Links to learn Java

Hi,
I friend of mine has just started learning Java. Can you reccomend any tutorial sessions on the web or some books?
Thank you very much
Maria

By all means, please direct your friend to the JDC's:
New to Java Programming Center: http://developer.java.sun.com/developer/onlineTraining/new2java/
Have your friend subscribe to the center's monthly email supplement and read past issues online:
http://developer.java.sun.com/developer/onlineTraining/new2java/supplements/
As for books, have your friend read this article:
Books to Shorten Your Learning Curve:
http://developer.java.sun.com/developer/onlineTraining/new2java//programming/learn/bookreview.html
Then have your friend check out our tutorials:
http://developer.java.sun.com/developer/onlineTraining/
Starting with the New to Java Programming Center because that is the collection of beginner material all linked in one convenient spot.
Enjoy!
Dana Nourie

Similar Messages

Im Trying To Learn Java :o(

Hey All,
I have decided to get my mind active and randomly learn Java. I say randomly because i am going to be a student again in IT but i like the kinda 3D side and modelling and nice pictures and flash actionscript lol not all this stuff.
Anways i would just start by saying that Java offends me massivly, i know something happened with M$ and Sun and ever since then all i have had with the sun download is problem after problem and crashing and all iw as tryin to do was play some Jippii games. This aint a recent problem, it always happens and i must have reformatted xp around 7 times. So i stay away from applets!!!
Anyways in 2002 when i started learning Flash it was because i seen a site i liked and wanted to do that. The equivelent is kinda like me saying "OK GUYS I HAVE JAVA NOW HOW DO I MAKE DOOM" anyways 2 and a half years later im happy with what i can do and have used alot of different apps and learned alot from 3dsmax to aftereffects etc.
Anyways my goal out of this whole Java thing is to make a game like one i used to play when i was younger on the Amiga 500. No where has this game and a modern one would be great to play. The graphics suck but the physics were really nice.
So my questions are:
1) Java. Ok im going to be honest, i know nothing about Java, i dont even know if it can do what i want and what i really dont want is to spend a while learning this to be stuck with no effects for my game, ie are small particle effects possible in Java? I know Java is pretty slow for a proper language compared to C/C++ but how slow? Can you shift a hundred particles around the screen and still add physics in the background?
2) Java. The whole thing confuses me massivly. Im not a big posting person as i tend to prefer searching but i dont even know where to begin. I will bite the bullet and say i aint going to have alot of problems with the syntax of the language itself. It all looks kinda how i expect it, obviously i dont mean i aint gonna have problems and lot of them but it is not REALLY alien to me to look at a bit code. At the same time it is. I need to know alot of stuff, things that the 2 ebooks i have just ignored. For example, when i compile something, i thought that meant it compiled to the EXE but infact it turned my "heyworld.java" into a "heyworld.class" file. This just makes no sense to me atall because i HATE command line stuff, i see it as reinventing the wheel so im trying to follow through on first of all netbeans (an that went off almost instantly) and a free one that got my hey world to work (well, class). I need to know if a compiler dont make a exe then whats the class for and what exactly is a class file. You know just stuff like that? Does anyone know i kinda dictionary so to speak? baby talk i mean, so far all i seem to get is explainations with words i dont understand.
3) How difficult is it to make a 2D game in Java? To make this plainer, i aint having an applet run somewhere, i want a nice downloadable exe. Of course i will need to start at the beginning but i mean to get a ship on the screen with keys to move it and a "cave" roof to crash into, is this going to take a long long long time to get to that stage? You see, as i said before unless after a few days i have a object on screen to work with, i just get too bored to continue. for example "the object of this is to make a red circle move across the screen" REALLY interests me where as "today we are going to make a mock system for a small business user" sends me back to 3Dmax and the lighting i was reading about lol I tend to look at a piece of code and be devestated by its complexity then try and make it make sense over time. Is this possible with Java? It does work for me this, i was picking apart a isometric code in actionscript before i knew what a tween was.
4) Theres so many different J*** J"EE things floating around that i dont actually know what one i am meant to use? I got 1.4.2 i think but thats all i know. Id like any other things that helped yourselfs start off in Java?
Sorry to go into a bit detail here, its just that with this degree im starting, it soon branches off into 2 groups. Programmers and Designers. I feel i know the design side well enough to make a comparison but it would be rude to leave this side of the things out and write it off without atleast giving it a shot.
Thank you very much for your time :o)
Kind regards,
Clarky.

