Start to learn J2EE

Hi, I want to learn J2EE. Would someone advise me where should I start? I had been doing Java, Struts, Servlet and JSP for a few years. Thanks.

stonegrass wrote:
Hi, I want to learn J2EE. Would someone advise me where should I start? http://java.sun.com/j2ee/1.4/docs/tutorial/doc/
I had been doing Java, Struts, Servlet and JSP for a few years. Thanks.Sounds like you've already started doing J2EE then :)

Similar Messages

Hi i want tp start learning j2ee can anyone suggest any book or site for th

hi ,
i am MCA final year student i wana start learning j2ee can anyone suggest any site or book for that.
i know JSP n wana learn the remaining technologies in j2ee.
what all does come under j2ee.plzz help.

Hi Vikas,
This sun site contains all the information u need to get started in becoming the best J2EE programmer.
just browse under technologies...> J2EE (Enterprise Edition) there u'll see a lot of tutorials covering the J2EE platform..such as Web Services, portals...jsp, servlets, xml, xsl, JAPX, javabeans..e.t.c too many to mention.
Also there are other sites that can put u on the run try IBM..it has good resources for J2EE programmers www.ibm.com/developerworks or http://www-106.ibm.com/developerworks/ .
or simply open up google and type "Learning J2EE" or "Understanding J2EE" and what u'll get will stun you.
cheers.

Please, help me learn J2EE...point me out to better tutorials or something!

Hi,
Guys, I really need help in trying to learn what J2EE is.
I've got prior knowledge and experience on Java (I thought), but ever since I came across the terms J2EE, EJB, JNI, JSP, JDBC and all that crap, I now don't know what I actually learnt!
Please bear with me I beg of you! :)
1.0: What I've learnt.
===============================
So far, I've learnt (I think) the core/basics of the Java language, covering uhm...the basics up to GUIs, Arrays, IOStreams...yeah I think that's it.
I code using notepad and compile them using the SDK...which up to now I still don't know if it is an SE or EE edition. It's j2sdk1.4.0 the last time I checked. I didn't use any IDE.
I've done (school) projects like a Library System (involves loaning of books and charges etc etc), a Chalet Organizer (Loaning out chalets/rooms and charges etc etc) and an Appointment Organizer.
So what was that which I learnt? Am I right to say that that is only core Java and nothing else and is next to worthless in the working world?
2.0: Why I want to learn J2EE.
===============================
Okay so why do I want to learn specifically J2EE? Well, most employment opportunities here require J2EE and EJB (and maybe some other alien terms) as prerequisites to being a "Java Programmer".
I really need the job as soon as possible (for family's sake) and the job market here is already saturated with webmasters..
3.0: What I have tried.
===============================
Believe me, I tried for like 2 months already to try learn this thing on my own.
I have followed almost exactly to the J2EE "Beginner's Tutorial" found on http://java.sun.com/j2ee/tutorial/ but no matter how far I read, I'm still just as clueless as I was when I was in my mother's womb about what J2EE is all about, even though I did the examples. I stopped somewhere in the middle of "Getting Started" because I realized I wasn't learning anything at all.
4.0: Help meeeeeee...
===============================
4.1:
Can anyone please help me set my head straight and either point me to a REAL beginner's tutorial on J2EE and what the heck it is, or help explain to me slowly what J2EE really is and how to learn it?
4.2:
What's the difference between J2EE and J2SE?!? I initially thought that J2SE was simply just a smaller download which didn't include some of the heavier stuff that the EE carried, but boy was I wrong when that same tutorial asked me to install BOTH of them!
4.3:
Is it right for me to think that EJB are just files which are precoded to facilitate programming? e.g.:(I could've written up my own Date class instead of using the standard Date class that everybody uses.)
4.4:
What the hell is Jakarta Ant? Is it a builder and not a compiler, and may allow me to run built programs just by double-clicking on an e.g. executable? Like C++? So that I don't have to go to command prompt and type "java myApp.class"? (OT, but I think it's ridiculous that Apache has this and not Sun!!)
4.5:
Is there a simpler, much much much simpler example of a J2EE tutorial besides the overly vague tutorial "The Duke's Bank Application"? I need more examples of smaller scale maaaan... Better yet, is there a tutorial around that covers the very very very basics of Java all the way up to J2EE, step by step and with ample explanations?
=========================
Thanks all, I would really really appreciate any heads up you can provide me with.
Sincerely, Kai.

