Hi Shunmuga,

based on my experience:
1) What are the advantages of wicket over Struts, Springs, Tapestry,
Stripes?

2) What is the main advantages of Wicket?
The frameworks you have listed are based on MVC frameworks. Wicket is a component oriented framework, like GWT or Vaadin. This kind of frameworks are pretty similar to desktop GUI frameworks like Swing, meaning that they and offer an object oriented abstraction of web entities like pages, forms, input components and so on. The difference between Wicket and MVC frameworks is well explained here:

https://cwiki.apache.org/WICKET/#Index-AboutWicket

3) Where the wicket can be used in real time scenario?

4) For which database it suits gud?
Wicket is database-agnostic. You can integrate it with your favorite ORM o JDBC framework.

5) Which framework is best on performance view?

6) Why wicket has to be used?

Wicket is ideal for pages with a complex behavior ( usually pages with some AJAX) and when you have to manage a lot of user data

Now i'm developing a web application project for feeding data&  generating
report for it. For feeding data, i have to give login for every users.
according  a scenario at a time multiple concurrent users ll feed data. For
this which java technology ll be more effective, powerful, efficient? which
framework s best for this?

another scenario is i have to ensure that one user can login at only one
system, he should login at another system on the same time. tat is one user
can have one sessin at one system at a time. he can login to another to
another system at a same time if he tries means an error should be thrown.
for this vat i've to do? can u offer some sample code?

Where EJB can be used? What is the difference in using EJB over frameworks
like Struts, Spring, Wicket, Tapestry, Stripes? Is it possible to use
frameworks with EJB?

Yes, you can use these framework with EJB specification. Obviously if you use Spring you are likely to use the whole framework instead of EJB
.

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