If you want an idea of what's possible with Java, do a google search for "java games" or something like that. I've seen occasional postings of what are supposed to be pretty cool games that have been written in Java, but I'm not into games, so I've never bothered to check 'em out personally.
As to whether you can do it, well, you'll have to figure that out. Learning Java well enough to create a video game is not a trivial task. I don't just mean the syntax of the language, I mean the many APIs you'll be using, concepts like multithreading and exception handling, good OO principles, etc. Without a good handle on that stuff, your code will quickly turn into a morass that will be difficult to enhance, maintain, or debug.
I suspect that the code to make a particular graphical event occur will be more verbose and complex in Java than in ActionScript, given that Java is a general purpose language and AS is more geared to GUIs. Nonetheless, I'm sure there are APIs out there (some free, some not) that will provide some higher level constructs than the core APIs to make some of that easier. You'll still be operating in the idiom of a general programming language though.
There may also be a hybrid solution available--where you use Java to express the game logic and another language to express the graphics. I don't know anything about this kind of stuff though, so that's just speculation.
You may get more precise advice in the GUI Building forums on http://forum.java.sun.com/ than here.
Here are some resources to get you started on Java in general.
Sun's basic Java tutorial
Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's Thinking in Java (Available online.)
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java.

Learning Java proxies - landscape question

Hi guys,
I could use a little help to learn Java Proxies, I'm just starting to get familiar with Java, I'm coming from the ABAP side.
First and foremost what do I need from the system point view?
We have an XI box and using file/FTP/IDoc adapters and also ABAP Proxies, I wrote some Java (mapping)functions, I am familiar with these.
But for a Java proxy, I would need a separate Java server(?) to run the application on, is this correct?
Can I use my own PC for this? (for learning purposes), I have NWDS installed on my PC.
What are the steps to write a small simple Java Proxy.
I would very much appreciate some help, guys, how do I start?
Thanks a lot,
Viktor

Hi Viktor,
You can work from your own machine. Becuase in Java Proxy scenarios, you are deploying EAR files in the XI server, and thru XI , you are executing the method written in the Java Application.
Just check these links-
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/a068cf2f-0401-0010-2aa9-f5ae4b2096f9
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f272165e-0401-0010-b4a1-e7eb8903501d
/people/prasad.ulagappan2/blog/2005/06/27/asynchronous-inbound-java-proxy
/people/rashmi.ramalingam2/blog/2005/06/25/an-illustration-of-java-server-proxy
Demo ~
https://www.sdn.sap.com/irj/sdn/docs?rid=/webcontent/uuid/110ff05d-0501-0010-a19d-958247c9f798#jdi [original link is broken]
Hope this helps,
Regards,
Moorthy

I want to start learning Java

I want to learn Java, and write Java codes. I searched through this website for an article which explains what a develepment environment I must have, but couldn't find anything, because it is designed in a too formal manner.
Can you simply give me a list of software to install to setup myself a Java development system?

hkBattousai wrote:
You kept giving me links from this website. I said it is very fomal and %95 of the information is trivia.
Anyway I found the answer on a third party program's website:
http://www.jcreator.com/installation.htm
All I need is
1) JDK
2) A Java IDE
Is this right?Of course, JCreator is a nice IDE for beginners. Also, it is simple to use.

How to learn Java!!(help me!)

I am a beginner.I've learned Java for 6 months.But I still don't konw what is Java.Can somebody tell me how to learn Java step by step?For instance,which one should I learn first,and then what to learn next?Thank you!!!!

I've learned Java for 6 months.But I
still don't konw what is Java.I take it by "learned Java for 6 months" you don't mean programming with it. If you've done programming with it, you should have some idea of what you're actually doing. If not, here is a basic idea of what Java IS:
1. Java is a virtual machine (it's kind of like a "fake" operating system running on top of your own operating system (like Windows XP).
2. Any operating system that has a copy of the Java Runtime Environment ported to it can run Java programs. This allows Java programs to be cross-platform.
3. Java is also the name of the language used to write programs for this virtual machine.
4. Try clicking on the Documentation link at the left of this forum for more information about Java :P

Interested in Learning Java Programming.

