The differents between Java Beans and Enterprise Java Beans

Please help me!
What is the differents between JavaBeans and Enterprise Java Beans (EJB) ?
Thank's for your answer

Enterprise Java Beans are special type of java beans.
EJBs invented to be used via remote VMs or remote computer
systems.They must be deployed on server to become accesible for remote
clients.

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Do I need Java 8 or should i disable it? What happens if i disable it? And what is the difference between Java and Java Runtime?

Do I need Java 8 or should I disable it? What happens if i disable it? And what is the difference between Java and Java Runtime?

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what is the conceptual and functional difference between peripheral target and Enterprise peripheral target?

Does anyone get a chance to see this ?

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what is the difference between jsp :include and server side include(request dispatcher include method)????
i understand that both request dispatcher include method and jsp:include take dynamic data,so when would one use request dispatcher include and when jsp:include.
Is the usage interchangeable?i believe jsp include is used only for jsp/html but include directive can be used to include servlets ,jsp and html....correct me if i m wrong and
do suggest if u hav ny other diff in this context...

The difference really is: in what format do you want your inclusions? If your environment has many Java developers and only a few designers that focus mainly on, say, Flash, that might push you more towards the server-side include() directive. Or, if you have a large set of pages that receive dynamic content that is displayed in a consistent fashion (such as a workflow header area on a page).
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Whats the difference between an INTERFACE and a CLASS?
Please help.
Thanx.

http://search.java.sun.com/search/java/index.jsp?col=javaforums&qp=%2Bforum%3A31&qt=Difference+between+interface+and+class

What's the difference between XI basis and regular basis?

I am an SAP basis admin for years.
Now my corp starts to use XI.
What is the difference between XI basis and regular basis if there is any?
Thanks!

Hi,
No difference... Basis is Basis (Technical consultant)... According to me its just terminology changed. i.e. SAP Administrator instead of SAP basis.
For XI you may need to additionally control the Java stack administartion along with ABAP stack.
Please go thourgh the below link to know about SAP NetWeaver Administrator, then you may compare with regular Basis activities
http://help.sap.com/saphelp_nw70/helpdata/en/7e/c82c42be6fde2ce10000000a1550b0/frameset.htm
Also
Refer - PI/XI administartion study material links
PI Administration, monitoring document
Thanks
Swarup

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Hi,
Could u plz tell me the difference between Abstract class and Interface?
Thanks in advance.
Gopi

Lots.
An abstract class can contain some method implementations, or indeed all the method implementations. It may contain methods with all the various access modifiers. It cannot be instantiated. A class may inherit from only a single abstract class.
An interface contains only public method stubs and constants. A class may implement multiple interfaces. An interface cannot (obviously) be instantiated.
Abstract classes are particularly useful when you need to provide a semi-complete implementation for reuse. Interfaces are used more like types.
Look at java.util.* for some good examples of the use of both.

Can Anybody explain me the difference between a Bapi and a webservice?

Can Anybody explain me the difference between a Bapi and a webservice?

Hi Anil,
<b>BAPI</b>
BAPI is a library of functions that are released to the public
as an interface into an existing SAP system from an external
system.A BAPI function is a function module that
can be called remotely using the RFC technology
BAPI are RFC enabled function modules. the difference between RFc and BAPI are business objects. You create business objects and those are then registered in your BOR (Business Object Repository) which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA.
In this case you only specify the business object and its method from external system in BAPI there is no direct system call. while RFC are direct system call Some BAPIs provide basic functions and can be used for most SAP business object types. These BAPIs should be implemented the same for all business object types. Standardized BAPIs are easier to use and prevent users having to deal with a number of different BAPIs. Whenever possible, a standardized BAPI must be used in preference to an individual BAPI. It is not possible to connect SAP to Non-SAP systems to retrieve data using RFC alone. RFC can acces the SAP from outside only through BAPI and same is for vice versa access.
<b>Webservice</b>
In simpler terms, WebService is an application on the Web/Internet. Wheneever Service is requested by the user, it provides the service (i.e Request/Response)
A web service is a collection of protocols and standards used for exchanging data between applications or systems
In SAP world, we can expose an application into the Webservice. For e.g We can expose ABAP programs into Webservice.
XI uses SOAP adapter to communicate with webservices see below...why only soap adpater???
-> Some remote clients or Web services providers are only able to communicate by means of SOAP messages
->SOAP adapter enables you to exchange SOAP message between remote clients and Web Service Servers and the Integration Server.
-> The SOAP Adapter provides a runtime environment that includes various SOAP components for the processing of SOAP message.
-> You use the SOAP adapter to connect such systems to the Integration Server directly
-> The SOAP adapter uses a helper class to instantiate and control these SOAP components
->The SOAP adapter receives a msg from the remote client or Web service provider, converts the SOAP protocol into XI msg protocol and then sends the msg to the Integration Server to be processed further.
Basically RFCs BAPI are all SAP oriented, Webservices are language / environement independent. So, all one has to do is publish a Webservice and any external system by providing the data in the correct format, can get the approopriate response back.
see these links to know more abt webservices..
http://www.webservices.org/
http://www.w3.org/2002/ws/
regards
biplab

What is the difference between ejb reference and ejb handle?

