如何存储 HashMap<String, ArrayList<String>>在列表中? [英] How can I store HashMap&lt;String, ArrayList&lt;String&gt;&gt; inside a list?

问题描述

我的哈希图将字符串存储为键，将数组列表存储为值.现在，我需要将其嵌入到列表中.也就是说，它将采用以下形式:

My hashmap stores the string as key and arraylist as the values. Now, I need to embed this into a list. That is, it will be of the following form:

List<HashMap<String, ArrayList<String>>>

这些是我使用过的声明:

These are the declarations I have used:

Map<String, ArrayList<String>> map = new HashMap<String, ArrayList<String>>();
ArrayList<String> arraylist = new ArrayList<String>();
map.put(key,arraylist);
List<String> list = new ArrayList<String>();

谁能帮我在列表中使用哪种方法和方法来继续将我的地图存储到其中?

Can anyone help me which method and how to use in the list to proceed storing my map into it?

推荐答案

始终尝试在 Collection 中使用接口引用，这增加了更多的灵活性.
下面的代码有什么问题?

Always try to use interface reference in Collection, this adds more flexibility.
What is the problem with the below code?

List<Map<String,List<String>>> list = new ArrayList<Map<String,List<String>>>();//This is the final list you need
Map<String, List<String>> map1 = new HashMap<String, List<String>>();//This is one instance of the  map you want to store in the above list.
List<String> arraylist1 = new ArrayList<String>();
arraylist1.add("Text1");//And so on..
map1.put("key1",arraylist1);
//And so on...
list.add(map1);//In this way you can add.

你可以像上面一样轻松地做到这一点.

You can easily do it like the above.

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