Hello All,
I a college student and I am interested in learning Java programming. Where would be a good place for me to start?
Thanks

Sun's basic Java tutorial
Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's Thinking in Java (Available online.)
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java.

Why learn Java Instead of C++ or...

Why should people learn Java and use Java than C++ or other programming languages?
Some of my personal reasons are:
1. Java supports four look and feels without having to create them from scratch, they are already available for quick use.
2. Java compiles fast, and runs fast. It's easy to understand. You can *.jar it into one file! No *.dll's!!!

I like Java too (duh!), but...
Why should people learn Java and use Java than C++ or
other programming languages?
Some of my personal reasons are:
1. Java supports four look and feels without having
to create them from scratch, they are already
available for quick use.
What? how is that an advantage over much of anything? OK, you could say that you can write a very complex GUI application and have it run on a number of very different applications using a common L&F or a platform-appropriate L&F.
2. Java compiles fast, and runs fast. It's easy to
understand. You can *.jar it into one file! No
*.dll's!!!Before there were .DLL's and .so's there were big-ass executable files with everything linked into them. Oh wait, you can still do that on Win32 and Unix if you want to (except of course for the OS shared libraries which Java's JRE needs too).
Chuck

Learning JAVA

Hello!
I'm in the process of learning JAVA. I'm really new to it so i was wondering; is there any websites, programs, tutorials, books etc that i should read to be able to learn it better?
Cheers,
owg123

They 're very hard to find as warnerja posted, but nevertheless I've managed to find a few over the years.
[Sun's basic Java tutorial|http://java.sun.com/docs/books/tutorial/]
[Sun's New To Java Center|http://java.sun.com/learning/new2java/index.html]
Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
jGuru
A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch
To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
[Yawmarks List|http://forums.devshed.com/java-help-9/resources-for-learning-java-249225.html]
[The Java Developers Almanac|http://www.amazon.com/exec/obidos/tg/detail/-/0201752808?v=glance]
[http://javaalmanac.com|http://javaalmanac.com]
Bruce Eckel's [Thinking in Java(Available online.)|http://mindview.net/Books/DownloadSites]
Joshua Bloch's [Effective Java|http://www.amazon.com/Effective-Java-2nd-Joshua-Bloch/dp/0321356683]
Bert Bates and Kathy Sierra's [Head First Java|http://www.amazon.com/exec/obidos/tg/detail/-/0596004656?v=glance ]
James Gosling's [The Java Programming Language|http://www.bookpool.com/sm/0321349806]
Gosling is the creator of Java. It doesn't get much more authoritative than this.
Joshua Bloch and Neal Gafter [Java Puzzlers.|http://www.javapuzzlers.com/]

Learning java bean

is there any tutorial for learning java bean for beginners?
regards.

i thank you very much.
i am new to java beans, as such i do not have any knowledge about it.
aren't there some tutorials with guided practice? it would be kind of you could tell me some links where i can have them.
regards.

Learning Java on Leopard

I wanted to learn java and have Mac OS X 10.5.1 (Leopard). When I type in "java -version" it says I have version 1.5 (which I guess is Java 5). But the tutorials on the java.sun.com website are for java 6. It gives a link to download java 6 for Mac OS X at apple's developer's site. The download at the site, however, is for Mac OS X 10.4. Will this work for Leopard? Is there another place to download Java 6 for Leopard? Thank you in advance.

I've been learning Java on windows for a while now using Java 6 (and the tutorials it has), and when I switched to mac all I had to do was recompile the files and they worked fine. It doesn't seem there's any major differences between the versions that someone just starting out would notice.
(I think it's actually better to keep java 1.5, since when you compile from it for web applets you know they'll work on other macs, whereas the programs I'd compiled using Java 6 weren't working on my mac)

Which book is good for learning java?

1. Introduction to Java Programming, Comprehensive (8th Edition)
2. Core Java(TM), Volume I--Fundamentals (8th Edition)
Or others?
I haven't any programming experience!
Thank you!

