP Object Cannot be resolved to a type

hi!
i'm new to the jsp business nd i tried to create a 3 tier program with a web interface where the web pulls out data from the data base through RMI. here UserDataObject is the interface that extends Remote interface.
However this same code works perfectly when i run it from a servlet. but it dusnt seem to work with JSP...i use tomcat 5.5 and everything is in place..(WEB-INF etc)
this is the code:
<%
try {
UserDataObject udo = (UserDataObject) Naming.lookup("//localhost:1099/Item");
Vector v = udo.getByStatus(username,0);
} catch (NotBoundException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (SQLException e){
e.printStackTrace();
%>and this is the error i get!
An error occurred at line: 110 in the jsp file: /selling.jsp
Generated servlet error:
UserDataObject cannot be resolved to a typeI am quite confident that there's nothing wrong with RMI, since data runs back and forth in the servlets and the other application i made..
my problem is How come the same code that works perfectly in servlet doesnt work in jsp...?
plz help me out
thnx
nandun

well...thnx for all the replies...how ever i did solve this problem after struggling with it for about 8 hrs...
thr trick is to put the class UserDataObject in a pakcage and import it at the top of the jsp page..
ie.
<%@ page import = "rmi.UserDataObject"%> etc...
rmi is the package i stuffed it in...
hope some1 finds this helpful and think good thoughts about me!
cheers
nandun

Similar Messages

Include JSP in JSP - Error: cannot be resolved to a type

Hello,
Several of my jsp pages include other jsp pages. The project has many errors: "x cannot be resolved to a type". Is there a way to resolve these errors? Below is a small example of the issue:
JSP #1:
<%@ page import="com.testing.Introduction" %>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Hello</title>
</head>
<body>
<%
     Introduction intro = new Introduction();
     String speak = intro.sayHello();
%>
<p><%=speak %></p>
<%@ include file="Name.jsp" %>
</body>
</html> JSP #2:
<html>
<head>
<title>Name</title>
</head>
<body>
<%
     String speak2 = intro.sayName();
%>
<p>
<%=speak2 %>
</p>
</body>
</html>Class:
package com.testing;
public class Introduction
     public static void main(String[] args) {
     public Introduction() {
          super();
     public String sayHello() {
          return "Hello";
     public String sayName()     {
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}The error shows up in Name.jsp; the issue is with "intro". Any ideas how to resolve this issue?
Thank you in advance for your help!

The jsp page Name.jsp appears to be missing the import statement that appears in the first page.
<%@ page import="com.testing.Introduction" %>The included file is included character for character into the main page which is then treated as a single jsp page for the response. The include directive is invoked at the time of page translation. Given this, I don't see the purpose of using the <html> <head> and <title> tags in the second and included page. I don't think that this suggests the proper purpose of the include directive.
Note too that if the included file changes, all of the jsp files that call this file need to be updated as well. Servers can handle the alteration of the main jsp, but may not serve the altered content if the included file changes.
For more information see here. http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/JSPIntro8.html

[JSP] UserTransaction cannot be resolved to a type

I have a JSP page that uses the UserTransaction type, but iam getting an error:
UserTransaction cannot be resolved to a typeI have imported UserTransaction using this code:
<%@ page import="java.sql.*,javax.transaction.*" %>Is there a separate Jar for UserTransaction that needed to be copied to the classpath?

The implementation is provided by your container so check in your container's jee jar.

JSP impot class cannot be resolved to a type

This has got to be an easy problem but we cannot seem to figure it out.
I am using Tomcat 6.0.18 and JRE 1.5.09
This is my class:
package hello;
public class hello{
public void run(){
System.out.println("Hello World");
}}This is my JSP:
<%@ page language="java" import="java.util.* , java.io.* , java.text.*" errorPage="error.jsp"%>
<%@ page import="hello.*" %>
<%
hello h = new hello();
h.run();
%>and this is the error:
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 7 in the jsp file: /test.jsp
hello cannot be resolved to a type
4:
5: <%
6:
7: hello h = new hello();
8: h.run();
9:
10: %>
I have the "hello.class" in
C:\Tomcat6\webapps\ROOT\WEB-INF\classes\hello
C:\Tomcat6\webapps\ROOT\WEB-INF\classes
C:\Tomcat6\webapps\ROOT\WEB-INF
C:\Tomcat6\webapps\manager\WEB-INF\classes\hello
C:\Tomcat6\webapps\manager\WEB-INF\classes
C:\Tomcat6\webapps\manager\WEB-INF
C:\Tomcat6\webapps\host-manager\WEB-INF\classes\hello
C:\Tomcat6\webapps\host-manager\WEB-INF\classes
C:\Tomcat6\webapps\host-manager\WEB-INF
Can someone pelase offer a suggestion and please tell me where the CLASS file should actually reside? Please?

