Session creation

When is a session created ?

What would be the result of request.getSession(false);
if this is the first request to this page and to the web application too.

Would a session be already created ? else it should return null ?

Please elaborate.

Thanks in advance

Hi,
A session is created when you create it.
HttpSession sess = request.getSession().
This is the line that creates the session.
With regards,
Padma priya N.G.

Hi,
request.getSession(false) will return null.
With regards,
Padma priya N.G.

Thanks for your help. However, my question is in context to the following question from a mock exam

8.Consider the following JSP code (See exhibit).What will it print for the very first request to this page as well as the web application that contains this page?
<html>
<body>
<% Integer count = (Integer) request.getSession(false).getAttribute("count");
if(count != null )
{ out.println(count); }
else
request.getSession(false).setAttribute("count", new Integer(1));%>
Hello!
</body>
</html>
Select 1 correct option.
A.It will print Hello!
B.It will print Hello and will set the count attribute in the session.
C.It will throw a NullPointerException at request time.
D.It will not compile.
ANS : B
If the session returns null then the answer should be C here. Any explainations ?

request.getSession(false) will return a session if there is any session associated with the requested, if not it will return null.

request.getSession() will create a session if there is no session associated with the request. request.getSession() is same as request.getSessin(true)

Swati said:
Thanks for your help. However, my question is in context to the following question from a mock exam

8.Consider the following JSP code (See exhibit).What will it print for the very first request to this page as well as the web application that contains this page?
<html>
<body>
<% Integer count = (Integer) request.getSession(false).getAttribute("count");
if(count != null )
{ out.println(count); }
else
request.getSession(false).setAttribute("count", new Integer(1));%>
Hello!
</body>
</html>
Select 1 correct option.
A.It will print Hello!
B.It will print Hello and will set the count attribute in the session.
C.It will throw a NullPointerException at request time.
D.It will not compile.
ANS : B
If the session returns null then the answer should be C here. Any explainations ?

Hi swati, in a JSP you have the implicit session variable available with you. So by the time you execute the statement "request.getSession(false).getAttribute("count");" you already have the session created. Note that there is no page directive
<%@ page session="false" %> as well. So session is available in JSP by default. If you put the above directive in the page then your answer is correct.

To get a clear idea see the java code generated for this jsp by the container.

Hope its clear for you now

Thank you Amol, thats the answer I was looking for .