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Categories >> Software >> Java Related >> Java J2EE >> Servlets
 
 


 

 
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Question
Can we call destroy() method inside the init() method? What
happens when we do so?
 Question Submitted By :: Manub22
I also faced this Question!!     Rank Answer Posted By  
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 1
Yes you can call init method in destroy.
public void destroy(){
try {
init();
}
catch(Exception e){

}
}
 
Is This Answer Correct ?    11 Yes 25 No
Sunny
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 2
if suppose we take the servlet programming side then
whenever u type the URL first web browser call the service
method then create the servlet object then call the
init()method whenever we call the init method start the
proceesses of the particular object operation suppose we
call the destroy()method before completion of the particular
object operation servelet object is removed then when we r
call the service method then create the servelet object
 
Is This Answer Correct ?    11 Yes 9 No
Poorna Chandar Rao.yerrabothu
 
 
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 3
In the Servlet programming context, the destroy() method
can never be called by your code and is called by the
servlet container
 
Is This Answer Correct ?    18 Yes 4 No
Mani
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 4
In the servlet life cycle First our request calls to the
init()method,Inside it will doing some operations related
to the objects after that it will cal the destory() method
The destory()removes the servlet object,before calling to
service() method.
 
Is This Answer Correct ?    2 Yes 11 No
Srilatha
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 5
Yes you can call a destroy() method in init() method, but
remember destroy() method will behave like normal method
but not as life-cycle method.
 
Is This Answer Correct ?    4 Yes 2 No
Ashwin Kumar J
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 6
a call to the destroy method will happen and the resources
will be released and the flow will continue as it is and
will throw an exception if the released resource is used
indie the service method call.
 
Is This Answer Correct ?    2 Yes 1 No
Ravikiran
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 7
a call to the destroy method will happen and the resources
will be released and the flow will continue as it is and
will throw an exception if the released resource is used
indie the service method call.
 
Is This Answer Correct ?    2 Yes 0 No
Ravikiran
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 8
This action does not disturb the normal life cycle flow of the servlet. The servlet will work normal. You may test the below code.

/**
* @author Suraj
*
*/
public class TestServlet extends HttpServlet {


public void init(ServletConfig config)throws ServletException{
super.init(config);
destroy();
}

protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {

System.out.println("I am test servlet.");
}

}

Web.xml
--------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Servlet</display-name>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>com.esspl.TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
------------------------------------
Test URL: http://<HOST>:<PORT>/<Context>/TestServlet.do
 
Is This Answer Correct ?    7 Yes 3 No
Suraj Kumar
 
  Re: Can we call destroy() method inside the init() method? What happens when we do so?
Answer
# 9
One can call destroy method from init method. One scenario
in which you would like to call is some resource is looked
up once in init() method and cleaned in destroy() method. If
exception is thrown before it finishes as servlet is not
brought in service, container won't call destroy method. so
to keep resource clean you can call destroy() method from init()
 
Is This Answer Correct ?    3 Yes 0 No
Amitasite
[Asite Solutions]
 

 
 
 
Other Servlets Interview Questions
 
  Question Asked @ Answers
 
how to use servlets with j2ee ? Tech-Mahindra 2
what is OOAS iGate 2
what is servlet life cycle? Inforica 3
what is servlet and what you get when we use servlets? Satyam 7
Is classes folder is compulsory in web-inf/ even though u r deploying ur application with war file? Bosch 3
What are different types of SessionTracking?   2
What is a Proxy Server?   1
Which method the Servlet container call to create the instance of the servlet? emc2 16
Is Servlet Class Thread safe?????? How to make servlet Thread safe ??? Cognizent 4
What happens, when client requests for server object, which is not yet loaded into the memory?   2
What is session variable in servlets?   1
How to run a servlet program? Infosys 7
 
For more Servlets Interview Questions Click Here 
 
 
 
 
 


   
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