SCDJWS Exam Objectives Oriented Book

Hi
I am planning to appear for SCDJWS certification exam for which i had a query regarding the preparation for it.
Just like there is Kathy Sierra book available specific for SCJP certification objectives, is there any book available for SCDJWS certification?
If yes, kindly provide the details of the book.
Thanks
Rohit

no. One was being written but after the release date had been missed by some 2 years already the project now seems to have been abandoned.
The amount of material to be absorbed for the exam is staggering, and most of it both bone dry and totally irrelevant to pretty much all real world web services development, making the exam both tedious and irrelevant itself.

Similar Messages

Any good Java object oriented book?

Hi,
I am looking for a Java book that teaches good object oriented programming. Is there any good Java object-oriented book in the market?
Thanks.

"Thinking in Java" 2nd Edition by Bruce Eckels. You
can download it from his website - the url escapes me
at the minute. You should be able to find it no
problem though.I second that recommendation (although it's "Eckel" without the "s"). He now has a Beta 3rd edition of the book.
The URL is http://www.bruceeckel.com/

Who has the book:Object-Oriented Programming with ABAP Objects

Hello everyone
Now i want to learn ABAP OO,and Lots' of guys told me that the book Object-Oriented Programming with ABAP Objects is realy a good book.but i searched on the net,and could not got PDF of this book,could some one gave me the net address if you know where to download the book or send me to my Mailbox:<email id removed by moderator>,I will very glad to receive any response from you,
of course,if you have some advise on how to learn ABAP OO or some other material ,hope you could share your meaning with me, hope to receive your response.
Best regards!
From Carl
Moderator message : Moved to career center.
Edited by: Vinod Kumar on Aug 27, 2011 9:21 AM

I'm sure you're not asking for illegal, "free" downloads. You can legally purchase the book, also in electronic format, at sap-press.com
Thomas

Good book on Object Oriented Design?

Can you recommend a good book on Object Oriented Design with lots of practical examples? I already have:
http://www.amazon.com/Design-Patterns-Object-Oriented-Addison-Wesley-Professional/dp/0201633612/ref=sr_1_1?ie=UTF8&qid=1238324375&sr=8-1
But currently I need a book with a more basic approach.

corlettk wrote:
I like Thinking In Java... Also: google for "yawmark's list"TIJ is useless, especially for teaching OO design. It teaches (or tries to) Java as a procedural language.

Anyone recommends a good book for object oriented programming

I am a college student in computer engineering (Software) and have been programming using Java for over a year. I have become really interested in the design of softwares and the "beauty" of object oriented programming, and thus would like to advance my knowledge about the topic (my university offers an advanced oop class but I would have to wait another 6 months to take it). So my question is, could you recommend me any book that covers the subject of object oriented programming extensively? (I have learned most of the oop I know from "An Introduction to Programming and Object Oriented Design Using Java" by Nino and Hosch.
Thanks in advance

Some years ago I remember cutting my teeth on OOP using an excellent book by Grady Booch. If it's still in print and has been updated, it may be worth a look. Again it was decent. Also consider picking up a book on design patterns. Good luck.
Edit: I found it, it's called "Object-Oriented Analysis and Design with Applications", and it's in its third edition. You can find it here on Amazon.
Edited by: Encephalopathic on Apr 22, 2008 2:48 PM

Anyone recommends a good book for object oriented programming (advanced)

I am a college student in computer engineering (Software) and have been programming using Java for over a year. I have become really interested in the design of softwares and the "beauty" of object oriented programming, and thus would like to advance my knowledge about the topic (my university offers an advanced oop class but I would have to wait another 6 months to take it). So my question is, could you recommend me any book that covers the subject of object oriented programming extensively? (I have learned most of the oop I know from "An Introduction to Programming and Object Oriented Design Using Java" by Nino and Hosch.
Thanks in advance

jwenting wrote:
I never tire of pushing ["Agile Software Development, Principles, Patterns, and Practices "|http://www.amazon.com/Software-Development-Principles-Patterns-Practices/dp/0135974445] by Robert Martin.
You probably meant [Agile Software Development, Principles, Patterns, and Practices|http://www.amazon.com/Software-Development-Principles-Patterns-Practices/dp/0135974445] ;-)
Remember, quotes in link names break the forum ...

Making classes talk to each other, getting my head around object-oriented

How many questions can I ask before people get annoyed? Hope I'm not asking too many. This is probably a dumb question, but trying to do this whole object-oriented thing is making my head spin. I want my program to make something happen in Panel 2 when there's a mouse event in Panel 1 and vice versa. In psuedo-code (very pseudo):
panel1.addMouseListener(new MousyListener());
private class MousyListener implements MouseListener
public void mouseEntered(MouseEvent event) {
Make stuff happen in panel2
I don't even know where to start. I've looked at the tutorials,I've looked in my books, but I still as confused as ever. Could someone please give me a hint as to how I make this happen?