hii..
Try this code.I hope u wil get the output.
test.jsp
<%@ page language="java" import="java.util.* , java.io.* , java.text.*" errorPage="error.jsp"%>
<%@ page import="hello.*" %>
<html>
<head></head>
<body><%
hello h = new hello();
out.println( h.run());%>
</body>
</html>
hello.java
package hello;
public class hello{
public String run(){
String a="Hello World";
return a;
}}

Cannot be resolved to a type

Hello everybody,
An error occurred while executing these codes
<%@page import="examples.simple.ActiveClass" %>
try
String userId=request.getParameter("userID");
String activateCode=request.getParameter("activationCode");
ActiveClass object=new ActiveClass();
String status=object.Activate(userId);
if(status.equals("success"))
ok
catch(Exception e)
The error displayed was:
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 25 in the jsp file: /simple/activeAccount.jsp
ActiveClass cannot be resolved to a type
22: String userId=request.getParameter("userID");
23: String activateCode=request.getParameter("activationCode");
24:
25: ActiveClass object=new ActiveClass();
26: String status=object.Activate(userId);
27:
28: if(status.equals("success"))
Can anyone help me out please?

* ActiveClass.java
* Created on August 31, 2007, 3:04 PM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package examples.simple;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
import examples.sql.connect;
* @author Administrator
public class ActiveClass {
int userId;
Connection con=null;
/** Creates a new instance of ActiveClass */
public ActiveClass() {
public String Activate(String userId)
this.userId=Integer.parseInt(userId);
try
connect conn=new connect();
con=conn.createConnection();
Statement stmt=con.createStatement();
String sql="UPDATE registered_user SET user_privileges='Y' WHERE user_id = "+this.userId;
if(stmt.executeUpdate(sql)==1)
return "success";
else
return "failure";
catch (SQLException ex)
ex.printStackTrace();
return "failure";
}

Runtime error - Session cannot be resolved to a type

Hello! I try to get JavaMail working, but all in vain.
The problem is I get such an error every time.
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 29 in the jsp file: /SendMail.jsp
Session cannot be resolved to a type
26:    prop.put("mail.smtp.host",hostMail);
27:    prop.put("mail.smtp.user",fromEmail);
28:    prop.put("mail.smtp.auth","true");
29:    Session ses = Session.getInstance(prop,null);
30:    ses.setDebug(true);
31:    MimeMessage msg = new MimeMessage(ses);
32:    MimeBodyPart m1 = new MimeBodyPart();
An error occurred at line: 29 in the jsp file: /SendMail.jsp
Session cannot be resolved
26:    prop.put("mail.smtp.host",hostMail);
27:    prop.put("mail.smtp.user",fromEmail);
28:    prop.put("mail.smtp.auth","true");
29:    Session ses = Session.getInstance(prop,null);
30:    ses.setDebug(true);
31:    MimeMessage msg = new MimeMessage(ses);
32:    MimeBodyPart m1 = new MimeBodyPart();
Stacktrace:
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:435)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:729)I'm using Eclipse, so I've added external JARs there (activation.jar, mail.jar, mailapi.jar, pop3.jar, smtp.jar). In addition to this, the same libraries are in +/opt/jdk1.6.0_13/jre/lib/+.
I've imported javax.mail.*, java.util.*, javax.mail.internet.* in my JSP file. I tried to do a lot of manipulations. Also I tried to use different code examples, but the error in the line "Session.getInstance(props, null)" remains the same.
   Properties prop = new Properties();
   prop.put("mail.smtp.host",hostMail);
   prop.put("mail.smtp.user",fromEmail);
   prop.put("mail.smtp.auth","true");
   Session ses = Session.getInstance(prop,null);The same problem remains when I do this as a Servlet. Class compilation with javac occurs without errors.
Might the problem be in version compatibility? I use: ArchLinux, Tomcat 5.5, JavaMail 1.4.2.
Thanks in advance.
Edited by: Pavel_Z on May 7, 2009 4:55 PM

