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Can we define constructor in Servlet class?
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Answer / santhosh kumar
Yes, we can define constructor in servlet.
| Is This Answer Correct ? | 28 Yes | 4 No |
Answer / naveen
yes we can create a constructor
by default JVM calls default constructor.In addition to that if write both default and parameterized constructor then JVM call default one and then parameterized one
hence the ans is yes we hav to write two constuctors
no if write our own constructor one itself
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / jayakrishna
init() is there what is the need of constructor.If is ther
who will call the constructor? servlet container will call
the init method
| Is This Answer Correct ? | 6 Yes | 4 No |
Answer / 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 |
Answer / komal singh adhikari
YES,
we can initialized the default constructor.
but we cannot call the parameterized one.
| Is This Answer Correct ? | 4 Yes | 4 No |
Answer / srikanth b
Yes, we can define constructor in Servlet class.
Constructor may be a Default Constructor or Parameterised
Constructor.
If we didn't write any constructor then the default
constructor will be executed. Because, to read init
parameters of a servlet we need servlet config object in the
life cycle of the servlet. Servlet config object object is
created after the execution of the constructor.
| Is This Answer Correct ? | 1 Yes | 3 No |
Answer / sanjeev kumar
We never can create the Servlet instance. hence there is no
chance of having constructor in servlets. Servlet life
cycle methods (init(), service(), destoy())are called by
the servlet container.
| Is This Answer Correct ? | 4 Yes | 8 No |
Answer / amit tomar
we can't define constructor in Servlet class
| Is This Answer Correct ? | 3 Yes | 14 No |
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