codinatrix wrote:
How many questions can I ask before people get annoyed? Hope I'm not asking too many. You can ask as many questions as you like.
What is annoying is when people cross post the same question. Or when people ask 37 obviously exam type questions in the span of 5 minutes. But as you're not doing either of those don't worry about it.
This is probably a dumb question, My personal motto (gained by my personal experience) is "there's no question so profound you won't feel like an idiot later for not knowing".
but trying to do this whole object-oriented thing is making my head spin.Ah yes. It will do that.
I want my program to make something happen in Panel 2 when there's a mouse event in Panel 1 and vice versa. In psuedo-code (very pseudo):A number of suggestions for you.
1) When posting code on this forum please make sure and use the code formatting tags. You can do this by selected the code in the posting message box and clicking the CODE button.
2) I would stay well clear of Swing for awhile. It (and GUI in general for that matter) is not the easiest way to learn OO ness. In fact, in my opinion, it's about the hardest. I don't know where you are with your learning and what you know and don't know though so this may be out of place. If not though I would recommend one to play around with interfaces and abstract classes for awhile. I think once one understands the point of an abstract class one is well on the way to a solid foundation of Java OOness.
3) This will contradict point 2 but for Swing you should learn about the MVC pattern. Here are a couple of links on the subject http://en.wikipedia.org/wiki/Model-view-controller and http://java.sun.com/blueprints/patterns/MVC.html
MVC is important because it explains the how-to and why of what one should do with OOness when it comes to GUI.
4) Don't be afraid to get it wrong. The best way to learn this stuff is by practice. Do it in a way you understand and that makes it work. Then go back and think how you could do it better. Think about how you could encapsulate your classes. Think about how you can seperate the logic of your application from the GUI.
Good luck.

Trying to understand the basic concept of object oriented programming.

I am trying to understand the basic concept of object oriented programming.
Object - a region of storage that define is defined by both state/behavior.
( An object is the actual thing that behavior affects.)
State - Represented by a set of variables and the values they contain.
(Is the location or movement or action that is the goal that the behavior is trying to accomplish.)
Variables- (What does this mean?)
Value - (What does this mean?)
Behavior - Represented by a set of methods and the logic they implement.
( A set of methods that is built up to tell's the how object to change it's state. )
Methods - A procedure that is executed when an object receives a message.
( A very basic comand.For example the method tells the object to move up, another method tells the method to go left. Thus making the object move up/left that combination is the behavior.)
Class - A template from which the objects are created.
( I am very confused on what classes are.)
- The definitions of the words I obtained from the "Osborne Teach Yourself Java". The () statements are how I interperate the Mechanisms (I do not know if Thats what you call them.) interact with each other. I understand my interpretation may be horribly wrong. I will incredibly appreciate all the support I may get from you.
Thank you

Object oriented programming is a replacement for the older idea of procedural programming (you can research procedural programming in google). As I understand it, in procedural programming, you have a step by step set of function calls to accomplish some task. Each function receives a data structure, manipulates it, and passes it to the next function. The problem with this is that each function preforms some action for the overall task and can't easily be reused by some other task. Its also harder to read the flow of what is happening with raw data structures flying all over the place.
In object oriented programming, an object calls a function of another object and receives back, not a data structure, but another object. Objects contain a data structure that can only be accessed by its functions. An object is not so much a sub component of a bigger task, as it is a service that any other task can use for any purpose. Also, when you pass an object to the caller, the caller can ask questions about the data structure via its functions. The developer doesnt have to know what the previous function did to the data by reading up on any documentation, or having to reverse engineer the code.
I suggest the best way of learning this is to code something like a library object.
A library object contains a collection of book objects
A book object contains a collection of chapter objects
A chapter object contains a collection of paragraph objects
A paragraph object contains a collection of sentence objects
A sentence object contains a collection of word objects.
Add functions to each object to provide a service
Example: A library object should have a:
public void addBook(Book book)
public Book getBook(String title)
public boolean isBookInLibrary(String title)
The key is to add functions to provide a service to anyone who uses your object(s)
For example, what functions (service) should a paragraph object provide?
It shouldn't provide a function that tells how many words there are in a sentence. That function belongs to a sentence object.
Lets say you want to add a new chapter to a book. The task is easy to read
if you write your objects well:
Sentence sentence1=new Sentence("It was a dark and stormy night");
Sentence sentence2=new Sentence("Suddenly, a shot ran out");
Paragraph paragraph=new Paragraph();
paragraph.addSentence(sentence1);
paragraph.addSentence(sentence2);
Paragraphs paragraphs=new Paragraphs();
paragraphs.addParagraph(paragraph);
Library library= new Library();
library.getBook("My Novel").addChapter("Chapter 1",paragraphs).
Now, lets say you want to have a word count for the entire book.
The book should ask each chapter how many words it contains.
Each chapter should ask its paragraphs, each paragraph should ask
its sentences. The total of words should ripple up and be tallied at each
stage until it reaches the book. The book can then report the total.
Only the sentence object actually counts words. The other objects just tallies the counts.
Now, where would you assign a librarian? What object(s) and functions would you provide?
If written well, the project is easily extensible.

Converting sample Procedural ABAP code in Object oriented code...

