Factory mode in Java

The factory model in Java, the personal understanding is: To make a car, you must have wheels, engines, seats and so on.

1. Create an interface and make the wheel, engine, and seat three implementations of the class implement this interface.

2. Create a factory that generates an object based on the entity class of the given information.

1    Public classPart Factory {2       3      4       PublicShape Gets the part (String part name) {5         if(Part name = =NULL){6            return NULL;7         }        8         if(part name. Equalsignorecase ("Wheels"))){9            return Newwheel Class ();Ten}Else if(part name. Equalsignorecase ("Engine"))){ One           return Newengine class (); A}Else if(part name. Equalsignorecase ("seat"))){ -           return Newseat type (); -        } the        return NULL; -     } -}

3. Caller code

1    Public classProduction {2   3       Public Static voidMain (string[] args) {4Part Factory factory =Newparts Factory ();5     6The wheel obtained by the public interface = Factory. Getshape ("Wheel");7    8         9The seat obtained by the public interface = Factory. Getshape ("Seat");Ten        One     } A}

　　

　

Factory mode in Java