Hi:
I am newbie for J2EE.
I want to know what is the difference between ejb reference and ejb handle
from the client view and from the container view?
Very Thanks!
Stive

Hi John,,
1) Ejb Object Handle are nothing but a long lived proxy for the
ejb object, using this handle user can disconnect from the Ejb Server/Container
at any time
and after some time using the same handle he can able to resume the conversational
state
with the server / container where he was been disconnected From.
And there are currently two Handles , HomeHandle and Handle for EjbHomeObject
and EjbObject
Respectively. Both these handles have Persistent reference to the EJB Object
2) Ejb Reference is used to lookup a bean from other Enterprise Bean
Ejb reference is a nickname for the JNDI Location that you want to lookup a bean.
your code will looks up a Home object via using this nickname
and the deployer will bind the
nickname to the JNDI location of its choice
EJb Reference are declared in the deployment descriptor
Regards
Karthikeyan Gangadharan
SIP Technologies, Chennai
E-mail-ID : [email protected]
"John Stive" <[email protected]> wrote:
>
Hi:
I am newbie for J2EE.
I want to know what is the difference between ejb reference and ejb
handle
from the client view and from the container view?
Very Thanks!
Stive

What is the difference between Instance variable and Global variable?

Hi folks,
Could you please explain me, "what is the difference between Instance variable and Global variable?"
Are they really same or not?
--Subbu

Hi flounder,
I too know that there is no such a term GLOBAL in java.
generally people use to say a variable which is accessible throught out the class or file has global access
and that will be called as a global variable...
my point is very much similar to what Looce said.
In simple that is not a technical term, but just a causual term.
In technically my question is, "What is the difference between a instance variable and public variable?".
Hi looce,
Thanks for the reply. even thats what my understanding too....in order to confirm that i raised this question..
Your reply has given a clear answer...... thanks again.
--Subbu

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What are the differences between 4.6B and ECC ?.
Thanks

Refer a similar post /message/1783778#1783778 [original link is broken] and my reply there in
You can go through the Release Notes for each of the versions after 4.6B (4.6C, 4.7 , ECC 5.0 & ECC 6.0)
Here are the Links
for SAP ERP Central Component 6.0
http://help.sap.com/saphelp_erp2005/helpdata/en/43/688055b88f297ee10000000a422035/content.htm
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http://help.sap.com/saphelp_47x200/helpdata/en/12/9d78d6d8f74043a32e82be87e433b7/content.htm
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http://help.sap.com/saphelp_47x200/helpdata/en/2b/64fc3e9d3b6927e10000000a114084/content.htm
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What are the difference between 4.6c and 4.7 versions?

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if any please give me answer
regards
ramanji

Hi,
Upgrade SAP or Installation of SAP R/3 and ECC
What is ECC? Where to find the installation steps of ECC 5/6.0 with SQL as database and on windows platform with the steps including Solution Manager installation?
http://service.sap.com/instguides
ECC means Enterprise Central Component.
There are all the relevant installation guides. You NEED SAPNet access because without a registered and licensed SolMan installation number you will not be able to generate the SolMan key for the ECC installation.
Upgrade to 4.7
Have you gone through an upgrade to 4.7?
What are the difference or changes associated with 4.7.
If you are currently on 4.6C and are inching forward to upgrading to 4.7 then this information might be useful to you.
There is very little difference between 4.6 and 4.7, the only "steps" you should need are steps in SU25 ( skip step 1) Then go through all your role and perform a merge old new to bring in the new authorization objects
Just to forewarn you of a potential problem which have been encounter at the point of writing.
After updating/ modifying roles in step 2C, when going back into 2C to make sure all roles are now green, 70% have gone back to red!
The maintenance done is ok, but there seems to be a problem while trying to go back into the roles again to re-generate.
SAP recognizes them as needing "adjustment", so you cannot pick them up in mass generate in PFCG as they do not come in, even though the authorizations tab is red.
This problem is currently with SAP and it is confirmed that nothing have been done wrongly.
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If we have full software of 46c and 47E is it possible to upgrade 46c to 47E or there is a seperate 47E upgrade software need to be requested from SAP?
Where I can get the document with upgrade steps on the service market place?
It is of course possible and supported:
http://service.sap.com/inguides
--> SAP Components
--> SAP R/3 Enterprise
--> (choose your version)
at the bottom there is an "Upgrade guide" for Windows and Unix.
For Upgrades it is recommended to read ALL the notes mentioned in the
upgrade guide and to make sure one is using
- the correct version of the "tp" program
- the correct version of the "R3trans" program
- the correct version of the "R3up" program
All that is explained in the upgrade guide and in the corresponding notes.
If this is your first upgrade you should take a person, that has some experience on doing that for the first time.
Installation of SAP R/3
Currently we are going to install SAP on a new IBM server from the existing COMPAQ server. Where can I get the steps for that.
Configuration is :
   OS - windows 2003 server
   DB - Oracle 9i
   SAP 4.7
http://service.sap.com/instguides
--> SAP Components
--> SAP R/3 Enterprise
--> SAP R/3 Enterprise Core 4.70 / Ext. Set 2.00 (SR1)
--> Inst. Guide - R/3 Enterprise 4.7 x 2.00 SR1 on Win: Oracle
The above url is the SAP Service Marketplace with all the information you need to install, configure and run system. You need to be a valid licensed customer with a user ID and PASSWORD to use that.
Without access you won't be able to successfully run any SAP systems because it has notes, patches etc.

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"Adding Chapter and Compression Markers to Your Sequence
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hi,
what is the difference between system restore and last good known configuration.
in which situation you use system restore ,and in which situation you use last good known configuration.
very short answer wil be enough.
thanks
johan
h.david

Last Known Good Configuration deals only with Starting Windows eg. a bad registry or incorrect driver is preventing Windows to start.It recovers the registry settings of HKEY_LOCAL_MACHINE\System\CurrentControlSet
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The differents between Java Beans and Enterprise Java Beans

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