Hello Gurus,
I am learning object oriented ABAP. The best way to learn it is do it practically. If I want to change the following code in OO code , how can it be done ?
TABLES : gb01.
Data Declaration
DATA : BEGIN OF i_mid OCCURS 0,
        mid(2),
        text(10),
       END OF i_mid.
DATA :v_tabix LIKE sy-tabix.
Selection Screen
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME
                                   TITLE text-001.
PARAMETER : p_modif(1) DEFAULT 'U',
            p_class LIKE gb01-boolclass DEFAULT '009',
            p_cltyp LIKE gb01-classtype DEFAULT 'S',
            p_table LIKE gb01-bcltab DEFAULT 'BSEG',
            p_field LIKE gb01-bclfield DEFAULT 'HKONT',
            p_excld LIKE gb01-bexclude DEFAULT ' '.
SELECTION-SCREEN END OF BLOCK b1.
Selection Screen F4 Help for Modif ID's
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_modif.
PERFORM get_modifid.
Start of Selection
START-OF-SELECTION.
CLEAR gb01.
CASE p_modif.
    WHEN 'U'. "Update
      UPDATE gb01
      SET bexclude = p_excld
      WHERE bcltab = p_table
      AND bclfield = p_field
      AND boolclass = p_class
      AND classtype = p_cltyp.
      IF sy-subrc NE 0.
        WRITE : / 'UPDATE - KO'.
      ELSE.
        WRITE : / 'UPDATE - OK'.
      ENDIF.
    WHEN 'I'. "Insert
      gb01-bcltab = p_table.
      gb01-bclfield = p_field.
      gb01-boolclass = p_class.
      gb01-classtype = p_cltyp.
      gb01-bexclude = p_excld.
      INSERT INTO gb01 VALUES gb01.
      IF sy-subrc NE 0.
        WRITE : / 'INSERTION - KO'.
      ELSE.
        WRITE : / 'INSERTION - OK'.
      ENDIF.
    WHEN 'D'. "Delete
      DELETE FROM gb01
      WHERE bcltab = p_table
      AND bclfield = p_field
      AND boolclass = p_class
      AND classtype = p_cltyp.
      IF sy-subrc NE 0.
        WRITE : / 'DELETE - KO'.
      ELSE.
        WRITE : / 'DELETE - OK'.
      ENDIF.
ENDCASE.
*&      Form get_modifid
      F4 Help for modif id field
FORM get_modifid.
i_mid-mid = 'U'.
i_mid-text = 'Update'.
APPEND i_mid.
i_mid-mid = 'I'.
i_mid-text = 'Insert'.
APPEND i_mid.
i_mid-mid = 'D'.
i_mid-text = 'Delete'.
APPEND i_mid.
CALL FUNCTION 'POPUP_WITH_TABLE_DISPLAY'
       EXPORTING
            endpos_col   = '20'
            endpos_row   = '12'
            startpos_col = '10'
            startpos_row = '10'
            titletext    = 'Modification Ids'
       IMPORTING
            choise       = v_tabix
       TABLES
            valuetab     = i_mid
       EXCEPTIONS
            break_off    = 1
            OTHERS       = 2.
IF sy-subrc NE 0.
    EXIT.
ENDIF.
READ TABLE i_mid INDEX v_tabix.
IF sy-subrc EQ 0.
    p_modif = i_mid-mid.
ENDIF.
REFRESH i_mid.
ENDFORM.                    " get_modifid
Regards,
Rajesh.

Hi Rajesh,
Hey here are some of the links, please chek these links u have lot of examples
http://www.****************/Tutorials/OOPS/MainPage.htm
and also please check these threads
OOABAP
book for OOABAP?
Best regards,
raam

Object Oriented Programming concepts

Hi Friends,
I need your help to understand the Object Oriented Programming concepts.
Please help me…
Thanks,
Fl4syed

Hi,
We can learn oops concepts very easily.Refering some books and search this concepts in some websites related to it.I think the author Robert lafore of oops is one of the best way to learn oops concepts.

Object oriented programming aspects in Oracle

Dear All,
Can you one explain me the aspects of Object Oriented Programming in Oracle. How to use oops concepts in Oracle Procedures, functions, packages, etc.
Thanks,
Moorthy.GS