Now I am confident that the problem is with library including, as the same thing happens with other libraries.
I found that such a warning appears every time:
Classpath entry /jspbook/src/lib/mail.jar will not be exported or published. Runtime ClassNotFoundExceptions may result.Unfortunately, I've no idea how to include this in a proper way. I think that setting it in "Add External JARs" in "Java Build Path" is enough... or not?
Seems we're close to solve the problem. May be this screen shot will be helpful to determine the problem?
http://img257.imageshack.us/img257/3967/screenshotjavaeejspbook.png
You can see that libraries are included in the Project Explorer

HttpServletRequest cannot be resolved to a type in JSP - eclipse

Hi,
i've created a webapp in eclipse ver 3.2.
my jsp looks like this:
<%!
private boolean checkLoginRule(HttpServletRequest request, HttpServletResponse response, Integer nLevel) {
// if user was already authenticated pass him on
if (request.getSession(true).getAttribute("userID") == null)
response.sendRedirect("index.jsp");
else {
Integer nUserLevel =(Integer)request.getSession(true).getAttribute("userRole");
if (nUserLevel.intValue() < nLevel.intValue())
return false;
return true;
%>
i'm getting an error:
HttpServletRequest cannot be resolved to a type
What to do?

import the following package...
import javax.servlet.http.HttpServletRequest

My class cannot be resolved to a type

I just installed jstl and I am trying to get it work using this test code. The class Customer is in WEB-INF/classes, an ArrayList of Customer objects is stored in the session in the attribute "results". Any ideas why this is failing?
<base href="<%= request.getScheme() +"://" + request.getServerName() + (request.getServerPort() != 80 ? ":" + request.getServerPort() : "") + request.getRequestURI() %> "/>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="java.util.Collection,
                 java.util.ArrayList"%>
<%@ taglib prefix="h" tagdir="/WEB-INF/tags" %>
<jsp:useBean id="customer" class="Customer" />
<jsp:useBean id="results" scope="session" class="java.util.ArrayList" />
<table>
<c:forEach items="${customer.results}" var="item">
<tr>
     <td><c:out value="${item.id}"/></td>
     <td><c:out value="${item.name}"/></td>
</tr>
</c:forEach>
</table>Here is the error I'm getting:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     Search.doPost(Search.java:95)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
An error occurred at line: 8 in the jsp file: /listCustomers.jsp
Generated servlet error:
Customer cannot be resolved to a type
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:413)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     Search.doPost(Search.java:95)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.16 logs.

I added this line to my class:
package storePackage;and put the compiled class in: WEB-INF/classes/storePackage/
Then I changed my jsp to:
<base href="<%= request.getScheme() +"://" + request.getServerName() + (request.getServerPort() != 80 ? ":" + request.getServerPort() : "") + request.getRequestURI() %> "/>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="java.util.Collection,
                 java.util.ArrayList"%>
<%@ taglib prefix="h" tagdir="/WEB-INF/tags" %>
<c:set var="customer" value="<%= new Customer() %>"/>
<jsp:useBean id="customer" class="com.storePackage.Customer" />
<jsp:useBean id="results" scope="session" class="java.util.ArrayList" />
<table>
<c:forEach items="${customer.results}" var="item">
<tr>
     <td><c :o ut value="${item.id}"/></td>
     <td><c :o ut value="${item.name}"/></td>
</tr>
</c:forEach>
</table>Now I'm getting this:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /listCustomers.jsp(9,0) The value for the useBean class attribute com.CustomerPackage.Customer is invalid.
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     Search.doPost(Search.java:95)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
org.apache.jasper.JasperException: /listCustomers.jsp(9,0) The value for the useBean class attribute com.CustomerPackage.Customer is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:146)
     org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1174)
     org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
     org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
     org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
     org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
     org.apache.jasper.compiler.Generator.generate(Generator.java:3304)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
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     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     Search.doPost(Search.java:95)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.16 logs.

