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

1 public interface Animal {

2     public void bark();

3 }

 

2.Dog.java

1 public class Dog implements Animal {

2 

3     @Override

4     public void bark() {

5         System.out.println("Dog wang wang !");

6     }

7 

8 }

 

3.Cat.java

1 public class Cat implements Animal {

2 

3     @Override

4     public void bark() {

5         System.out.println("cat miao miao");

6     }

7 

8 }

 

4.AnimalBuilder.java

 1 package Builder;

 2 

 3 import java.util.ArrayList;

 4 import java.util.List;

 5 

 6 public class AnimalBuilder {

 7 

 8     private static List<Animal> animals = new ArrayList<Animal>();

 9     

10     public static List<Animal> getDogs(int count){

11         for(int i = 0; i<count ;i++){

12             animals.add(new Dog());

13         }

14         return animals;

15     }

16     

17     public static List<Animal> getCat(int count){

18         for(int i = 0; i<count ;i++){

19             animals.add(new Cat());

20         }

21         return animals;

22     }

23 }

 

5.AnimalFactoryTest.java

 1 package Builder;

 2 

 3 import java.util.List;

 4 

 5 import org.junit.Test;

 6 

 7 public class AnimalFactoryTest {

 8 

 9     @Test

10     public void test() {

11         List<Animal> animals = AnimalBuilder.getDogs(3);

12         for(int i = 0; i<animals.size() ;i++){

13             animals.get(i).bark();

14         }

15     }

16 

17 }

 

 

三、运行结果