Oracle 9i introduces support for inheritance, method overriding and dynamic method dispatch (or "dynamic binding", or "virtual").
A method call is dispatched to the nearest implementation, working back up the inheritance hierarchy from the current or specified type.
See, for example, how we can implement the Template Design Pattern in PL/SQL, using inheritance, method overriding and dynamic method dispatch:
http://www.quest-pipelines.com/pipelines/plsql/tips06.htm#OCTOBER
Oracle 11g introduces support for "super" object-oriented keyword. One attempt to do this in PLSQL 9i/10g:
Calling the Parent Object's Version of an Overridden Method
http://www.quest-pipelines.com/pipelines/plsql/tips03.htm#JUNE
I expect some OO improvements in the future (in Oracle 12oo ...):
1. References between transient objects (instances of objects types) and (then) garbage collector
2. Generic classes (templates, generics) like in Eiffel, C++, Java 5 (PL/SQL was modeled after ADA 83, and ADA 83 has generic packages)
3. Multiple inheritance like in Eiffel (inner classes like in Java - no, please)
4. Design By Contract like in Eiffel (C++ / Java 1.4 assert is not enough)
Design by contract (DBC) is a method whose author is Bertrand Mayer, also maker of OOPL language Eiffel
(Eiffel was designed in 1985, commercialy released in 1986, ISO-standardized in 2006).
Simplified, DBC is based on principle that in each routine (procedure or function) with standard code,
two additional parts – PRECONDITION and POSTCONDITION - need to be asserted.
An additional assertion in class is called INVARIANT.
Contract is based on routine's putting up an obligation to caller (to some other routine)
to satisfy conditions of precondition and conditions of invariant, and hers (called routine's) obligation
to satisfy conditions of postcondition and conditions of invariant.
The object oriented Eiffel programming language was created to implement DBC.
For now, other OO (object-oriented) languages don’t support directly the ideas behind DBC.
However, precondition and postcondition are applicable to many programming languages, both OO and not OO.
Invariants are applicable only in OOPL.
This is my attempt to use DBC methodology (including invariants) in Oracle PL/SQL.
Eiffel class interface (not like Java interface, but more like PL/SQL package specification)
from Bertrand Meyer's book "Object oriented software construction", second edition (OOSC2), 1997, page 390-391:
class interface STACK [G]
creation make
feature -- Initialization
make (n: INTEGER) is -- Alocate stack for a maximum of n elements
    require
      non_negative_capacity: n >= 0
    ensure
      capacity_set: capacity = n
    end
feature -- Access
capacity: INTEGER -- Maximum number of stack elements
count: INTEGER -- Number of stack elements
item: G is -– Top element
    require
      not_empty: not empty
    end
feature -- Status report
empty: BOOLEAN is –- Is stack empty?
    ensure
      empty_definition: Result = (count = 0)
    end
full: BOOLEAN is –- Is stack full?
    ensure
      full_definition: Result = (count = capacity)
    end
feature -- Element change
put (x: G) is –- Add x on top
    require
      not_full: not full
    ensure
      not_empty: not empty
      added_to_top: item = x
      one_more_item: count = old count + 1
    end
remove is -– Remove top element
    require
      not_empty: not empty
    ensure
      not_full: not full
      one_fewer: count = old count - 1
    end
invariant
count_non_negative: 0 <= count
count_bounded: count <= capacity
empty_if_no_elements: empty = (count = 0)
end -– class interface STACK
-- PL/SQL "equivalent":
-- Stack implementation - TABLE of INTEGER.
-- Eiffel has generic classes (like C++ templates and better than Java generics).
-- PL/SQL (now) has not generic classes or generic packages.
CREATE OR REPLACE TYPE array_t AS TABLE OF INTEGER
-- utility package:
CREATE OR REPLACE PACKAGE dbc AS
-- 0 = no check
-- 1 = check preconditions
-- 2 = check preconditions + postconditions
-- 3 = check preconditions + postconditions + invariants
c_no_check                  CONSTANT INTEGER := 0;
c_check_preconditions       CONSTANT INTEGER := 1;
c_check_pre_postconditions CONSTANT INTEGER := 2;
c_check_pre_post_invariants CONSTANT INTEGER := 3;
FUNCTION check_preconditions       RETURN BOOLEAN;
FUNCTION check_pre_postconditions RETURN BOOLEAN;
FUNCTION check_pre_post_invariants RETURN BOOLEAN;
PROCEDURE set_level (p_level INTEGER);
PROCEDURE display_error (p_error VARCHAR2);
END;
CREATE OR REPLACE PACKAGE BODY dbc AS
m_level INTEGER := c_no_check;
FUNCTION check_preconditions RETURN BOOLEAN IS
BEGIN
    IF m_level >= c_check_preconditions THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
FUNCTION check_pre_postconditions RETURN BOOLEAN IS
BEGIN
    IF m_level >= c_check_pre_postconditions THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
FUNCTION check_pre_post_invariants RETURN BOOLEAN IS
BEGIN
    IF m_level >= c_check_pre_post_invariants THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
PROCEDURE set_level (p_level INTEGER) IS
BEGIN
    IF p_level NOT IN
      (c_no_check, c_check_preconditions, c_check_pre_postconditions, c_check_pre_post_invariants)
    THEN
      RAISE_APPLICATION_ERROR (-20000, 'Wrong checking level');
    END IF;
    m_level := p_level;
END;
PROCEDURE display_error (p_error VARCHAR2) IS
BEGIN
    RAISE_APPLICATION_ERROR (-20000, 'ERROR in method ' || p_error);
END;
END;
CREATE OR REPLACE TYPE stack AS OBJECT (
-- Maximum number of stack elements
capacity INTEGER,
-- Number of stack elements
el_count INTEGER,
-- Stack implementation
stack_implementation array_t,
-- Alocate stack for a maximum of n elements
CONSTRUCTOR FUNCTION stack (n INTEGER) RETURN SELF AS RESULT,
-- Top element
MEMBER FUNCTION item (SELF IN OUT stack) RETURN INTEGER,
-- Is stack empty?
MEMBER FUNCTION empty RETURN BOOLEAN,
-- Is stack full?
MEMBER FUNCTION full RETURN BOOLEAN,
-- Add x on top
MEMBER PROCEDURE put (x INTEGER),
-- Remove top element
MEMBER PROCEDURE remove,
-- INVARIANTS
-- Note:
-- If subprogram is declared in an object type body (in PL/SQL 8i/9i/10g)
-- it must be defined in the object type specification too.
MEMBER FUNCTION count_non_negative RETURN BOOLEAN,
MEMBER FUNCTION count_bounded RETURN BOOLEAN,
MEMBER FUNCTION empty_if_no_elements RETURN BOOLEAN,
MEMBER PROCEDURE check_invariants
) NOT FINAL;
CREATE OR REPLACE TYPE BODY stack AS
CONSTRUCTOR FUNCTION stack (n INTEGER) RETURN SELF AS RESULT IS
BEGIN
    IF dbc.check_preconditions AND n < 0 THEN
      dbc.display_error ('stack - PRE');
    END IF;
    check_invariants;
    capacity := n;
    stack_implementation := array_t();
    stack_implementation.EXTEND (n);
    IF dbc.check_pre_postconditions AND capacity <> n THEN
      dbc.display_error ('stack - POST');
    END IF;
    check_invariants;
END;
MEMBER FUNCTION item (SELF IN OUT stack) RETURN INTEGER IS
BEGIN
    IF dbc.check_preconditions AND empty THEN
      dbc.display_error ('item - PRE');
    END IF;
    check_invariants;
    RETURN stack_implementation(el_count);
END;
MEMBER FUNCTION empty RETURN BOOLEAN IS
BEGIN
    IF el_count = 0 THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
MEMBER FUNCTION full RETURN BOOLEAN IS
BEGIN
    IF el_count = capacity THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
MEMBER PROCEDURE put (x INTEGER) IS
BEGIN
    IF dbc.check_preconditions AND full THEN
      dbc.display_error ('put - PRE');
    END IF;
    check_invariants;
    el_count := el_count + 1;
    stack_implementation(el_count) := x;
    -- PL/SQL has not Eiffel's OLD
    -- one_more_item: count = old count + 1
    IF dbc.check_pre_postconditions AND (empty OR item <> x) THEN
      dbc.display_error ('put - POST');
    END IF;
    check_invariants;
END;
MEMBER PROCEDURE remove IS BEGIN
    IF dbc.check_preconditions AND empty THEN
      dbc.display_error ('remove - PRE');
    END IF;
    check_invariants;
    el_count := el_count - 1;
    -- PL/SQL has not Eiffel's OLD
    -- one_fewer: count = old count - 1
    IF dbc.check_pre_postconditions AND full THEN
      dbc.display_error ('remove - POST');
    END IF;
    check_invariants;
END;
-- INVARIANTS
MEMBER FUNCTION count_non_negative RETURN BOOLEAN IS
BEGIN
    IF el_count >= 0 THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
MEMBER FUNCTION count_bounded RETURN BOOLEAN IS
BEGIN
    IF el_count <= capacity THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
MEMBER FUNCTION empty_if_no_elements RETURN BOOLEAN IS
BEGIN
    IF empty AND (el_count = 0)
       OR
       NOT empty AND (el_count <> 0)
    THEN
      RETURN TRUE;
    ELSE
      RETURN FALSE;
    END IF;
END;
MEMBER PROCEDURE check_invariants IS
BEGIN
    IF NOT dbc.check_pre_post_invariants THEN
      RETURN; -- without checking invariants
    END IF;
    IF NOT count_non_negative THEN
      dbc.display_error ('INVARIANT count_non_negative');
    END IF;
    IF NOT count_bounded THEN
      dbc.display_error ('INVARIANT count_bounded');
    END IF;
    IF NOT empty_if_no_elements THEN
      dbc.display_error ('INVARIANT empty_if_no_elements');
    END IF;
END;
END; -- class body STACK
/Regards,
Zlatko Sirotic

