Java

[Former Member]

Hello friends I am coming the SAP BackGround and with XI Knowledge. I am trying to learn Java too. Towards this mission I have completed my Core Java (Understood whats a Class, Object, Constructor, Inheritance, Overloading, Overriding, Encapsulation, PolyMorphism, File Handling, Exception Handling, String Handling).

Now would some one direct me what should be the next area that I should jump in the Java world(Like EJB, Servlet, Webservice etc...........)

Also if you could take me to some good tutorials on Java that would also help me a lot.

Appreciated.

[Former Member · Accepted solution]

You can go in the following order.

1) EJB 2) Servlets and 3) Web Service

http://help.sap.com/saphelp_nw04/helpdata/en/7d/cf0c8abcc34594ba9d3bbd5dd22155/frameset.htm

http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html

http://www.weblogic.com/docs/examples/ejb/Package-examples.ejb.html

http://www.dynamic-apps.com/tutorials/EJB_1.jsp

http://www.tusc.com.au/tutorial/html/chap6.html

[Former Member]

As u are through with the core Java concepts ..Please go through

1.servlet

2.JSP

3.Struts

4.EJB

You would need to understand servlet well as it is the basic component of the rest three ...

[Former Member]

Hi Mohini,

I am doing SAP Netweaver product testing.for that knowledge i am giving suggestions.

1) u should know about webservices thing, bcoz one of the NetWeavers feature is it integrates Web application and SAP application. so you also know about servlets and EJB.

2) Netweaver Have IDE also ,so u can implement u r web applications .

3) you learn java like this SERVLETS,JSP,STRUTS,EJB,WEBSERVICES.

[Former Member]

Dear Mohini,

as I am on the road from ABAP and ABAP OO to Java, could you please give me some useful links where to start with Java Core themes you mentioned? I would use the links given in replies to follow-up afterwards.

Thank you in advance

[Former Member]

SAP and XI. Now that you have a decent understanding of core java, you should start into the next level i.e. J2EE (servlet, jsp, EJB, XML etc), SAP-JCO etc.

Lots of materials are available on the net like,

EJB:

http://java.sun.com/developer/onlineTraining/Beans/EJBTutorial/

http://java.sun.com/developer/onlineTraining/EJBIntro/EJBIntro.html

http://www.conceptgo.com/gsejb/index.html

http://www.tutorialized.com/tutorials/Java/EJB/1

JSP / Servlet:

http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/

http://java.sun.com/j2ee/1.4/docs/tutorial/doc/

http://javaboutique.internet.com/tutorials/JSP/

SAP-JCO:

http://www.sapgenie.com/interfaces/javaconnector.htm

http://searchsap.techtarget.com/featuredTopic/0,290042,sid21_gci1056433,00.html?bucket=REF

cheers

Sameer

[Former Member]

Thanks Sameer and Jenni.

In what order I need start

EJB

JSP/Servlet

SAP-JCO

or in different order?

[Former Member]

Hi Mohini,

Please be advised that the j2ee 1.4 documentation for EJBs and JSP-s is quite old. There is already new specification ready, the last released server supports it, and I guess your aim is to learn the new stuff that will be used in the future, right ?. Thus instead of

http://java.sun.com/j2ee/1.4/docs/tutorial/doc/

please check :

http://java.sun.com/javaee/5/docs/tutorial/doc/index.html

here is the SDN pages for the Java EE 5 support :

<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/index?rid=/library/uuid/da699d27-0b01-0010-99b0-f11458f31ef2">check it out</a>

Btw, at least in my opinion the JSP/Servlets are more easy to understand and create an application with than the EJB-s.

HTH

Peter

[Former Member]

Mohini

It depends on which area of SAP Netweaver you are trying to master. If it is XI, then you will be needing more of Core Java, JCO, EJBs, XML and Webservices. If it is EP then you might need knowledge on JSP, JSP Struts, JCO, XML and Webservices etc. Of course the common thread is a sound knowledge on core java is mandatory. Depending on the above you can choose your order of preparation.

cheers

Sameer