java - 我收到一个字符串数组，并希望根据数组中收到的字符串访问 HashMap

Question

 given String arr[] = {"hashmap1", "hashmap2"};
 Hashmap<String,Integer> hashmap1;
 Hashmap<String,Integer> hashmap2;

我该怎么做:

for(int i=0;i<arr.length;i++){
   System.out.println(arr[i].get("value")); 

 // basically, arr[i] is the hashmap name and I want to access it
 }

我尝试将所有 hashmap 放入 arraylist 中，然后从那里开始，但这也不起作用。

for(int i=0;i<cardNames.length;i++){

            boolean tmp = cardNames[i].containsKey(storeType);

我收到此错误:

error: cannot find symbol boolean tmp = cardNames[i].get(storeType); ^ symbol: method get(String) location: class String

Answer 1

我相信您可以做的就是为您拥有的所有 map 创建一个 map ，并以名称作为键。

类似这样的事情:

 Map<String, Map<String,Integer>> superHashMap = new HashMap<>();
 String arr[] = {"hashmap1", "hashmap2"};
 Hashmap<String,Integer> hashmap1;
 Hashmap<String,Integer> hashmap2;

 superHashMap.put("hashmap1", hashmap1);
 superHashMap.put("hashmap2", hashmap2);

 How can I do this:
 for(int i=0;i<arr.length;i++){
   // This shall contain the desired hashMap that you would need for further processing.
   Map<String, Integer> mapYouNeedToAccess = superHashMap.get(arr[i]);
 }