What are the basic pillars of Object Oriented Programming?

there are 3 pillars of OOP which are Encapsulation, inheritance, polymorphism, but i heard lot's of people even companies software engineers use abstraction is a pillar, i haven't find it from MSDN why abstraction is not a pillar ?

Whereas encapsulation, inheritence and polymorphism are specific implementation details of OOP (i.e. the key ideas that make programming
object-oriented), abstraction is a high-level way of looking at your overall application design.
For example, in a simple database application you would not want to write your code so that your user-interface, business logic, and database code was all hard-coded and "tied" to each other.
Ideally you would think about your design and try to plan your application so that your user-interface code is independent of your business logic code (which can be "plugged-in" and/or changed as necessary), which is again independent of your database
code such that you could even switch to a different database and only need to change that one part of your code-base.
As an example, you might not pass a class representing some business logic directly into your user-interface code. Rather, you may want to create an interface representing a generic way of representing your logic that could be re-used by lots of business
classes. It is then this interface that could be used by your UI code or database code to validate data, rather than specific classes. Then you could create more classes in future that just have to implement the same interfaces, knowing that the rest of your
code would not need to change. This is just one aspect of "abstraction".
If you do a search for "application design patterns" or "object-oriented design patterns" you will find plenty of articles and books on how to go about doing this.