JspWriter cannot be resolved to a type

The following is CheckAddress.jsp page which checks if the form has the name and phone fields filled in or not. If not then it must print the errors. But the problem I am having is that the Eclipse is showing me the error "JspWriter cannot be resolved to a type".
If I ignore this error and run the page in the j2ee preview server in eclipse than I get the following error:
>
Unable to compile class for JSP
An error occurred at line: 22 in the jsp file: /CheckAddress.jsp
Generated servlet error:
The method prinln(String) is undefined for the type JspWriter
An error occurred at line: 22 in the jsp file: /CheckAddress.jsp
Generated servlet error:
The method prinln(String) is undefined for the type JspWriter
An error occurred at line: 22 in the jsp file: /CheckAddress.jsp
Generated servlet error:
The method prinln(String) is undefined for the type JspWriter
Caused by:
org.apache.jasper.JasperException: Unable to compile class for JSP
>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<%--Provide Directives to inform JSP of packages needed--%>
<%@page language="java" import="java.util.*"%>
<%@page language="java" import="java.io.*"%>
<%--Specify JSTL tag library for use --%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<meta http-equiv="Content-Type" content="text/html; charaset=ISO-8859-1">
<title>Check Address</title>
</head>
<body>
<%--Declare the java bean for the addresslist to be queried --%>
     <jsp:useBean id="dbab" class="addressBean.DBAddressBean" />
<%--Use JSP scripting elements to define two methods --%>
<%!
     List<String> checkAddress(String Name, String Phone){
      List<String> errors = new ArrayList<String>();
      if((Name == null) || (Name.equals(""))){
           errors.add("Name must not be blank");
      if((Phone == null)||(Phone.equals(""))){
           errors.add("Phone must not be blank");
      return errors;
     void printErrors(JspWriter out, List<String> errors) throws IOException{
          //Report the errors
          out.prinln("<p class=\"error1\">The following errors occured: <br />");
          out.prinln("<ul>");
          Iterator<String> i = errors.iterator();
          while(i.hasNext()){
               out.println("<li type=\"disc\">"+i.next()+"</li>");
          out.prinln("</ul></p><p><b>please try again</b></p><br />");
%>
<%--Use the internal Scriptlet to call an internal method and get the request parameters with the form info--%>
<%
     List<String> errors = checkAddress(request.getParameter("Name"), request.getParameter("Phone"));
%>
<%--Use JSTL tags to get the values of the parameters for all of the form info --%>
     <c:set var="aid" value="${param.aid}"/>
     <c:set var="Name" value="${param.Name}"/>
     <c:set var="Street" value="${param.Street}"/>
     <c:set var="City" value="${param.City}"/>
     <c:set var="State" value="${param.State}"/>
     <c:set var="Zip" value="${param.Zip}"/>
     <c:set var="Phone" value="${param.Phone}"/>
<%--Use JSP elements to set the values in the Java Beans--%>
     <jsp:setProperty name="dbab" property="id" value="${aid}"/>
     <jsp:setProperty name="dbab" property="name" value="${Name}"/>
     <jsp:setProperty name="dbab" property="street" value="${Street}"/>
     <jsp:setProperty name="dbab" property="city" value="${City}"/>
     <jsp:setProperty name="dbab" property="state" value="${State}"/>
     <jsp:setProperty name="dbab" property="zip" value="${Zip}"/>
     <jsp:setProperty name="dbab" property="phone" value="${Phone}"/>
<%--Use the scriptlet to determine where to go now --%>
<%--Notice how the JSP element tag is used within the scriptlet, the scriptlet needs to be "closed" and "reopened"--%>
<%
     if(errors.size()==0){
          dbab.saveChanges();
          response.sendRedirect("AddressList.jsp");
     }else{
          //print errors
          printErrors(out, errors);
%>
     <jsp:include page="EditAddress.jsp"/>
<%
%>
</body>
Edited by: blinkaj on Apr 18, 2010 2:15 AM

