java">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;}
}