Abap object oriented

Hi experts.,
i am very new in abap oo . please give me documentation and if possible sample code.
thanks in advance,

Some documentation related with OOPs Abao :
oops_beginers
http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
ALV Gird Control (BC-SRV-ALE)
SAP Container
SAP Control Framework
or Thread New To OOPs ABAP
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/abap/abap%20code%20samples/abap%20objects/abap%20code%20sample%20to%20learn%20basic%20concept%20of%20object-oriented%20programming.doc
General Tutorial for OOPS
check all the below links
http://www.sapgenie.com/abap/OO/index.htm
http://www.geocities.com/victorav15/sapr3/abap_ood.html
http://www.brabandt.de/html/abap_oo.html
Check this cool weblog:
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b6254f411d194a60000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
these links
http://help.sap.com/saphelp_47x200/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
For funtion module to class
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5954f411d194a60000e8353423/content.htm
for classes
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5c54f411d194a60000e8353423/content.htm
for methods
http://help.sap.com/saphelp_47x200/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm
for inheritance
http://help.sap.com/saphelp_47x200/helpdata/en/dd/4049c40f4611d3b9380000e8353423/content.htm
for interfaces
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b6254f411d194a60000e8353423/content.htm
Check these links.
http://www.henrikfrank.dk/abapuk.html
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/abap/abap%20code%20samples/abap%20objects/abap%20code%20sample%20to%20learn%20basic%20concept%20of%20object-oriented%20programming.doc
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/abap/abap%20code%20samples/alv%20grid/abap%20code%20sample%20to%20display%20data%20in%20alv%20grid%20using%20object%20oriented%20programming.doc
Go through the below links,
For Materials:
1) http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf -- Page no: 1291
2) http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
3) http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
4) http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
5) http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
6) http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
7) http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
8) http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
OO ABAP links:
1) http://www.erpgenie.com/sap/abap/OO/index.htm
2) http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
go through these links
http://www.erpgenie.com/abap/index.htm
http://sic.fh-lu.de/sic/bic.nsf/(vJobangebote)/EC8AD2AE0349CE92C12572200026FDB8/$File/Intern%20or%20Working%20Student%20as%20ABAB%20OO%20Developer.pdf?Open
http://help.sap.com/saphelp_nw2004s/helpdata/en/43/41341147041806e10000000a1553f6/frameset.htm
http://help.sap.com/saphelp_47x200/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
ABAP_OBJECTS_ENJOY_0 Template for Solutions of ABAP Object Enjoy Course
ABAP_OBJECTS_ENJOY_1 Model Solution 1: ABAP Objects Enjoy Course
ABAP_OBJECTS_ENJOY_2 Model Solution 2: ABAP Objects Enjoy Course
ABAP_OBJECTS_ENJOY_3 Model Solution 3: ABAP Objects Enjoy Course
ABAP_OBJECTS_ENJOY_4 Model Solution 4: ABAP Objects Enjoy Course
ABAP_OBJECTS_ENJOY_5 Model Solution 5: ABAP Objects Enjoy Course
DEMO_ABAP_OBJECTS Complete Demonstration for ABAP Objects
DEMO_ABAP_OBJECTS_CONTROLS GUI Controls on Screen
DEMO_ABAP_OBJECTS_EVENTS Demonstration of Events in ABAP Objects
DEMO_ABAP_OBJECTS_GENERAL ABAP Objects Demonstration
DEMO_ABAP_OBJECTS_INTERFACES Demonstration of Interfaces in ABAP Objects
DEMO_ABAP_OBJECTS_METHODS Demonstration of Methods in ABAP Objects
DEMO_ABAP_OBJECTS_SPLIT_SCREEN Splitter Control on Screen
check the below links lot of info and examples r there
http://www.sapgenie.com/abap/OO/index.htm
http://www.geocities.com/victorav15/sapr3/abap_ood.html
http://www.brabandt.de/html/abap_oo.html
Check this cool weblog:
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b6254f411d194a60000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
these links
http://help.sap.com/saphelp_47x200/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
For funtion module to class
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5954f411d194a60000e8353423/content.htm
for classes
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5c54f411d194a60000e8353423/content.htm
for methods
http://help.sap.com/saphelp_47x200/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm
for inheritance
http://help.sap.com/saphelp_47x200/helpdata/en/dd/4049c40f4611d3b9380000e8353423/content.htm
for interfaces
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b6254f411d194a60000e8353423/content.htm
For Materials:
1) http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf -- Page no: 1291
2) http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
3) http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
4) http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
5) http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
6) http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
7) http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
8) http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
1) http://www.erpgenie.com/sap/abap/OO/index.htm
2) http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
ALVOOPS
http://www.abap4.it/download/ALV.pdf
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e8a1d690-0201-0010-b7ad-d9719a415907
http://www.erpgenie.com/abap/controls/alvgrid.htm
OOPS with ABAP
https://www.sdn.sap.com/irj/sdn/wiki?path=/pages/viewpage.action&pageid=37566
/people/rich.heilman2/blog/2005/07/27/dynamic-internal-tables-and-structures--abap
http://www.sapgenie.com/abap/OO/
For understanding COntrol Frameworks in OO ABAP, check this.
http://www.sapgenie.com/abap/controls/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com.
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.geocities.com/victorav15/sapr3/abap_ood.html
http://www.brabandt.de/html/abap_oo.html
ALVOOPS
http://www.erpgenie.com/abap/controls/alvgrid.htm
OOPS with ABAP
https://www.sdn.sap.com/irj/sdn/wiki?path=/pages/viewpage.action&pageid=37566
/people/rich.heilman2/blog/2005/07/27/dynamic-internal-tables-and-structures--abap
http://www.sapgenie.com/abap/OO/
For understanding COntrol Frameworks in OO ABAP, check this.
http://www.sapgenie.com/abap/controls/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com.
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.geocities.com/victorav15/sapr3/abap_ood.html
http://www.brabandt.de/html/abap_oo.html
Regarding ALV Grid Control using OOPs concepts
Regarding ALV Grid Control using OOPs concepts
OOPS OO ABAP
http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
DIRLL DOWN AND INTERACTIVE REPORT
http://www.sap-img.com/abap/difference-between-drilldown-report-and-interactive-report.htm
PAGE BREAK FOR ALV LIST
check out this link
http://www.abap4.it/download/ALV.pdf
good book on ABAP objects(OOPS)
http://www.esnips.com/doc/bc475662-82d6-4412-9083-28a7e7f1ce09/Abap-Objects---An-Introduction-To-Programming-Sap-Applications
How to check Cluster Table Data
https://forums.sdn.sap.com/click.jspa?searchID=5215473&messageID=3520315
http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm
http://help.sap.com/saphelp_47x200/helpdata/en/81/415d363640933fe10000009b38f839/frameset.htm
Check this cool weblog:
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b6254f411d194a60000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://www.esnips.com/doc/375fff1b-5a62-444d-8ec1-55508c308b17/prefinalppt.ppt
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://www.allsaplinks.com/
http://www.sap-img.com/
http://www.sapgenie.com/
http://help.sap.com
http://www.sapgenie.com/abap/OO/
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/controls/index.htm
http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://www.esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://www.sapgenie.com/abap/OO/index.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
http://www.sapgenie.com/abap/OO/
these links
http://help.sap.com/saphelp_47x200/helpdata/en/ce/b518b6513611d194a50000e8353423/content.htm
For funtion module to class
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5954f411d194a60000e8353423/content.htm
for classes
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b5c54f411d194a60000e8353423/content.htm
for methods
http://help.sap.com/saphelp_47x200/helpdata/en/08/d27c03b81011d194f60000e8353423/content.htm
for inheritance
http://help.sap.com/saphelp_47x200/helpdata/en/dd/4049c40f4611d3b9380000e8353423/content.htm
for interfaces
http://help.sap.com/saphelp_47x200/helpdata/en/c3/225b6254f411d194a60000e8353423/content.htm
For Materials:
1) http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf -- Page no: 1291
2) http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
3) http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
4) http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
5) http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
6) http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
7) http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
8) http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
1) http://www.erpgenie.com/sap/abap/OO/index.htm
2) http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
COLOURING Single Columan
http://www.sapfans.com/forums/viewtopic.php?t=52107
Check this thread to get more idea about ALVs.
Interactive ALV
Rewards if useful.............
Minal

