public static void main(String[] args) { List list = new ArrayList<>(); HashMap map = new HashMap<String,Object>(); map.put("name", "zhou"); map.put("age", 20); map.put("Address", "hubei"); map
1.Java代码: package com; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.Map; public class ListTest { public ListTest(){} public ArrayList<Double> sumList(ArrayList<Double> arrayList){ double sum =