Java Design Pattern serialization (1)-factory method pattern

1. Java design mode serialization (1) --- factory method mode

 

Intent:

Defines an interface used to create objects, so that the subclass determines which class to instantiate. Factory method delays the instantiation of a class to its subclass.

Applicability:

• When a class does not know the class of the object it must create.
• When a class wants its subclass to specify the object it creates.
• When a class delegates the responsibility of creating an object to one of multiple help sub-classes, and you want to localize the information of which help sub-classes are proxies.
  

Instance:

1. Define a factory interface for clothes production

package Factory_Method_Pattern;public interface ClothesFactory  {  public  Clothes  productClothes();      }

2. Implement the interface of this clothing factory to define the type of clothes to be produced.

package Factory_Method_Pattern;public class AdultClothesFactory implements ClothesFactory {@Overridepublic  Clothes  productClothes() {  return  new  AdultClothes();}}

 

package Factory_Method_Pattern;public class ChildClothesFactory implements ClothesFactory {@Overridepublic  Clothes  productClothes() {  return new  ChildClothes();}}

3. Define clothes interface (clothes are used for clothing)

package Factory_Method_Pattern;public interface Clothes{ public  void  dressClothes();}

4. Clothes interface, clothes, and people

Package factory_method_pattern; public class adultclothes implements clothes {@ overridepublic void dressclothes () {system. Out. println ("clothes produced by a friend Clothes Factory, wear by a friend ");}}

 

Package factory_method_pattern; public class childclothes implements clothes {@ overridepublic void dressclothes () {system. Out. println ("clothes produced by children's clothing factory, children wear ");}}

 

5. Test this mode.

 

package Factory_Method_Pattern;public class Test{    public static void main(String[] args){           ClothesFactory  clothesFactory =  new    ChildClothesFactory();               clothesFactory.productClothes().dressClothes();                ClothesFactory    adultClothesFactory  =  new AdultClothesFactory();                adultClothesFactory.productClothes().dressClothes();        }}

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