oops

[Former Member]

HI,

PLEASE SEND SOME EXAMPLE FOR INHERITANCE .

THANK YOU

ASHOK KUMAR

[Former Member]

Hi

REPORT YSUBDEL.

CLASS C1 DEFINITION.

PUBLIC SECTION.

METHODS : METH1.

DATA : NUM TYPE I VALUE 6.

PROTECTED SECTION.

DATA : num2 type i value 7.

METHODS METH2.

ENDCLASS.

CLASS C1 IMPLEMENTATION .

METHOD : METH1.

WRITE:/5 num.

endmethod.

METHOD : METH2.

WRITE:/5 ' I am meth2 '.

ENDMETHOD.

ENDCLASS.

CLASS C2 DEFINITION INHERITING FROM C1.

PUBLIC SECTION.

METHODS : M1.

ENDCLASS.

CLASS C2 IMPLEMENTATION.

METHOD M1.

CALL METHOD : meth1, meth2.

write:/5 num2.

endmethod.

endclass.

START-OF-SELECTION.

DATA : OREF TYPE REF TO C2.

CREATE OBJECT OREF.

REPORT YSUBDEL.

CLASS C1 DEFINITION.

PUBLIC SECTION.

METHODS : METH1.

PROTECTED SECTION.

METHODS METH2.

ENDCLASS.

CLASS C1 IMPLEMENTATION .

METHOD : METH1.

WRITE:/5 'I am meth1 in class C1'.

CALL METHOD METH2.

ENDMETHOD.

METHOD : METH2.

WRITE:/5 ' I am meth2 in class C1 '.

ENDMETHOD.

ENDCLASS.

CLASS C2 DEFINITION INHERITING FROM C1.

PUBLIC SECTION.

METHODS : METH1 redefinition .

PROTECTED SECTION.

METHODS : METH2 redefinition.

ENDCLASS.

CLASS C2 IMPLEMENTATION.

METHOD METH1.

WRITE:/5 'I am meth1 in class C2'.

call method meth2.

endmethod.

METHOD : METH2.

WRITE:/5 ' I am meth2 in class C2 '.

ENDMETHOD.

endclass.

START-OF-SELECTION.

DATA : OREF1 TYPE REF TO C1 ,

OREF2 TYPE REF TO C2.

CREATE OBJECT : OREF1 , OREF2.

CALL METHOD : OREF1->METH1 ,

OREF2->METH1.

<b>Reward points for useful Answers</b>

Regards

Anji

[sridevi_p]

Hi,

Go to tcode - ABAPDOCU

U get the list of ABAP documetns.

In it, cehck ABAP Objects --> Inheritance --> Inheritance in ABAP Objects

Tha adv is that u can run and learn at ease.

Regards,

Sridevi

<i>* Pls. assign poitns, if useful</i>

[Former Member]

hi

check with the following prog... just implemented simple functionalities

&----

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*& Report ZABAPOOP_INHERITANCE

*&

&----

---

*&

*&

&----

---

REPORT ZABAPOOP_INHERITANCE.

• begin of definition of a local class

class lcl_employee definition.

• public section is visible outside the class, generally methods are created here

public section.

types:

begin of t_employees,

no_emp type i,

name type string,

end of t_employees.

• declaration of methods

methods:

constructor

importing im_employee_no type i

im_employee_name type string,

display_employee.

• class methods are global for all instances

class-methods: display_no_of_emp.

• protected section

protected section.

class-data: g_no_of_emp type i.

private section.

data: g_employees type t_employees.

endclass.

class lcl_employee implementation.

method: constructor.

g_employees-no_emp = im_employee_no .

g_employees-name = im_employee_name.

endmethod.

method display_employee.

write 😕 'Employee', g_employees-no_emp ,g_employees-name .

endmethod.

method : display_no_of_emp.

write:/ 'Number of employees is:' , g_no_of_emp .

endmethod.

endclass.

data: g_emp_1 type ref to lcl_employee,

g_emp_2 type ref to lcl_employee.

start-of-selection.

create object g_emp_1

exporting im_employee_no = 1

im_employee_name = 'Dinesh Dhiman'.

create object g_emp_2

exporting im_employee_no = 2

im_employee_name = 'Ravish Goyal'.

CALL METHOD g_emp_1->display_employee.

CALL METHOD g_emp_2->display_employee.

Hope this helps to solve ur problem....

<b>do reward if useful....</b>

regards

dinesh

[Former Member]

Hi Ashok

REPORT zbc404_hf_events_2 .

*******************************************************

• Super class LCL_CompanyEmployees

*******************************************************

CLASS lcl_company_employees DEFINITION.

PUBLIC SECTION.

TYPES:

BEGIN OF t_employee,

no TYPE i,

name TYPE string,

wage TYPE i,

END OF t_employee.

METHODS:

constructor,

add_employee

IMPORTING im_no TYPE i

im_name TYPE string

im_wage TYPE i,

display_employee_list,

display_no_of_employees.

PRIVATE SECTION.

CLASS-DATA: i_employee_list TYPE TABLE OF t_employee,

no_of_employees TYPE i.

ENDCLASS.

