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Javaranch mock exam question

 
Kedar Dravid
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Consider the following:

package com.javaranch;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class PostServlet extends HttpServlet
{
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>\n <body>\n");
out.println(" <h2>\n Hello World\n </h2>\n");
out.println(" </body>\n</html>\n");
out.flush();
out.close();
}
}

What is the result of compiling the above Servlet and accessing it by typing:
"http://www.javaranch.com/servlet/com.javaranch.PostServlet"
into the address field of a browser

Answers
The server will not find the Servlet due to an incorrect URL.
An error page is returned from the Server.
The browser displays "Hello World"
The code fails to compile.

Given answer:
The Servlet does not implement a doGet method so, an error is returned.

My question:
From what I understand, a servlet needs to implement either doGet or doPost.
In the above code, the doPost method is overridden.
So, why would the above code return an error?
 
Paul Bourdeaux
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A simple hyper link is always a GET request.

So by typing the address into the browser, you are sending a GET request. Since the servlet does not have a doGet method, an error is returned.
 
Bhumika Thakkar
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If we had overriden the doGet() then would the server throw an exception because of the URL?

Bhumika
 
Kejal Shah
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Well,
If the mapping is done properly in the DD, it'll work fine, else you'll receive a Page not found or a container specific message
 
Narendra Dhande
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Hi,

For the older versions of Tomcat, the URL is fine. But latest versions does not support such type of URLs.

Thanks
 
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