Access VBA:
"Constructors" Class_Initialize
When an object instance is created from a class, Access VBA calls a special parameter-less sub named Class_Initialize . Since you cannot specify parameters for this sub, you also cannot overload it.
When a class is destroyed, Access VBA calls a special sub called Class_Terminate .
More Info / Comment
ASP Classic:
"Constructors" Class_Initialize
When an object instance is created from a class, ASP calls a special parameter-less sub named Class_Initialize . Since you cannot specify parameters for this sub, you also cannot overload it.
When a class is destroyed, ASP calls a special sub called Class_Terminate .
Syntax Example: Class Cyborg Public CyborgName Public Sub Class_Initialize Response.Write "<br>Class created" CyborgName = "Cameron" End Sub End Class
C++:
"Constructors" Use Class name
A member function with the same name as the class.
Corel Paradox:
"Constructors" Not Supported
Delphi:
"Constructors" constructor
In Delphi, use the constructor keyword to signify which method or methods are constructors for a class. It is traditional but not required to use a procedure called Create .
In addition to having multiple named constructors, you can overload constructors.
Syntax Example: //Interface section. TCyborg = class(TObject) public constructor Create; end;
Then implement the class constructor in the Implementation section.
constructor TCyborg.Create; begin inherited; //Call the parent Create method end;
Delphi Prism:
"Constructors" constructor + class name
In Prism, a constructor is called whenever a class or struct is created. You use the constructor keyword with an unnamed method. You can overload the constructor simply by adding two or more unnamed methods with various parameters.
Prism also supports a Create constructor method for backward compatibility with Delphi for Win32.
If you do not create a constructor, Prism will create an implicit constructor that initializes all member fields to their default values.
Constructors can execute at two different times. Static constructors are executed by the CLR before any objects are instantiated. Regular constructors are executed when you create an object.
Syntax Example: Cyborg = public class public constructor (); constructor (pName: String );end ;
Java:
"Constructors" Use class name
A method with the same name as the class.
Syntax Example:
public class Cyborg{ //Constructors have the same name as the class. public Cyborg() { } }
VB Classic:
"Constructors" Class_Initialize
When an object instance is created from a class, VB6 calls a special parameter-less sub named Class_Initialize . Since you cannot specify parameters for this sub, you also cannot overload it.
When a class is destroyed, VB6 calls a special sub called Class_Terminate .
More Info / Comment
VB.Net:
"Constructors" New
In VB.Net, a constructor is called whenever a class or struct is created. A constructor is a sub named New . You can overload the constructor simply by adding two or more New subs with various parameters (overloaded constructors).
If you do not create a constructor, VB.Net will create an implicit constructor that initializes all member fields to their default values.
Constructors can execute at two different times. Static constructors are executed by the CLR before any objects are instantiated. Regular constructors are executed when you create an object.
You can invoke the parent constructor with MyBase.New .
Syntax Example: Public Class Cyborg Public CyborgName As String Public Sub New (ByVal pName As String) CyborgName = pName End Sub End Class