<code>package ArrayListDemo;

import java.util.ArrayList;

public class ArrayListDemo7 {

public static void main(String[] args) {

//1.创建集合对象

ArrayList<Phone> list = new ArrayList<Phone>();

//2.创建手机对象

Phone ph1 = new Phone("小米",1000);

Phone ph2 = new Phone("苹果",8000);

Phone ph3 = new Phone("锤子",2999);

Phone ph4 = new Phone("鸭梨",1999);

//3.添加数据

list.add(ph1);

list.add(ph2);

list.add(ph3);

ArrayList<Phone> phoneInfo = getPhoneInfo(list);

phoneInfo.add(ph4);

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

Phone phone = phoneInfo.get(i);

System.out.println(phone.getPinpai()+","+phone.getJiage());

}

}

//技巧：

//如果我们要返回多个数据，可以把这些数据先放到一个容器当中，再把容器返回

//集合，数组

public static ArrayList<Phone> getPhoneInfo(ArrayList<Phone> list){

//定义一个集合，用于存储价格低于三千的对象

ArrayList<Phone> resultList = new ArrayList<Phone>();

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

Phone p = list.get(i);

int jiage = p.getJiage();

//如果当前手机的设备低于3000，那么就把手机对象添加到resultList中

if(jiage < 3000){

resultList.add(p);

}

}

return resultList;

}

}