Object Orientated Programming

I am just picking Java up and have a couple grey areas of OOP that I don't quite understand.
Here is my current understanding-(Correct me in the errors/Help clarify the book):
Class-Everything needs a class, used as templates for objects.
Method-
Book Definition: Code that operates on data.
My Definition: All code that does something to data(I say all because a method like main() could have loads of code operating on loads of data) The book probably means all like I do.
- But the book says that OOP is data operating on code? What's up with the reverse in a method definition?
- What is code? What is data? Is data variables only?
What I think- Code is the stuff that does something.(Addition)
Data is the stuff that gets done too.(The two numbers being added)
Object-
Book Definition: When data and code link together.
My Definition: Son's if you will of Classes because the inherit all of the information of them. Objects are also specific examples of code that do something to specific data since all programs have objects in some way like:
System.out.println("Blah Blah");
System.out.println is the code? Blah Blah is the data? So an object is formed?
-or-
1 specific addition problem in a math book. Being the math book is the method, problem being the object, addition sign being the code, and the numbers the data.
When data is 'inherited' from a class into an object, can that data only be variables if not, what else can they be?

OOP is the combination of data and procedures on that day in a single, coordinated fashion. It also allows for things like method overloading / overridding, class inheritance, and abstract (pure virtual) classes, which theoretically allows more complicated objects to be built from the foundation of simpler ones.
I am just picking Java up and have a couple grey
areas of OOP that I don't quite understand.
Here is my current understanding-(Correct me in the
errors/Help clarify the book):
Class-Everything needs a class, used as templates for
objects.I think you may be confused. For one thing, generally only collections need class parameterization. For another thing, not everything has to be a class. A java program with only one class that never gets instantiated (ie starts the main method) is turing complete, so object orientation really only helps code organization and ease of understanding.
Method-
Book Definition: Code that operates on data.Not necessarily. Methods don't have to affect data.
My Definition: All code that does something to
to data(I say all because a method like main() could
have loads of code operating on loads of data) The
book probably means all like I do.
- But the book says that OOP is data operating on
code? What's up with the reverse in a method
definition?This makes no sense to me.
- What is code? What is data? Is data variables
s only?
What I think- Code is the stuff that does
s something.(Addition)
Data is the stuff that gets
ata is the stuff that gets done too.(The two numbers
being added)
Object-
Book Definition: When data and code link together.
My Definition: Son's if you will of Classes because
e the inherit all of the information of them.
Objects are also specific examples of code that do
o something to specific data since all programs have
objects in some way like:
System.out.println("Blah Blah");
System.out.println is the code? Blah Blah is the
data? So an object is formed?Yes. "Blah Blah" is a String object
-or-
1 specific addition problem in a math book. Being
the math book is the method, problem being the
object, addition sign being the code, and the numbers
the data.No. Book is the object, problem is the method
>
When data is 'inherited' from a class into an object,
can that data only be variables if not, what else can
they be?

