1 import java.util.HashMap;
2 import java.util.Scanner;
3
4 /*
5 定义一个HashMap集合,并加入23、56、98、7四个元素,求总和及平均值
6 */
7 public class Demo {
8 public static void main(String[] args){
9 Scanner sc = new Scanner(System.in);
10 HashMap<Integer, Integer> hashMap = new HashMap<>();
11 hashMap.put(1,23);
12 hashMap.put(2,56);
13 hashMap.put(3,98);
14 hashMap.put(4,7);
15 int sum = hashMap.get(1)+hashMap.get(2)+hashMap.get(3)+hashMap.get(4);
16 System.out.println("总和为:" + sum);
17 int avg = sum / 4 ;
18 System.out.println("平均值为:" + avg);
19 }
20 }