Problem compiling HelloWorld servlet

Hello,
I'm trying to compile a "Hello World" servlet in Tomcat that I copied straight out of the book. The code is as follows:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body>");
out.println("<head>");
out.println("<title>Hello World!</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Hello World!</h1>");
out.println("</body>");
out.println("</html>");
However, neither HttpServlet, HttpServletRequest, HttpServletResponse, or ServletException are being recognized. In each case, the message I'm getting from the compiler is "cannot resolve symbol." I'm finding this whole situation very distressing. If someone could help me out, I'd greatly appreciate it.
Thanks,
Adam

well i have tried out both Servlets and JSPs in Windows 98 and i did not get the problem you have mentioned, i am using Jakarta Tomcat 3.2.1, and i have set the classpath to servlet.jar, actually this file is present within the jakarta-tomcat-3.2.1\lib directory and i suppose the classpath is automatically set as u run the startup.bat file. What you can try is, while setting the TOMCAT_HOME and ANT_HOME in the autoexec.bat, try doing it using the old dos 8.3 file naming style, for eg.
set JAVA_HOME=C:\jdk1.3
set TOMCAT_HOME=c:\jakart~1.1
set ANT_HOME=c:\jakart~1.1
then try running the example again.

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Problems compiling a servlet

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You need to get J2EE (Java 2 Enterprise Edition). Download it and install it. It's basically a couple of JAR files that you need to use. Under $J2EE_HOME/lib there is a file called J2EE.jar Include that JAR file into your project and carry on with your servlet development.

Problem compiling simple servlet

I am trying to compile a very simple servlet.
When I do, I get the following error message:
Package javax.servlet does not exist
I am using the Java 2 SDK, Standard Edition Version 1.3.1.
I have downloaded the servlet api (zip file servletapi2_1_1win.zip)
from Sun's site. I unzipped these files in my lib directory; there are two folders,
one called api and the other called src. Api and Src directories have their own
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I am using W2K ; I had to create a CLASSPATH system variable in the environment
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I added the following line:
C:\jdk1.3.1_01\lib\api\javax\servlet;C:\jdk1.3.1_01\lib\api\javax\servlet\http;
I also did this for the PATH statement..
My servlet looks like this:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class howdy extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<HTML>");
out.println("<HEAD><TITLE>Hello World </TITLE></HEAD>");
out.println("<BODY>");
out.println("<BIG>Hello World </BIG>");
out.println("</BODY></HTML>");

Thanks. I was able to figure it out by specifying the
full classpath
at the command line, like this:
C:> javac -classpath
C:\jdk1.3.1_01\lib\servletapi2_1_1-win.zip\MyServlet.ja
a
Apparantly the system doesn't acknowledge the
environmental variable that
I created in the control panel; also I have no
autoexec.bat file...so it
looks like I have to write out the full path whenever
I need to compile
something. Kind of bothersome, but at least it
works.
You shouldn't have to do this. What operating system are you using?
If you are using win2000, winNT or winxp, you should set the classpath in your system environment varialbes. You can also make a config.bat file and put everything in there. Then just run this config.bat file to set up your environment once for every session.
Here's a file that I have set up on one of our NT machines. I just double click the icon for this file on my shortcut, and it gives me the window where I can compile my java programs.
Hope this helps.
Kamran
=========== File SetJava.bat ============
set PATH=%PATH%;m:\jdk1.3\bin
set CLASSPATH=m:\jdk1.3\jre\lib;m:\jdk1.3\jaxp-1.1\jaxp.jar;m:\jdk1.3\jaxp-1.1\crimson.jar;m:\jdk1.3\jaxp-1.1\xalan.jar;.
cd cis235
%SystemRoot%\system32\cmd.exe