*-- CLASS LCL_CompanyEmployees IMPLEMENTATION

CLASS lcl_company_employees IMPLEMENTATION.

METHOD constructor.

no_of_employees = no_of_employees + 1.

ENDMETHOD.

METHOD add_employee.

• Adds a new employee to the list of employees

DATA: l_employee TYPE t_employee.

l_employee-no = im_no.

l_employee-name = im_name.

l_employee-wage = im_wage.

APPEND l_employee TO i_employee_list.

ENDMETHOD.

METHOD display_employee_list.

• Displays all employees and there wage

DATA: l_employee TYPE t_employee.

WRITE: / 'List of Employees'.

LOOP AT i_employee_list INTO l_employee.

WRITE: / l_employee-no, l_employee-name, l_employee-wage.

ENDLOOP.

ENDMETHOD.

METHOD display_no_of_employees.

• Displays total number of employees

SKIP 3.

WRITE: / 'Total number of employees:', no_of_employees.

ENDMETHOD.

ENDCLASS.

*******************************************************

• Sub class LCL_BlueCollar_Employee

*******************************************************

CLASS lcl_bluecollar_employee DEFINITION

INHERITING FROM lcl_company_employees.

PUBLIC SECTION.

METHODS:

constructor

IMPORTING im_no TYPE i

im_name TYPE string

im_hours TYPE i

im_hourly_payment TYPE i,

add_employee REDEFINITION.

PRIVATE SECTION.

DATA:no TYPE i,

name TYPE string,

hours TYPE i,

hourly_payment TYPE i.

ENDCLASS.

*---- CLASS LCL_BlueCollar_Employee IMPLEMENTATION

CLASS lcl_bluecollar_employee IMPLEMENTATION.

METHOD constructor.

• The superclass constructor method must be called from the subclass

• constructor method

CALL METHOD super->constructor.

no = im_no.

name = im_name.

hours = im_hours.

hourly_payment = im_hourly_payment.

ENDMETHOD.

METHOD add_employee.

• Calculate wage an call the superclass method add_employee to add

• the employee to the employee list

DATA: l_wage TYPE i.

l_wage = hours * hourly_payment.

CALL METHOD super->add_employee

EXPORTING im_no = no

im_name = name

im_wage = l_wage.

ENDMETHOD.

ENDCLASS.

*******************************************************

• Sub class LCL_WhiteCollar_Employee

*******************************************************

CLASS lcl_whitecollar_employee DEFINITION

INHERITING FROM lcl_company_employees.

PUBLIC SECTION.

METHODS:

constructor

IMPORTING im_no TYPE i

im_name TYPE string

im_monthly_salary TYPE i

im_monthly_deductions TYPE i,

add_employee REDEFINITION.

PRIVATE SECTION.

DATA:

no TYPE i,

name TYPE string,

monthly_salary TYPE i,

monthly_deductions TYPE i.

ENDCLASS.

*---- CLASS LCL_WhiteCollar_Employee IMPLEMENTATION

CLASS lcl_whitecollar_employee IMPLEMENTATION.

METHOD constructor.

• The superclass constructor method must be called from the subclass

• constructor method

CALL METHOD super->constructor.

no = im_no.

name = im_name.

monthly_salary = im_monthly_salary.

monthly_deductions = im_monthly_deductions.

ENDMETHOD.

METHOD add_employee.

• Calculate wage an call the superclass method add_employee to add

• the employee to the employee list

DATA: l_wage TYPE i.

l_wage = monthly_salary - monthly_deductions.

CALL METHOD super->add_employee

EXPORTING im_no = no

im_name = name

im_wage = l_wage.

ENDMETHOD.

ENDCLASS.

*******************************************************

• R E P O R T

*******************************************************

DATA:

• Object references

o_bluecollar_employee1 TYPE REF TO lcl_bluecollar_employee,

o_whitecollar_employee1 TYPE REF TO lcl_whitecollar_employee.

START-OF-SELECTION.

• Create bluecollar employee obeject

CREATE OBJECT o_bluecollar_employee1

EXPORTING im_no = 1

im_name = 'Gylle Karen'

im_hours = 38

im_hourly_payment = 75.

• Add bluecollar employee to employee list

CALL METHOD o_bluecollar_employee1->add_employee

EXPORTING im_no = 1

im_name = 'Gylle Karen'

im_wage = 0.

• Create whitecollar employee obeject

CREATE OBJECT o_whitecollar_employee1

EXPORTING im_no = 2

im_name = 'John Dickens'

im_monthly_salary = 10000

im_monthly_deductions = 2500.

• Add bluecollar employee to employee list

CALL METHOD o_whitecollar_employee1->add_employee

EXPORTING im_no = 1

im_name = 'Karen Johnson'

im_wage = 0.

• Display employee list and number of employees. Note that the result

• will be the same when called from o_whitecollar_employee1 or

• o_bluecolarcollar_employee1, because the methods are defined

• as static (CLASS-METHODS)

CALL METHOD o_whitecollar_employee1->display_employee_list.

CALL METHOD o_whitecollar_employee1->display_no_of_employees.

************************************************************************************

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Regards,

Suruchi