Thanks elOpalo, even though eclipse is still showing the error, things are running fine after I rectified my typing mistake about the prinln. :)

I am getting this error - JspFormsSession cannot be resolved to a type

Hi
I am getting following error when I try to open a jsp file.
Any solution?
JSP line details are -
JspFormsSession openrules_session = (JspFormsSession) session.getAttribute(s_attr);
Error is -
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 4 in the jsp file: /index.jsp
Generated servlet error:
JspFormsSession cannot be resolved to a type
An error occurred at line: 4 in the jsp file: /index.jsp
Generated servlet error:
JspFormsSession cannot be resolved to a type
An error occurred at line: 4 in the jsp file: /index.jsp
Generated servlet error:
JspFormsSession cannot be resolved to a type
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Now I am confident that the problem is with library including, as the same thing happens with other libraries.
I found that such a warning appears every time:
Classpath entry /jspbook/src/lib/mail.jar will not be exported or published. Runtime ClassNotFoundExceptions may result.Unfortunately, I've no idea how to include this in a proper way. I think that setting it in "Add External JARs" in "Java Build Path" is enough... or not?
Seems we're close to solve the problem. May be this screen shot will be helpful to determine the problem?
http://img257.imageshack.us/img257/3967/screenshotjavaeejspbook.png
You can see that libraries are included in the Project Explorer

What is cannot be resolved to a type error?

When i run jsp programs, am getting :
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 6 in the jsp file: /dbcoffee.jsp
Generated servlet error:
CoffeeQBean cannot be resolved to a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
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     org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
what does cannot be resolved to a type mean?

I am getting the same error but while creating a Web Service.
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     _serviceClient cannot be resolved
     org.apache cannot be resolved to a type
     _service cannot be resolved
     _serviceClient cannot be resolved
     _serviceClient cannot be resolved
     org.apache cannot be resolved to a type
     _serviceClient cannot be resolved
     _serviceClient cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     The constructor TemperatureConverterStub(null, String) is undefined
     org.apache cannot be resolved to a type
     _serviceClient cannot be resolved
     _operations cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     _serviceClient cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     org.apache cannot be resolved to a type
     at ws.example.TemperatureConverterStub.<init>(TemperatureConverterStub.java:17)
     at ws.example.TemperatureConverterServiceClient.main(TemperatureConverterServiceClient.java:8)If you want I can post the files too.

Some class that cannot be resolved to a type

Hello, I?m trying to use the[b] itext API for PDF creating from Java.
In order to do this you must include the package .jar in your classpath and import com.logawie.text.* in your java file. All this steps are obviusly, and work correctly, in JAVA, but i?m trying to develope a web application, using JSP.
Usually when I try to import a package from a JAR file that are allocated in the C:\j2sdk1.4.2_12\lib directory it doesn?t work. I solved this problem with some classes including it directly to the src.zip file. But with the itext package it doesn?t work, I don?t know if my solution is too bad, but with another classes it works, but with the itext package it says that all classes references "cannot be resolved to a type".
Anyone can help me? Thanks in advance.

when i try to depooy it then error comes
user cannot be resolved to a type
can any body help me
and tell me about classpath
//UserData.java
package user;
public class UserData {
String username;
String email;
int age;
public void setUsername( String value )
username = value;
public void setEmail( String value )
email = value;
public void setAge( int value )
age = value;
public String getUsername() { return username; }
public String getEmail() { return email; }
public int getAge() { return age; }
//GetName.jsp
<HTML>
<BODY>
<FORM METHOD=POST ACTION="SaveName.jsp">
What's your name? <INPUT TYPE=TEXT NAME=username SIZE=20><BR>
What's your e-mail address? <INPUT TYPE=TEXT NAME=email SIZE=20><BR>
What's your age? <INPUT TYPE=TEXT NAME=age SIZE=4>
<P><INPUT TYPE=SUBMIT>
</FORM>
</BODY>
</HTML>
//NextPage.jsp
<jsp:useBean id="user" class="user.UserData" scope="session"/>
<HTML>
<BODY>
You entered<BR>
Name: <%= user.getUsername() %><BR>
Email: <%= user.getEmail() %><BR>
Age: <%= user.getAge() %><BR>
</BODY>
</HTML>
//SaveName.jsp
<jsp:useBean id="user" class="user.UserData" scope="session"/>
<jsp:setProperty name="user" property="*"/>
<HTML>
<BODY>
Continue<font face="Arial"> </font>
</BODY>
</HTML>

