Creation Mode (II): abstractfactory (Abstract Factory)

The core factory category is no longer responsible for the creation of all products. Instead, it submits the specific creation work to sub-classes and becomes an abstract factory role. It is only responsible for providing interfaces that must be implemented by specific factory classes, but do not touch the details of which product class should be instantiated.

Example: Ask mm to go to McDonald's for a hamburger. Different mm has different tastes. It is annoying to remember every one. I usually use the factory method mode, take the mm to the waiter and say "I want a hamburger". What kind of hamburger should I ask the mm to tell the waiter directly.

 1   Interface Sample {
 2       Public   Void Say ();
 3 }
 4  
 5   Class Samplea Implements Sample {
6       Public   Void Say (){
 7 System. Out. println ("samplea ");
 8 }
 9 }
 10  
 11   Class Sampleb Implements Sample {
 12       Public   Void Say (){
 13 System. Out. println ("sampleb ");
 14 }
 15 }
 16   Abstract   Class Factory {
 17       Public   Abstract Sample create ();
 18 }
 19  
 20  Class Factorya Extends Factory {
 21       Public Sample create (){
 22           Return   New Samplea ();
 23 }
 24 }
 25  
 26   Class Factoryb Extends Factory {
 27       Public Sample create (){
 28           Return   New Sampleb ();
 29 }
 30 }
 31  
 32   Public   Class Test {
 33       Public  Static   Void Main (string [] ARGs ){
 34 Factory factorya = New Factorya ();
 35 Sample test1 = factorya. Create ();
 36 Test1.say ();
 37 Factory factoryb = New Factoryb ();
 38 Sample Test2 = factoryb. Create ();
 39 Test2.say ();
 40 }
 41 }