java 23种设计模式解析-工厂方法

子类对象由工厂创建，

     public abstract Factory {
         abstract public Product factor();
        
     }
    public class  FactoryA implements Factory {//生产对象A的工厂

        @Override
        public Product factor() {
            return new ProductA();
        }
    }
    public class  FactoryB implements Factory {//生产对象A的工厂

        @Override
        public Product factor() {
            return new ProductB();
        }
    }
   
   public class  ProductA implements Product{}//需求对象A
   public class  ProductB implements Product{} 需求对象B

   public interface Product {


   }
public class Test{

public static void main(String args[]){
    Factory f=new  FactoryA();
    Product p= f.factor();
}
}