Object oriented

I have completed a program that assigns letter grades to students and displays average.
Now i have to take this application and implement it into two separate java files one for implementation and the other for its definition (object oriented)
I have absolutely no clue on where to begin.
Im not asking for anyone to do this for me but i would apppreciate any advice, tips, or references i can use to guide me to breaking down my program into two files.
Thanks!
import javax.swing.*;
public class Grade {
     static final int MAX = 40;
     static final int MIDTERM = 25;
     static final int FINAL = 35;
     static final int ASSIGNMENTS = 25;
     static final int PROJECT = 15;
     public static void main (String [] args)
          int [] midterm = new int [MAX], finalExam = new int [MAX],
               assignments = new int [MAX], project = new int [MAX];
          String [] names = new String [MAX];
          int num;
          num = howMany();
          enterStudents(names, midterm, finalExam, assignments, project, num);
          output (names, midterm, finalExam, assignments, project, num);
     private static int howMany()
     { int number;
       number = Integer.parseInt(JOptionPane.showInputDialog("Enter number of students in this class: "));
       while (number < 0 || number > MAX)
             number = Integer.parseInt(JOptionPane.showInputDialog("ERROR -- maximum class size is "+MAX+" Enter number of students in this class: "));
       return number;
      private static int score(String requirement, String name)
           int value;
           value = Integer.parseInt(JOptionPane.showInputDialog("Enter " + requirement+" score for "+name+": "));
          while (value < 0 || value > 100)
               value = Integer.parseInt(JOptionPane.showInputDialog("ERROR -- this value represents a percentage and must be between 0 and 100, try again\n Enter " + requirement+" score for "+name+": "));
            return value;
       private static void enterStudents(String [] snames, int [] smids, int [] sfin, int [] sass, int [] sproj, int n)
            for (int i = 0; i < n; i++)
                 snames[i] = JOptionPane.showInputDialog( "Enter student "+(i+1)+"'s name: ");
                 smids[i] = score ("Midterm Exam", snames);
               sfin[i] = score ("Final Exam", snames[i]);
               sass[i] = score ("Assignments", snames[i]);
               sproj[i] = score ("Project", snames[i]);
     private static String letterGrade (int percent)
          switch (percent/10)
               case 9:
               case 10: return "A";
               case 8: return "B";
               case 7: return "C";
               case 6: return "D";
               default: return "F";
     private static int computeGrade (int mid, int fin, int assn, int proj)
          return (mid*MIDTERM+fin*FINAL+assn*ASSIGNMENTS+proj*PROJECT)/100;
     private static void output(String [] snames, int [] smids, int [] sfin, int [] sass, int [] sproj, int n)
          String info="Name Grade\n";
          int grade, total=0;
          for (int i = 0; i < n; i++)
          {System.out.println(info);
               grade=computeGrade(smids[i], sfin[i], sass[i], sproj[i]);
               total+=grade;
               info+= snames[i]+" " letterGrade(grade)"\n";
          JOptionPane.showMessageDialog(null, info + "\n-------------------------\nClass Average: "+ total/n);

Something like this
import javax.swing.JOptionPane;
public class SwimmerDefinition{
     public static void main(String[] args){
     implementation i=new implementation();
     int time1, time2;                      //integers for the two trials of the race
     String name = JOptionPane.showInputDialog(null,
          "Please enter the name of the swimmer");   //prompts the user for the swimmers name
     i.setName(name);
     String minutes1 = JOptionPane.showInputDialog(null,
          "Enter minutes of swimmer " + name);          //asks for the minutes of swimmers race for trial 1
     int m = Integer.parseInt(minutes1);
     String seconds1 = JOptionPane.showInputDialog(null,
          "Enter seconds of swimmer " + name);              //asks for the seconds of swimmers race for trial 1
     int s = Integer.parseInt(seconds1);
     i.setTime(m,s);
      time1=i.getTime();
     String minutes2 = JOptionPane.showInputDialog(null,
          "Enter minutes of swimmer " + name + " for trial 2 "); //asks for the minutes of swimmers race for trial 2
     int m2 = Integer.parseInt(minutes2);
     String seconds2 = JOptionPane.showInputDialog(null,
          "Enter seconds of swimmer " + name + " for trial 2 "); //asks for the seconds of swimmers race for trial 2
     int s2 = Integer.parseInt(seconds2);
     i.setTime(m2,s2);
      time2=i.getTime();
     if(i.bestTime(time1,time2))
     JOptionPane.showMessageDialog(null,"Best time of "+i.getName()+" is"+time2/60+ " minutes " +time2%60+ " seconds "); //compares two trials for the best times between the two, then outputs the best one
     else
     JOptionPane.showMessageDialog(null,"Best time of "+i.getName()+" is"+time1/60+ " minutes " +time1%60+ " seconds ");
}class implementation{
String name;
     int time; //declaring variables
     public String getName () {return name;} //returns name
     public int getTime () {return time;} //returns time
     public void setName(String n) { name = n;} //sets name
     public void setTime (int m, int s) {   //sets time in minutes and seconds
          if (m>0 && m < 20 && s >= 0 && s < 60)
               time = 60*m + s;
     public boolean bestTime (int m, int s)
          if (m>s){
               return true;} //boolean to determine the best time in minutes and seconds
          else
          return false;

SCDJWS Exam Objectives Oriented Book

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