Question

"Cannot be resolved to a type"

Asked by: jpking72

I'm trying to create a web app with Eclipse, but when I create the servlet, I get the error "Cannot be resolved to a type" everywhere. For HttpServletRequest, HttpServletResponse, javax.servlet, etc.  What is the problem?

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * Servlet implementation class for Servlet: Acceptinfo
 *
 */
 public class Acceptinfo extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
   static final long serialVersionUID = 1L;
   
    /* (non-Java-doc)
       * @see javax.servlet.http.HttpServlet#HttpServlet()
       */
      public Acceptinfo() {
            super();
      }         
      
      
      
      /* (non-Java-doc)
       * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
       */
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            response.setContentType("text/html");
            PrintWriter out = response.getWriter();
            out.println("<HTML><HEAD><TITLE>Hello Client!</TITLE>"+
            "</HEAD><BODY>Hello Client!</BODY></HTML>");
            out.close();
      }        
      
      /* (non-Java-doc)
       * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
       */
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
             doGet(request, response);
      }                    
}

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Asked On
2007-09-23 at 18:34:33ID22847477
Tags

resolved

,

cannot

,

type

Topics

Java Servlets

,

Java Programming Language

Participating Experts
4
Points
400
Comments
8

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Answers

 

by: malfunction84Posted on 2007-09-23 at 19:27:37ID: 19946235

Those classes don't come with the JRE, so you need to include the Java EE jars in your project.  Specifically, you want servlet-api.jar, which you can get from here:

http://www.mtholyoke.edu/courses/srollins/cs341-s04/web/servlet-api.jar

 

by: ThangamanirPosted on 2007-09-23 at 19:31:20ID: 19946255

Please see the link below

http://dev.eclipse.org/newslists/news.eclipse.webtools/msg12698.html

Can you post the error message that you are getting?

 

by: jpking72Posted on 2007-09-23 at 19:45:21ID: 19946325

the error message is "cannot be resolved to a type". where do i put the servlet-api.jar once i download it?

 

by: Ajay-SinghPosted on 2007-09-23 at 20:13:01ID: 19946378

In the classspath

 

by: jpking72Posted on 2007-09-23 at 20:35:36ID: 19946426

ok my classpath wasn't set, but i set it and it still isn't working

 

by: Ajay-SinghPosted on 2007-09-23 at 21:38:36ID: 19946563

How are you compiling it? whats the command line arguments?

 

by: objectsPosted on 2007-09-24 at 02:16:54ID: 19947144

add the jar to your projects build path

 

by: malfunction84Posted on 2007-09-24 at 05:39:48ID: 19947856

I would recommend creating a user library (so you can use it later) and then adding that library to your project.

Create a User Library:
- Go to "Window" > "Preferences..."
- In the menu on the left, expand "Java" > "Build Path" > "User Libraries."
- Click "New..."
- Type something meaningful, like "J2EE 1.4" but do NOT check "System library."
- Select the newly-created library and click "Add JARs..."
- Browse to where you put the servlet-api.jar file, select it, and click "Open."
- If you have jsp-api.jar, add it to this library as well.
- Click "OK."

Adding it to Your Project:
- Right-click on your project folder and select "Properties."
- In the menu on the left, select "Java Build Path."
- Click the "Libraries" tab.
- Click "Add Library..."
- Select "User Library" and click "Next >."
- Check the box next to the library you created previously and click "Finish."

20120131-EE-VQP-002

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