Java-马士兵设计模式学习笔记-建造者模式

一、概述

二、代码

1.Animal.java

public interface Animal {
    public void bark();
}

2.Dog.java

public class Dog implements Animal {

    @Override
    public void bark() {
        System.out.println("Dog wang wang !");
    }

}

3.Cat.java

public class Cat implements Animal {

    @Override
    public void bark() {
        System.out.println("cat miao miao");
    }

}

4.AnimalBuilder.java

package Builder;

import java.util.ArrayList;
import java.util.List;

public class AnimalBuilder {

    private static List<Animal> animals = new ArrayList<Animal>();
    
    public static List<Animal> getDogs(int count){
        for(int i = 0; i<count ;i++){
            animals.add(new Dog());
        }
        return animals;
    }
    
    public static List<Animal> getCat(int count){
        for(int i = 0; i<count ;i++){
            animals.add(new Cat());
        }
        return animals;
    }
}

5.AnimalFactoryTest.java

package Builder;

import java.util.List;

import org.junit.Test;

public class AnimalFactoryTest {

    @Test
    public void test() {
        List<Animal> animals = AnimalBuilder.getDogs(3);
        for(int i = 0; i<animals.size() ;i++){
            animals.get(i).bark();
        }
    }

}

三、运行结果