设计模式 UML & java code

 

 

A: 创造性模式

1. 工厂方法模式(FactoryMethod)

1.1 类图

1.2 代码1

public interface Pet
{
    public String petSound();
}

public class Cat implements Pet {
    @Override
    public String petSound() {
        return "Meaw Meaw...";
    }
}

public class Dog implements Pet {
    @Override
    public String petSound() {
        return "Bow Bow...";
    }
}

public class PetFactory {
    public Pet getPet(String petType){
        Pet pet = null;
        if("Bow".equals(petType)){
            pet = new Dog();
        }else if("Meaw".equals(petType)){
            pet = new Cat();
        }
        return pet;
    }
}

public class SampleFactoryMethod {
    public static void main(String[] args){
        PetFactory factory = new PetFactory();
        Pet pet = factory.getPet("Bow");
        System.out.println(pet.petSound());
    }
}

View Code