Lee and tsith - same fella -
Run Tomcat as a standalone critter - the install of the current ver (4.1.12?) on a Windows machine sets it up nicely, and you don't have to worry about web connectors and stuff. Just create a few JSPs and dump them somewhere under the ROOT directory of your webapps directory and you should be able to hit them via a URL like http://localhost:8080/test.jsp (assuming you have it running on port 8080). Once you get your fill of the JSP thing, make a serrvlet and look into creating WAR files - then copy your WAR file into webapps subdirectory of your Tomcat installation and play with that. When you've had enough Servlet fun, then look into JBoss and making EAR files and you'll have all sorts of fun with JNDI and JDBC and all those other acronyms.
Ant is just a build tool, not a compiler. Compiling simple java classes is no big deal, 'cause you just type javac MyClass.java or some such. But when you get into complicated build processes (like, compile these classes, making sure to include the J2EE jar and all the other jars I need, and create a WAR file, and deploy it to Tomcat) then Ant really helps.
If you want help documenting your classes, the javadoc tool is for you.
Lee

How learning J2EE?

i've been learning java for one year.now i want to learn J2EE,but as a student,i have no
chance to "do Projec"t,it is impossible to "do J2EE" for only one.
so,how could I learn J2EE ?
3X!

Go download, install and use tomcat, http://jakarta.apache.org/tomcat/index.html . Go through its samples, write some jsp, build some servlets, write and understand taglibs and learn what a war file is. Doing this will get you started and you can do it all with tomcat.

Help in how learning J2EE.

i've been learning java for one year.now i want to learn J2EE,but as a student,i have no
chance to "do Projec"t,it is impossible to "do J2EE" for only one.
so,how could I learn J2EE ?
Thanks!

Start with the J2EE tutorial of course: http://java.sun.com/j2ee/tutorial/1_3-fcs/index.html

What's the flow of learning J2EE at present?

I know that many techniques are emerging nowadays. I studied J2SE already. Now I want to learn J2EE development. Who can tell me what's the structure and the flow to study J2EE?

start with servlets, JSPs, JSTL, and JDBC. You can go a long way with those.
when that feels comfortable, learn Spring.
No need for EJBs.
%

Start to learn XSLT transformation

Hi,
i started to learn XSLT transformation, but i get the first problems very soon.
Here is my coding :
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:sap="http://www.sap.com/sapxsl" version="1.0">
<xsl:strip-space elements="*"/>
<xsl:template match="/">
 <asx:abap xmlns:asx="http://www.sap.com/abapxml" version="1.0">
 <asx:values>
 <EXPORT>
 <xsl:for-each select="BUT000">
 <BUT000>
 <PARTNER>
 <xsl:value-of select="PARTNER"/>
 </PARTNER>
 </BUT000>
 </xsl:for-each>
 </EXPORT>
 </asx:values>
 </asx:abap>
</xsl:template>
</xsl:transform>
My problem is, that the transformation exit on the tag "for-each" and do nothing.
My source is a internal table from type BUT000.
In the internal table are two entries.
Where is my fault?
Regards,
Anton

Check those tutorials:
XSLT Tutorial - http://www.w3schools.com/xsl/
XPath Tutorial - http://www.w3schools.com/xpath/
XQuery Tutorial - http://www.w3schools.com/xquery/default.asp
Regards.
Liang

I started to learn HTML, and I'm using text edit and everything is going fine, when I save the file with a .html extension and open it with safari I only view the code and not the webpage that was supposed to be created.

