Solved

Object Deallocation

Posted on 2004-08-16
7
298 Views
Last Modified: 2010-08-05
HSSFWorkbook hsswb = new HSSFWorkbook();
    HSSFSheet sheet = hsswb.createSheet("Abstract collection report");


If i declare this type of object in JSP and do not deallocate them
what will be the effect..

Is it necessary to do it..
0
Comment
Question by:Ritug
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
7 Comments
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 11808668
You do not need to do that. Garbage collector will help you maintain unused instance of object.
It will cleanup automatically if there is no reference to that object.
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 11808702
In more detail about garbage collection.

Garbage collection is an mechanism that java virtual machine use for maintaining memory. The object that is not used anymore which JVM detect by check whether there is any reference to it or not. If not the container will decide to garbage that object from memory. We will not know when container(JVM) will decide to do that. Container start to do it by themselve.

Here is an example

String a="abc";  // this will create instance of string "abc" in memory and point or reference by variable a
a=null; // set a reference to null so "abc" instance can not refer to anymore
//container will clean "abc" later....


Regards,

0
 

Author Comment

by:Ritug
ID: 11809065
Thanks for assistance
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 11809075
Best of luck. :)
0
 
LVL 1

Expert Comment

by:umangjoshi
ID: 11809752
set it to null, rest will be handle by garbage collector.
0
 
LVL 11

Accepted Solution

by:
sompol_kiatkamolchai earned 500 total points
ID: 11810394
Please accept my answer if you feel your problem is over. :)
0
 
LVL 11

Expert Comment

by:sompol_kiatkamolchai
ID: 12003814
Thanks mate.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After seeing numerous questions for Dynamic Data Validation I notice that most have used Visual Basic to solve the problem. This suggestion is purely formula based and can be used in multiple rows.
This article is written by John Gates, CISSP. Gates, the SNUG President-Elect, currently holds the position of Manager of Information Systems at Lake Park High School in Roselle, Illinois.
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question