6. Big talk design model-factory Model

What is the difference between the factory model and the simple factory. Not much nonsense. we can clearly see the first example.

Advantage: the factory mode makes up for the violation of the open-closed principle in the simple factory mode, and maintains the advantages of the encapsulated object creation process.

 

Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. text;
Using system. Threading. tasks;

Namespace designmodel
{
Public interface Factory
{
JS createjs ();
}

Public class JS
{
Public int NUMA {Get; set ;}
Public int numb {Get; set ;}

Public Virtual int getresult ()
{
Return 0;
}
}

Public class Add1: JS
{
Public override int getresult ()
{
Return NUMA + numb;
}

}

Public class sub1: JS
{
Public override int getresult ()
{
Return NUMA-numb;
}
}

Public class addfactory: Factory
{
Public JS createjs ()
{
Return new Add1 ();
}
}

Public class subfactory: Factory
{
Public JS createjs ()
{
Return new sub1 ();
}
}

}

 

Client call:

Factory factory = new addfactory ();
JS = factory. createjs ();
JS. NUMA = 1;
JS. Numb = 2;
Console. writeline (JS. getresult ());


Factory F = new subfactory ();
Js j = f. createjs ();
J. NUMA = 9;
J. Numb = 0;
Console. writeline (J. getresult ());
Console. Readline ();