建造者模式

描述

一次性建造多个产品，就是多工厂方法模式生成对象列表

示例

//基类
interface Animal {
    public void say();
}
// 实现类
class Dog implements Animal {
    @Override
    public void say(){
        Test.printMsg("Dog");
    }
}
class Cat implements Animal {
    @Override
    public void say(){
        Test.printMsg("Cat");
    }
}
//建造者类
class Builder {
     private List<Animal> list = new ArrayList<Animal>();
     public void dogs(int count){
         for(int i=0;i<count; i++){
             list.add(new Dog());
         }
     }
     public void cats(int count){
         for(int i=0;i<count; i++){
             list.add(new Cat());
         }
     }
}
//测试
public class Test {
    public static void printMsg(String msg){
        System.out.println(msg);
    }
    public static void main(String[] args){
        Builder builder = new Builder();
        builder.dogs(3);
        builder.cats(3);
    }
}