Interested to Buy Any Domain ? << Click Here >> for more details...
Can we write a constructor for a Servlet class ? if yes how ?
if no why not ?
- 10 Answers
- 19468 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
yes, we can write constructor on our own but it should be
no argument public constructor only, cause container will
create the object so it needs no argument constructor.
| Is This Answer Correct ? | 22 Yes | 1 No |
Answer / abhishek taneja
yes offcourse you can write a constructor for a servlet
after all it is a java class. you can simply provide but if
u do not provide then it is by default include the no
argument constructor that is used by the Init() method in
the servlet life cycle.
| Is This Answer Correct ? | 11 Yes | 0 No |
Answer / tharun raj
yes, we can provide a constructor in servlet calss..
Webcontainer uses the similar code shown below for creating
servlet object for our servlet class
Class c=Class.forName("OurServlet");
Object o=c.newInstance();
this newInstance() method uses zero argument constructor
while creating object..
| Is This Answer Correct ? | 10 Yes | 0 No |
Answer / chandra
constructor required, but it should be public no-argument
constructor. even though if you are not write that
constructor java compiler will create that construtctor by
default. for that your servlet class should be public other
wise you will get RuntimeWxception saying RequestedResource
is not available like that.
| Is This Answer Correct ? | 9 Yes | 2 No |
Answer / n.l.narayana
yes., when ever the servlet is executed .,it requires
configuration.,the configuration should be done in init()
method only.,
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / saikiran
that is one of the specification rule that
1.instantiated by constructior with no argument.
2.implementd class should be public and non-abstract.
3.should be implemnt javax.servlet.Servlet
We can Write it
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / narayana rao dasari
yes.....! we can write constructor for servlet class why
because every java class allows construction initialization
if we do not write constructor explicitly it will call
default constructior.
If we call our own constructiors means we will not able to
access the servelet config objects so better wat is to
intializeing in init() method......thank u,
Narayan
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ravikiran
we cann't write a constructor because the servlet container
will create the instance of the servlet by calling the
no-arg constructor
| Is This Answer Correct ? | 1 Yes | 8 No |
Answer / ravi
No..not at all,,,,servlet is a class which is dynamically
loaded...dynamically loaded class never requires
constructors.
| Is This Answer Correct ? | 8 Yes | 18 No |
can it possible to validate form field before execution of a servlet service method if yes how??
What do you mean by web applications?
What is the difference between callling a RequestDispatcher using ServletRequest and ServletContext?
What are the difference between RMI and Servlets?
I have a requirement Here we have a ResultSet object that will contain 50 records i need to print those recors in to a webpage(i.e; view according to MVC architectures that mybe servlet or jsp) . Here i need to print the records 10 per page that is 1 to 10 in page one and 11 to 20 in page two like remaining will be appeared in other pages we need to display those page numbers whenever we click on that page number we will go to that page and display 10 records like we will display 5 pages it is like this << 1 2 3 4 5 next >>
what is the difference between servlets and struts?
What’s the use of the servlet wrapper classes??
when you comppile the servlet is it neccesary to restaet the tomcat server?
How to deal with multi-valued parameters in a servlet?
List the Different types of servlet?
What is the difference between portlet and servlet?
What are the functions of Servlet container?
Core Java 
