使用ArrayList集合存放HashMap集合

 1 package MapTest;
 2 
 3 import java.util.ArrayList;
 4 import java.util.HashMap;
 5 
 6 /**
 7  * 使用ArrayList集合存放HashMap集合：
 8  *  需求创建一个ArrayList集合，存储三个元素，每个元素类型为HashMap集合
 9  */
10 public class HashMapTest04 {
11     public static void main(String[] args) {
12         //创建一个HashMap对象
13         HashMap<String, String> hashMap = new HashMap<>();
14         //给HashMap添加三个元素
15         HashMap<String, String> hashMap1 = new HashMap<>();
16         hashMap1.put("MingYuan","20160401041035");
17         HashMap<String, String> hashMap2 = new HashMap<>();
18         hashMap2.put("MingYu","20160401041036");
19         HashMap<String, String> hashMap3 = new HashMap<>();
20         hashMap3.put("MingWuan","20160401041037");
21 //        System.out.println(hashMap);
22         //把HashMap集合存放入ArrayList集合中
23         ArrayList<HashMap<String, String>> arrayList = new ArrayList<>();
24         arrayList.add(hashMap1);
25         arrayList.add(hashMap2);
26         arrayList.add(hashMap3);
27         //遍历arraylist集合中的元素(增强for循环)
28         for (HashMap<String, String>Str :arrayList) {
29             System.out.println(Str);
30         }
31 
32     }
33 }

标签：HashMap,ArrayList,put,集合,new,arrayList
来源： https://www.cnblogs.com/nzm-2019/p/16577843.html