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Am I doing something wrong or am I missing something from my configuration.
Marijan Madunic
package chapter2;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.TagSupport;
public class HelloTag extends TagSupport
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// Method called when the closing hello tag is encountered
public int doEndTag() throws JspException {
try {
// We use the pageContext to get a Writer
// We then print the text string Hello
pageContext.getOut().print("Hello");
catch (Exception e) {
throw new JspTagException(e.getMessage());
// We want to return SKIP_BODY because this Tag does not support
// a Tag Body
return SKIP_BODY;
public void release() {
// Call the parent's release to release any resources
// used by the parent tag.
// This is just good practice for when you start creating
// hierarchies of tags.
super.release();
D:\Java\JDK 1.3\bin>javac HelloTag.java
HelloTag.java:3: cannot resolve symbol
symbol : class JspException
location: package jsp
import javax.servlet.jsp.JspException;
^
HelloTag.java:4: cannot resolve symbol
symbol : class JspTagException
location: package jsp
import javax.servlet.jsp.JspTagException;
^
HelloTag.java:5: cannot resolve symbol
symbol : class TagSupport
location: package tagext
import javax.servlet.jsp.tagext.TagSupport;
^
HelloTag.java:7: cannot resolve symbol
symbol : class TagSupport
location: class chapter2.HelloTag
public class HelloTag extends TagSupport
^
HelloTag.java:14: cannot resolve symbol
symbol : class JspException
location: class chapter2.HelloTag
public int doEndTag() throws JspException {
^
HelloTag.java:20: cannot resolve symbol
symbol : variable pageContext
location: class chapter2.HelloTag
pageContext.getOut().print("Hello");
^
HelloTag.java:24: cannot resolve symbol
symbol : class JspTagException
location: class chapter2.HelloTag
throw new JspTagException(e.getMessage());
^
HelloTag.java:28: cannot resolve symbol
symbol : variable SKIP_BODY
location: class chapter2.HelloTag
return SKIP_BODY;
^
HelloTag.java:37: cannot resolve symbol
symbol : variable super
location: class chapter2.HelloTag
super.release();
^
9 errors

Well, it looks like you've not got the servlet development kit JAR on your classpath. I think it'll probably be called servlet.jar on your system. Add that to the classpath if it's not already there.
Incidentally, you've bumped into one of the areas Java's slightly lenient - declaring a method that looks like a constructor:
public HelloTag() { }
public void HelloTag() { }The first is a constructor, the second is a normal method. I'm assuming you intended to have the former instead of the latter.
Anyway, hope this helps.

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http://java.sun.com/j2ee/sdk_1.3/

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Hi, i have a problem to compile a servlet, i will try to explain my problem easily...
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^
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symbol : class BeanRicercaUtente
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C:\Programmi\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\WEB-INF\classes>
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import javax.servlet.http.*;
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i am sorry, but in the first class i have not written "import JavaBean.BeanRicercaUtente;"
i have only these imports...
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;

I have a problem compiling servlets bymeans of NetBeans IDE 3.6.

If I compile a servlet by means of another IDE, they are oK and work well with NetBeans too.
On the contrary, if I compile it bymeans of Netbeans 3.6, I get a .class which does not work. I
have realized also that for instance if the .class i get with the other IDE is 1,58 KB, if I use
NetBeans I get a .class smaller, that is 1,53 Kb.
Can you help me?
Thanks
Eugenia Mariani

ok
This is the servlet named Contatore.java
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Contatore extends HttpServlet
private int conta;
public void init(ServletConfig config) throws ServletException
conta = 0;
public void doGet(HttpServletRequest richiesta, HttpServletResponse risposta)
throws IOException, ServletException
conta++;
risposta.setContentType("text/html");
PrintWriter out = risposta.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Pagina con contatore</title>");
out.println("</head>");
out.println("<body>");
out.println("Questa pagina e' stata visualizzata");
out.println("<h1>"+conta+ "</h1> volte.");
out.println("</body>");
out.println("</html>");
out.close();
Before using the compiler of NetBeans (that is after getting Contatore.class by means of Bluej) when I use Execute I see in Internet Explorer 6.0 with win Xp Pro at the
http://localhost:8084/esempi/Contatore
Questa pagina e' stata visualizzata
1
volte.
and Contatore.class is 1,58 KB
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I see in Internet Explorer 6.0 with win Xp Pro at the
http://localhost:8084/esempi/Contatore
HTTP Status 404 - Servlet Contatore is not available
type Status report
message Servlet Contatore is not available
description The requested resource (Servlet Contatore is not available) is not available.
Apache Tomcat/5.0.19
and Contatore.class is 1,53 KB
I hope to have said everything
I wait a help, please.
Thanks

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Using Windows & Sun Java System Application Server Platform Edition 9.0_01
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-- Ashish.

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