Bhairava Surya

Thanks

Thanks one and all for your quick responses.

@All,

If we have Integer pool similar to String pool. Can someone explain how it works?

Also, I read the references shared here. After that also same question why only String class immutable. What are the specific advantages that we are getting with this.

Hi All,

It could be the simple question.

But I would like to understand why only String class is immutable. I looked into many forums, but not clear about it.

1. Why String class is immutable? What is the main reason for making String class as immutable.
2. Why there is no int pool or float pool or Integer pool etc, why only String pool


Thanks,

Hi All,

This is related to logging system.

Not sure in whcih forum to ask this. So asking here.

How can we design a proper logging system. Consider if I have multiple components and all are logging into the same log file.

Hi All,

I have one basic query, which sorting is better whether code level sorting or database(sql) level sorting?

Thanks & Regards,

Hi All,

Can someone explain what is meant by downstream(& upstream) application?

Thanks.

Can someone provide me howto upload a file in weblogic portal?
Some code will be useful. consider this is with JSP, servelts.

Thanks

Hi All,

Can we upload a file of size 250MB in weblogic portal environment.
If so could you please send me the details of it.

Thanks & Regards,
Ravi.

Hi all,

I want to learn weblogicportal. So can someone tell me the starting point for that.
What softwares do I nee dto download and how to proceed further??
any good links for that??

Thanks & Regards,
Ravi.

Hi All,

I am new to portal development.
Can someone help in understanding difference b/w portal vs portlet???

Thanks & Regards,
Ravi.

Hi All,

Consider I have a class which extends hashset. I have over-ridden the methods equals() and hashcode().
In unit testing do we need to unit test the equals()/hashcode() or put/get methods??

Thanks & Regards.
Ravi.

Hi All,

I am new to Spring concepts. As I read IOC, I am confused what wrong with Factory Pattern that we are going for this IOC Pattern(hope this is also a pattern).

Please provide some basic examples for IOC/DI/Factory Pattern with their differences.

Thanks & Regards,
Ravi.

Hi All,

I am new to Log4J. While searching over net I got the below doubts.

1) Why there are multiple levels in log4j, I mean DEBUG, INFO etc? When I need to a specific one?
2) Consider INFO is for information, if any of my code wher I need to use logger.info(). But I used logger.debug().So system will throw any exception?
3) what is log4j.properties file? explain the code inside that
4) how to configure log4j with tomcat. how to switch on or off??


Please clarify my doubts.

Thanks & Regards,
Ravi.

Hi All,

Can someone explain me why Sping? (I have gone through so many online tutorials but not happy)
when we should use this??
In a J2EE application at what tiers/levels we can use this??

Thanks & Regards,
Ravi.

Hi All,

I started learning Hibernate, but I didn't understand why hibernate?
I have gone through so many tutorials over net, but I am not satified with anyone of the answers.

1) Just please help in understanding why hibernate with some basic examples which we cant do using JDBC
2) Before hiberante how are we achieving ORM.
3) whats the problem with normal JDBC/SQL.
4) What are the other tools/applications which are similar to hibernate

Thanks & Regards,
Ravi.