This is the set of often recommended resources:
TheList?
[Sun's basic Java tutorial|http://java.sun.com/docs/books/tutorial/]
[Sun's New To Java Center|http://java.sun.com/learning/new2java/index.html]
Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
jGuru
A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch
To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
[Yawmarks List|http://forums.devshed.com/java-help-9/resources-for-learning-java-249225.html]
[The Java Developers Almanac|http://www.amazon.com/exec/obidos/tg/detail/-/0201752808?v=glance]
[http://javaalmanac.com|http://javaalmanac.com]
Bruce Eckel's [Thinking in Java(Available online.)|http://mindview.net/Books/DownloadSites]
Joshua Bloch's [Effective Java|http://www.amazon.com/Effective-Java-2nd-Joshua-Bloch/dp/0321356683]
Bert Bates and Kathy Sierra's [Head First Java|http://www.amazon.com/exec/obidos/tg/detail/-/0596004656?v=glance]
James Gosling's [The Java Programming Language|http://www.amazon.com/Java-TM-Programming-Language-4th/dp/0321349806/ref=sr_1_1?ie=UTF8&s=books&qid=1247059012&sr=1-1]
Gosling is the creator of Java. It doesn't get much more authoritative than this.
Joshua Bloch and Neal Gafter [Java Puzzlers.|http://www.javapuzzlers.com/]

About learning java 3d

hi dear,
I am doing a java 3d learning website. I need to get some information form 3d learners. Could you help me to answer three questions below? Thank you so much.
1)Did you have any problem in set up 3d working environment? What are they?
2) When you learn java 3d which part do you think is the most difficult part?
3) What information would like to see in a java 3d learn website?

1) Du have any problem in set up 3d working environment? What are they?
Done it many times over the last few years, so I don't, but from what I can tell a lot of people don't understand the basic Classpath stuff.
3) When you learn java 3d which part do you think is the most difficult part?
Learning to do things the Java3D way seems to throw a lot of people - explaining why you should only update the scene using behaviours, how the scenegraph works and so on would, I think, be very useful to a lot of people.
Vectors, Matrices and the underlying mathematics would also be very useful, although I don't know they can ever be made simple.
3) What information would like to see in a java 3d learn website?
I need to know more about model and animation importing and management, but I'm probably not your typical user.
I'd find a comprehensive set of links to tutorials would be very helpful too- there are a lot of them around the place, but I've not found anywhere that authoritatively lists all the available tutorials - maybe with a bit of information on what they cover and how up to date they are.

What is the best way to learn Java??????

I am trying to learn java for a few weeks now.
But I am struggling to find out what the possibilities in java are.
With e.g. Visual Basic you have help topics to guide eyou through the language and all the objects, functions etc you can use.
Now while learning java I miss the help topics. I do hava all the API documentation, but how will I know which class to use?? I also have the tutorials, but they are more about the syntax of java.
Can somebody give me some pointers on what the best approach is for learning java. I also would like to know what is a good texteditor to build the applications.
greetings maclli

Here's some links that should get you started. I use them a lot:
API Reference: http://java.sun.com/j2se/1.4.1/docs/api/index.html
Language Specs: http://java.sun.com/docs/books/jls/second_edition/html/j.title.doc.html
Official Tutorial: http://java.sun.com/docs/books/tutorial/index.html
Sorry I can't recommend any good books, though. The tutorial has a lot of good information in it, and the API reference is indispensable.
Good luck,
Jason

