Zul Chewanabas

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since Mar 26, 2004
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Recent posts by Zul Chewanabas

Good morning,
A question regarding ear file. I am writing a separate application that uses/refer to a bunch of jar files (i.e. from an exploded test.ear file). Is it possible to use CLASSPATH to point to the test.ear file directly without exploding the ear files.

18 years ago
Hi guys,
I am getting this error while java was trying to decrypt some information. I have checked java.security file to make sure that it has the following entries:-
# List of providers and their preference orders (see above):

and it does. However, at runtime, it unable to find the provider. any clues? The following is the snippet of the exception.

Wrapped Exception: java.security.NoSuchAlgorithmException: Cannot find any provider supporting Blowfish/ECB/PKCS5Padding
at javax.crypto.Cipher.getInstance(DashoA6275)
18 years ago
"Out of clutter, find simplicity" ~ Einstein. thanks guys

here is related article - not really related to my batch job but more like for multiple accesses.


yes, the loop will be used in the implementation. I was looking towards designing it first, i.e loading 18000 into a loop at one time is probably not feasible - ryan answered that question with the pattern so I can chunk the data appropriately. thx
thank you Ryan. I will look into that pattern. I appreciate it!
Hi, A question regarding what pattern to use. I have about 18000 records that I need to validate and process before I can apply the business rules. I sure don't want to read 18000 records at one time but rather read them in chunks. is there any pattern out there that I can use. thank you.
thank you Jeanne. That makes a lot of sense now..so the container implements the abstract class at deployment time. thx
I noticed that for an entity bean class, it has to be declared abstract since we have to provide the virtual persistent field and map them to the column in the database. Then for encapsulation reason, we implement public getters and setters to return and set the values from outside the class.

If this is an abstract class, that means someone has to implement the concrete class since we have abstract methods, 'those virtual persistent fields', that need to be implemented. But according to the rule, we don 't have to implement those abstract getters/setters a.k.a. 'virtual persistent fields.' - we're supposed to leave them alone. This is really confusing.. can someone help me with this situation? thank you.
>the technical person doing the actual test if you're lucky to get one of >those
lol, yes I feel so lucky right now.

hi Kashif,
Thank you for ringing the bell. Believe it or not, you have answered my question. I guess I already have a big chunk of knowledge at hand.

I got the definition of J2EE from the sun website(as follows) :-
The primary technologies in the J2EE platform are: Java API for XML-Based RPC (JAX-RPC), JavaServer Pages, Java Servlets, Enterprise JavaBeans components, J2EE Connector Architecture, J2EE Management Model, J2EE Deployment API, Java Management Extensions (JMX), J2EE Authorization Contract for Containers, Java API for XML Registries (JAXR), Java Message Service (JMS), Java Naming and Directory Interface (JNDI), Java Transaction API (JTA), CORBA, and JDBC data access API.

Hmm.. let me see I have 3 more days to prepare...I should be ok.

thanks guys!
19 years ago
Hi Jeroen,
Thanks for the response. I have programmed in java for 5 years in my last job (not the current one) creating several architectures for 6 automated library jobs and multiple Ford jobs around the coutry - using regular java/jsp/servlets etc to control cranes, conveyors, and automated guided vehicles. They know that I don't have J2EE experience - that has been cleared.

But due to my 'inactive' duty in Java for 8 months, they want to test me to make sure that my java skills are 'tip-top'. I am secure enough with my credentials that I will not make up stories.

All the OO concepts and Java specific knowledge have come back strongly. I am currently refreshing my knowledge on J2EE. I just want to get some ideas what kinds of questions they usually ask; design patterns etc.

thank you
19 years ago
Hi guys,
I have been out of java for nearly 8 months now doing Project mgmt works. I am trying to get back to programmming now. I have passed the java technical interview that put me in the mid-level java position - in short I have secured the job as a java developer. However, they want me to interview for a senior position doing j2EE. I have 2 certifications; java programmer and EJB.

My question:
What kinds of j2ee questions should I focus on the most for J2EE interview? I have been reading a lot of design patterns but I know there are core concepts that I need to re-grasp. Any helps are appreciated.

have a nice day,
19 years ago
>Sometimes, I think that my honesty hurts me during the first round of >screening. What I mean "first round" is when I am asked the number of years >of experience I have. How do I handle the situation?
Don't ever lie in your interview! What you need to do is to add some 'paddings' to your answer. You could say,"Although I only have 2 years of experience and the job requires 5 years, I can prove to you that I have the same amount of experience in, i.e. java etc. This is due to the fact that I am a fast learner....'
Then you need to convince the interviewer to validate your claim, that you are a fast learner. Bring some sample works etc.
My point is, to every interview question, DO NOT say NO or any sentences that have negative implications. ALways express yourself using positive words. Employers like it when you show a lot of enthusiasm, followed by some great examples from your professional life.
good luck
20 years ago
beyond certifications, you have to know people nowadays. Networking is the name of the game. HR departments are overwhelmed with the amount of resumes they receive over the web. That alone will decrease the chances of you getting a job no matter how good you are.
However, if you know someone , and he knows someone...they you probably have a better chance of getting the job. Word-of-mouth is great in this situation.
20 years ago