I started to learn HTML, and I'm using text edit and everything is going fine, when I save the file with a .html extension and open it with safari I only view the code and not the webpage that was supposed to be created.

That is because you don't have a web server configured and running to serve the html page. In order to see the page in a browser you need to access it using a url similar to http://localhost/~yourUserName if you are serving the page from your user account.
Prior to Mountain Lion you could go into web sharing and turn on the web server. With Mountain Lion there is no option, other than using terminal, to turn on the web server. The web sharing menu item has been removed in Mountain Lion. Apache is still on your computer but it will take a little searching these forums or the Internet to find how to turn it on.
If you want a graphic user interface to turn on/off the Apache server you could download and install a server application like xampp, http://www.apachefriends.org/en/xampp.html. I use this and it works well.

Start to learn WebDynpro for Java Development

Hy @all,
i want to learn WebDynpro for Java. What expirences do you have? How i can start to learn first the fundamentals?
Java is not completely new, I develope some programms in C# before.
I buy the following books: WebDynpro for Java and Java Programming with SAP Netwaver....
thx
Micha

Hi, Michael,
First and formost, Welcome to the amazing world of WD Java. Since you have some experience with C#, coding will not be a mammoth task for you. As per, basic concepts of WD Java are concerned, you can refer the following Link:[Concepts Of WD Java|http://help.sap.com/erp2005_ehp_04/helpdata/DE/14/c897427f18d06ae10000000a155106/frameset.htm]
To try your hands on WD Java, there are few sample applications that you can refer:
[Sample Applications WD Java|/docs/DOC-8061#61 [original link is broken]]
I hope this solves your issue, if you are looking for something else, please revert. I'll be happy to help you.
Cheers!!!
Umang

Getting started with Learning Management

I am just starting with learning management implementation in R12.
Can anyone tell me what are the responsibilities for learning management ?
Does Learning Management require separte licence? We have Oracle HRMS and Self-Service already implemented in our system.
When I use the responsibilities
1. Oracle Learning management Administrator
2. Learning Administrator
I see only Reports and Other Requests menu and Submit Report and View report function inside it ? I am not able to see the Catalogue, Resources, Setup functions inside the above two responsibilities.
Any help will be highly appreciated.
Thanks,
-Deb

Hi Deb,
Further to the other responses -
You need to use the responsibility Learning Administrator.
When you go into User Management assign the role of Learning Administrator to your user (make sure you pick the one which has the code UMX|OTA_LRNG_ADMIN)
In Learning Management, the role control what a user can see and do.
You can link the Responsibility to the Role (this will mean that when the Resp is assigned to the user, the Role will automatically be assigned).
You do this in User Management. Find the responsibility 'Learning Administrator' (code =FND_RESP|OTA|OTA_LEARNING_ADMINISTRATOR|STANDARD) and click 'View in Hierarchy'. Then click 'Add Node'. Search for the role Learning Administrator (code UMX|OTA_LRNG_ADMIN) and click 'Quick Select'.
Hope this helps

I am starting to learn html, but when I tried to open the file saved, safari displayed all the html elements. what did I do wrong

I am starting to learn web coding. when I saved my code with html extension and opened in safari, the html element is also displayed. what possibly did I do wrong?

I was trying to attach a screen shot but it keeps missing....
there is no option other than web page(.html) and Rich text. the other option is for microsoft document file.
I am totally new with OS X as I was a developer using Microsoft XP to develop main frame computer. I hope you can help to go through this issue.

