Constructor

Former Member — Sun, 27 Jan 2008 09:21:33 GMT

What is constructor in Abap objects. Please explain with example.

Re: Constructor

Former Member — Sun, 27 Jan 2008 09:39:40 GMT

Hi,

Constructor method

Implicitly, each class has an instance constructor method with the reserved name constructor and a static constructor method with the reserved name class_constructor.

The instance constructor is executed each time you create an object (instance) with the CREATE OBJECT statement, while the class constructor is executed exactly once before you first access a class.

The constructors are always present. However, to implement a constructor you must declare it explicitly with the METHODS or CLASS-METHODS statements. An instance constructor can have IMPORTING parameters and exceptions. You must pass all non-optional parameters when creating an object. Static constructors have no parameters.

Static constructor

The static constructor is always called CLASS_CONSTRUCTER, and is called autmatically before the clas is first accessed, that is before any of the following actions are executed:

1) Creating an instance using CREATE_OBJECT

2) Adressing a static attribute using <classname>-><attrbute>

3) Calling a ststic attribute using CALL METHOD

4) Registering a static event handler

5) Registering an evetm handler method for a static event

The static constructor cannot be called explicitly.

check out this link for example program using constructor...

http://www.erpgenie.com/abap/OO/eg.htm#Use constructor to create an object with parameters

Reward points if useful **

Regards,

Shanthi.P

topic Constructor in Application Development and Automation Discussions

Constructor

Re: Constructor