Interested to Buy Any Domain ? << Click Here >> for more details...
Can we define constructor in Servlet class?
- 10 Answers
- 22269 Views
- Accenture, Yugma, I also Faced
- E-Mail Answers
Answer Posted / karnakar thallapalli
we can create default constructor and parameterised constructor.my servlet will anyways run and works fine.this question basically test our knowledge on servlet life cycle and how the container instantiate our servlet.but in real time i never recomend this .u may still use this concept in very exceptional cases.
below code
package com.oracle.scwcdtest;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public MyServlet() {
super();
System.out.println("in default constructor");
}
public MyServlet(String test) {
super();
System.out.println("param constructor");
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
}
}
| Is This Answer Correct ? | 4 Yes | 2 No |
Post New Answer View All Answers
How to get the server information in a servlet?
Differentiate between get and post?
What are different ways for authentication of servlet?
What do you mean by httpservlet?
what is servlet chaining?
What is a java servlet?
What is the difference between Difference between doGet() and doPost()?
Explain servlet events?
Tell us something about servletcontext interface.
What is the difference between sendredirect() and forward() in a servlet?
What is the GenericServlet class?
What is called Scriptlet?
Does servlet have main method?
What do you mean by a filter and how does it work?
What is the difference between servlet and filter?