Provide me the links to learn BAPI and BADI

Please send me the links to learn BAPI and BADI
Thanks in Advance,
Viven

Hai Viven
Go through the following Document & Links
Bapi to create customer master
BAPI_CUSTOMER_CREATEFROMDATA
BAPI_CUSTOMER_CREATEFROMDATA1
Or you can use FM SD_CUSTOMER_MAINTAIN_ALL
what is BAPI?
BAPI stands for Business API(Application Program Interface).
I have answered this question before..
A BAPI is remotely enabled function module ie it can be invoked from remote programs like standalone JAVA programs, web interface etc..
You can make your function module remotely enabled in attributes of Function module but
A BAPI are standard SAP function modules provided by SAP for remote access. Also they are part of Businees Objest Repository(BOR).
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 u 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.
The following standardized BAPIs are provided:
Reading instances of SAP business objects
GetList ( ) With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
The BAPI GetList() is a class method.
GetDetail() With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method. BAPIs that can create, change or delete instances of a business object type
The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
Create( ) and CreateFromData! ( )
The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods.
Change( )
The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method.
Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
Check these Links out
http://searchsap.techtarget.com/ateQuestionNResponse/0,289625,sid21_cid558752_tax293481,00.html
http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
http://www.sap-img.com/fu033.htm
http://www.sap-img.com/abap/ale-bapi.htm
Please check out this thread..
Re: bapi
Also refer to the following links..
www.sappoint.com/abap/bapiintro.pdf
www.sap-img.com/bapi.htm
www.sap-img.com/abap/bapi-conventions.htm
www.planetsap.com/Bapi_main_page.htm
www.sapgenie.com/abap/bapi/index.htm
Checkout !!
http://searchsap.techtarget.com/originalContent/0,289142,sid21_gci948835,00.html
http://techrepublic.com.com/5100-6329-1051160.html#
http://www.sap-img.com/bapi.htm
http://www.sap-img.com/abap/bapi-conventions.htm
http://www.sappoint.com/abap/bapiintro.pdf
Java Connector(JCO) can call not only BAPI's but also the function modules which are remotely enabled..
BAPI's as i said earlier are remotely enabled function modules..
Hence, JCO can call also BAPI's(n not only BAPI's as u mentioned).
Badi's
BADI Link
http://help.sap.com/saphelp_erp2005/helpdata/en/73/7e7941601b1d09e10000000a155106/frameset.htm
http://support.sas.com/rnd/papers/sugi30/SAP.ppt
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/abapindx.htm
http://members.aol.com/_ht_a/skarkada/sap/
http://www.ct-software.com/reportpool_frame.htm
http://www.saphelp.com/SAP_Technical.htm
http://www.kabai.com/abaps/q.htm
http://www.guidancetech.com/people/holland/sap/abap/
http://www.planetsap.com/download_abap_programs.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c8/1975cc43b111d1896f0000e8322d00/content.htm
http://www.allsaplinks.com/badi.html (BADI Implementations)
/people/thomas.weiss/blog/2006/04/03/how-to-define-a-new-badi-within-the-enhancement-framework--part-3-of-the-series [ How to imp. Badi & h to use filter]
/people/alwin.vandeput2/blog/2006/04/13/how-to-search-for-badis-trace-it ( HOw to find Badis )
/people/thomas.weiss/blog/2006/04/18/how-to-implement-a-badi-and-how-to-use-a-filter--part-4-of-the-series-on-the-new-enhancement-framework [ (PART _ 4) How to imp. Badi & h to use filter) ]
/people/thomas.weiss/blog/2006/05/03/source-code-enhancements--part-5-of-the-series-on-the-new-enhancement-framework [ (part - 5)
Regards
Sreeni

How to generate all the links of the java api methods

Hi all,
I noticed from my docs that the JAVA API methods are not linked. They are just static text. How can i link all the java api methods to a root url examble: java.sun.com/j2se/docs/javax/JFrame#pack()
java.sun.com/j2se/docs/javax/JFrame#setVisible()
java.sun.com/j2se/docs/java/sql/ResultSet#executeQuery()
and so on.
Thank you in advance.

It sounds like you'd like to link to our docs on java.sun.com.
You can do this using -link or -linkoffline
http://java.sun.com/j2se/1.4.2/docs/tooldocs/solaris/javadoc.html#link
Start by reading the section "Choosing between -linkoffline and -link"
Basically, try this option first:
-link http://java.sun.com/j2se/1.4/docs/api
If this fails (because your shell cannot access java.sun.com),
then copy package-list from java.sun.com to your current directory,
then use this option:
-linkoffline http://java.sun.com/j2se/1.4/docs/api .
Notice that the second argument is a dot "." to indicate
that package-list is in the current directory.
-Doug Kramer
Javadoc team

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