How easy/difficult is it to learn J2EE yourself and importance for intervws

Hi,
I m in the process of learning Java [ I ve learnt quite a bit over the last few months and also took a 5 day class which definitely helped.] and have this opportunity to take/or not take, this class in J2EE...
However, mainly due to $$ reasons... I am debating if I can just learn J2EE by myself instead of going to a class [ online sun tutorials, and other sources ] ....and how important it is to know this for inteviewing or could I just get by with:
" knowing Java well and stating I have 'familiarity with J2EE' and want to do more work on J2EE."
P.S. I am also preparing for SCJP.
Any thoughts welcome.

I guess the other way for a "beginner" in JAVA I really don�t see the need for talking EJB, Transaction... With few years of exp in J2EE, my strong feeling is only if you are really "STRONG" with the basics. Thinking about the HIFI stuff will be useful.
Just imagine, if a beginner can do an EJB. How much can we trust on the stability of the system that is developed?
It took nearly 2 years for me to appreciate the need and the usefulness of what J2EE or Sun with regard to J2EE has offered the developers. I have hardly attended any course on Java/J2EE. But I had to learn this stuff for pursuing a job and still living with the help of other developers around me over here.
I have taken the full or maybe most of the potential that was given by the search engines that helped me in doing this good stuff. I also recommend that firstly become an expert on the basics and mastering the rest is simple.

Application does not start automatically after J2EE restart

Hi,
Is there a way to automatically start the deployed applications after a J2EE restart. We have a .ear file which we have to redeploy everytime we restart the J2EE engine. We are on 6.40 SP15.
Regards,
Parvez

Hi Parvez and Ivaylo,
Has any of you used the startup mode setting? I tried using it and set it to always but the application still won't start. Is there anything I'm missing?
My application-j2ee-engine.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application-j2ee-engine SYSTEM "application-j2ee-engine.dtd">
<application-j2ee-engine>
 <provider-name>nexeninc.com</provider-name>
 <fail-over-enable
 mode="disable"/>
 <start-up
 mode="always"/>
</application-j2ee-engine>

Help required in starting to learn Flex 3

Hi All,
I want to start learning Adobe Flex 3.
I have various questions.
1) What is the difference between adobe flex builder 3 and adobe sdk 3.0
I have heard that flex builder 3 is commercial and adobe sdk is freely downloadable. I would like to know the steps from starting to start learning and writing a simple program using adobe sdk 3.0. I am a layman in flex 3. Please help me.
2) which book or site can I refer to start learning adobe flex quickly.
Please guide me as I am unable to start learning on my own currently.
I am using Eclipse 3.4.1.
Thanks.

Hi,
I think you have to go through sample application made in the Flex, so you will get idea what can achieve with Flex. Here is list of some link hope this will helpful to you.
http://www.adobe.com/devnet/flex/?navID=samples
http://flex.org/showcase/
http://flexsamples.blogspot.com/
http://flex.org/software/components
http://fleksray.org/adobe_flex_components_en.html#popuptoolbar
http://fleksray.org/adobe_flex_components_en.html#Auto%20Complete
http://www.stumbleupon.com/demo/#url=http://techrays.wordpress.com/
Thanks.

How to start & stop SAP J2EE services.

Hello,
Can anyone tell me the steps how to Start and Stop SAP J2EE operations and how to troubleshoot the problems when the Java doesn't come-up.
Regards,
Murali

Hi,
In windows,
go to SAP management console,Right click on the SID and then start all tasks
similarly to stop,Right click,
stop all tasks
If it is linux machine,
switch to SIDadm user,by giving the command su sidadm
ex:if SID is J2E,then it will be j2eadm.and then it is startsap or stopsap.
For troubleshooting,
1.go to /usr/sap/SID/JCxx/j2ee/cluster/server0/log
look for defaulttrace.trc file.
you can get to know the errors here and find teh root cause of it.
2.you can also look for devp_trace in SAPmanagement console.
3.Before doing all this,first check if JAVA_HOME,path and LD_LIBRARY_PATH is set properly and proper JDK is taken.
4.check id DB is up and running.
reward points if helpful
Message was edited by:
usha rani

Start to learn J2EE

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