Re: OracleDriver cannot be resolved to a type

I still have the same problem which was reported in the first post.
I tried all the changes mentioned above but doesn't help as I am totally new to jsp please suggest me a way out in detail.
An error occurred at line: 6 in the jsp file: /one.jsp
oracle.jdbc.driver.OracleDriver cannot be resolved to a type
<%
try{
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.145.2.142:1521:MESNEW","MESAPUSER", "mesdev");
String query1="Select OWNER,TABLE_NAME FROM ALL_TAB_PRIVS_MADE ";
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:468)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
Thanking you in advance.

1) you don't want to do that in a JSP
2) did you actually add the correct jars to the classpath of your web application? Because if you did, you'd not get this error.
That means adding it to the proper location in your WAR file, as you should have learned when you studied tutorials and books about web application development.

Eclipse "cannot be resolved to a type" and new .JAR lib - config prob?

I'm trying to make use of the Commons HttpClient library in a project being built in Eclipse (3.1). I have a sample program (PostXML) that runs into "cannot be resolved to a type" on the "HttpClient" object. I think the problem is that the JRE 1.4.2 (Mac OS-X) system library includes an earlier release (3.0.1) of the HttpClient, but some of the classes used by PostXML are in the 3.1rc of HttpClient. I've downloaded the newer release, created a user library, and modified the load order so I can see the user library above (i.e. loaded prior to?) the System JRE in the package browser. I can see the HttpClient.class in the Package browser. I have "import org.apache.commons.httpclient.methods.*;" in the head of the application (that took tweaking). Several of the HttpClient methods resolve correctly, but not the HttpClient object constructor itself. I am also finding I cannot simply import all the HttpClient methods, but must import each explicitly (?). Suggestions?

I have gotten the sample code to compile and run,
though I still have some confusion about needing the
explicit imports (as compared to a wildcard import).
In the end I believe my "cannot be resolved to a
type" error was due to dependencies within the
HttpClient library on the commons-codec library. Once
I downloaded and installed that, the samples started
working better. Still trying to understand the API,
but making progress.when downloading third-party libraries, check the download page to see if it has any further dependencies. apache libraries are notoriously dependent on other apache libraries
regarding the imports, it's not that there's a need for explicit imports, it's more that wildcard imports are a bad idea. explicit imports gives other people looking at your code a first clue as to what it does, and it also can serve as an indicator that your class is too big, if there are lots of imports. wildcards hide this from you. apart from that, it makes no difference to your code, and imports don't even exist at runtime so it affects how your code actually runs, not at all

Shape cannot be resolved to a type

Hi all,
For my current programming in eclipse 3.1.0, I'm using an open source class. Within that class, the object 'newShape' of class 'Shape' is declared. When compiling, the following error message occurs:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
     Only a type can be imported. java.awt resolves to a package
     Shape cannot be resolved to a type
     newShape cannot be resolved
want does that mean? Does anybody has an answer?
Thanks in advance,
Andreas

Hi DrLaszloJamf,
you were right I had 'import java.awt;' in my code. But even without it, the problem remains. Listed below are the critical codelines.
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.util.Enumeration;
import java.util.Vector;
public class CellGridCanvas extends Canvas {
private boolean cellUnderMouse;
private Image offScreenImage;
private Graphics offScreenGraphics;
private Image offScreenImageDrawed;
private Graphics offScreenGraphicsDrawed;
private int cellSize;
private CellGrid cellGrid;
private Vector listeners;
private int newCellSize;
private Shape newShape;
The error message 'Shape cannot be resolved to a type' refers to the last line, where object 'newShape' is declared.

JSP Object Cannot be resolved to a type

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