• Post Reply Bookmark Topic Watch Topic
  • New Topic

Null pointer exception ?

 
Anonymous
Ranch Hand
Posts: 18944
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi all!,
I am using a servlet which simply
checks whether the session is
new.. if it is new, then send it to another page using redirect()
this is the error which it is showing
*************
Document moved
This document has moved here.
Error: 500
Location: /netzone/addfrm
Internal Servlet Error:
java.lang.NullPointerException
at horse.addfrm.doGet(addfrm.java:36)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559)
at ngasi.a.a.n.a(Unknown Source)
at ezj.b.e.run(Unknown Source)
 
Frank Carver
Sheriff
Posts: 6920
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It's hard to tell without seeing the code for your "addfrm" class. I know the problem occurs at line 36, though!
Could you post the doGet method, and any others it calls so we can have a look? Don't forget to put code examples iside UBB CODE tags (for details, see the "UBB Code is ON" link to the left when you create a message).
 
Rama Chandra
Greenhorn
Posts: 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The reason for nullPointerException may be due to calling a method on null session object.

You may be checking session.isNew() on a null session object.
Firt you check weather it in null or nor and then check weather it is new or old.
 
bhawna
Greenhorn
Posts: 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
hi,
to solve your problem
put the null pointer exception in throws clause.
 
What are you doing? You are supposed to be reading this tiny ad!
the new thread boost feature brings a LOT of attention to your favorite threads
https://coderanch.com/t/674455/Thread-Boost-feature
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!