public class constructors

7/21/2019 Public Class Constructors

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Working with constructors (Global Class)

By Sravanthi

1. Constructors are special methods that cannot be called using CALL METH!. "nstead# they arecalled automatically by the system to set the starting state o$ a ne% ob&ect or class.

'. Constructors are methods %ith a prede$ined name. To use them# you must declare them e(plicitlyin the class.

). There are t%o types o$ constructors * "nstance constructors and Static constructors.

The "nstance constructor o$ a class is the prede$ined instance method CONSTRUCTOR.

The constructor+s signature can have only importing parameters or e(ceptions.

"nstance Constructor is a special instance method can access the "nstance ,ariables and

Static ,ariables.

This method is used to set the de$ault values in a class.

The Static constructor o$ a class is the prede$ined static method CLASS_CONSTRUCTOR.

The constructor+s signature cannot have importing parameters or e(ceptions.

The static constructor is as special static method can access the static variables.

These are used to set de$ault values $or the global attributes irrespective o$ instances.

Multiple "nstance and Static Constructors cannot be used in one class.

Creating the Instance Constructorand Static Constructorusing SE'- /lobal class0

Step1 /o to SE'-Create /lobal Class 2C3ST45CT46SALES

Step2 Select the Class and Clic7 on Continue.


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Step3 Continue %ith the de$ault settings

Step4 /o to MethodsCreate Methods.

Step5 Constructor Method can be created ' %ays.

10 /o to MenuEditCreate Constructor

'0 Clic7 on Constructor as sho%n belo%

Step6 As soon clic7 on ConstructorConstructor Method is automatically de$aulted in the Methods.

This method is used o initial the values $or the ob&ect


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Step7 Create another method Select to $etch the data $rom the ,BA8 table

Step8 Select the Constructor MethodSelect the 9arameters and Create the 9arameter

Step The parameter "M6,BEL3 is used to importing into Constructor Method. 5sed to initiali:e thevalue

Step1! ;or the Constructor# parameter type is al%ays importing. 3o other 9arameter type can beassigned


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Step11" /o to Type TabCreate Structure ty6vba7 and ,isibility 9ublic0

Step12" Clic7 on !irect Type Entry

Step13" To declare the Structure %ith re


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Working with constructors (Global Class)

...#re$ious

Step14" t6vba7 is de$aulted in the Types tab %hich has be declared in earlier step

Step15 "n the Attributes TabCreate ,6,BEL3 type vba7*vbeln.

Step16 !ouble clic7 the Constructor and "mplement the code.
http://saptechnical.com/Tutorials/OOPS/Constructor/Index.htmhttp://saptechnical.com/Tutorials/OOPS/Constructor/Index.htm


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Step17" /o to Select MethodCreate 9arameters

Step18" /o to Select Method!ouble Clic7 the Method and "mplement the code

Step18" Activate the Class and /o to SE)=Create a 9rogram 2C3ST45CT46SALES.

"mplement the code and e(ecute the 9rogram


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Step2!" E(ecute the 9rogram %ithout giving any sales document number.

Step21" The utput is displayed as sho%n belo% %ith the Constructor method %ith the de$ault initial

values

Step22" /ive the Sales !ocument as ->?1


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Step23" The output is displayed $or the corresponding Sales document

Static Constructor

Step24 @ithin the Same /lobal Class Create the Static Constructor. Clic7 on Class Constructor

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MenuEditCreate Class Constructor.

Step25 Class Constructor Method is de$aulted as sho%n belo% as soon as the Class Constructor is

Clic7ed or Selected.


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Step26 Select the Class Constructor and Clic7 on 9arameters$ollo%ing message is displayed.

Class Constructor does not have 9arameters.

Step27 !ouble Clic7 the Class6Constructor method and %rite the @rite Statement

Step28 /o to SE)= and e(ecute the same program 2C3ST45CT46SALES. The Class

Constructor is triggered.


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public class constructors

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