Hand design mode

Factory mode definition, create an object interface, but the subclass determines which class is to be instantiated. The factory method lets the class defer instantiation to the subclass.

Abstract Pizza Commodity Class

Java code

Public abstract class Piazzstore {public
piazz getpiazz (String name) {
piazz piazz = Createpiazz (nam　e);　　　
Piazz.make (); return
piazz;
}
Let subclasses implement public
abstract Piazz createpiazz (String name);
　　　　　　　　　

China Pizza Store

Java code

public class Chinapiazzstore extends Piazzstore {
@Override public
piazz createpiazz (String name) {
 //TODO auto-generated method Stub
if (Name.equals (PiazzEnum.ChinaPiazzOnHuAn.getVal ())} {return
new Hu　Anpiazz ();
}else if (Name.equals (PiazzEnum.ChinaPiazzOnHuBei.getVal ())) {return
new Hubeipiazz ();
} else{
throw new RuntimeException ("Piazz name is Error");}}