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can servlet have instance variables?
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Answer / rajashree
The servlet you write can be used simulataneously by many
users at the same time and each user of the servlet has a
thread. Consider the user and the session one and the same.
Avoid instance variables. An instance variable is any
object owned by a a class. There will be only one of these
per class - not one per user. In general, you can not have
a user modify an instance variable because other users are
also using the same variable.
| Is This Answer Correct ? | 35 Yes | 5 No |
Answer / unknown
Dear Soori and Shekhar ot post ur name here u answer YES if
u not know the right logic then why u post ur answers nways
thanks to Rajashree for the right answer
| Is This Answer Correct ? | 11 Yes | 4 No |
Answer / neeraj
Ravikiran.chd
If we implement single thread model then how servlet will
handle multiple request at a time??
So its better to avoid the use of instance variable.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / debapriya maity
Yeah we surely can provide instance variable,but ur servlet
implements MultithreadModel,its is not the right
approach,better use local varibles ,using SingleThreadModel
approach cause perfomance degradation
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / ramana
it is not recomended to use instance variables in servlet...if necessary use static variables..
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ravikiran.chd
yes and we can make them thread safe by implementing
SingleThreadModel
| Is This Answer Correct ? | 2 Yes | 2 No |
Hello, My project requirement is like I need to create a web page using MVC pattern. I hava a bean class, jsp page, servlet, service and dao. My jsp has two fields. One is dropdown list. The option values has to get populated from the database table. The other one is a text box and its value has to come from database table. As of now I have defined the fields in bean class, got the values from database using arraylists in dao class and I called this from service class. Can anyone please tell me the workflow of how the servlet will get this arraylist and populate the arraylist values as dropdown options in jsp page? Also I would like to know the role of bean class in MVC pattern? Thanks in advance!
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