Data structure to hold the data into the map into key value pairs

Question

I am basically trying to create the data structre

Map<String, Map<String, List<String>>>

I have a map as shown below in which there is a key and values are of type List :

 Map<String, List<String> newdatamap = new HashMap<>();
    map.put ("payerName", Arrays.asList("wpn", "wpfnb", "dgeft", "xbthy"));
    map.put ("fixedRate", Arrays.asList("dd", "ww", "trrty", "httyure"))

I'd like to add another map over the previous map, such that there is a key and its value will be the above map. Is this the correct data structure, and how do we implement it?

I want something like this shown below

Key         Value

B1          payerName  ----> "wpn", "wpfnb", "dgeft", "xbthy"
            fixedRate ----->"dd", "ww", "trrty", "httyure"



B2          payerName  ----> "SSSwpn", "wpfSSSnb", "GGGdgeft", "xbtYYYYhy"
            fixedRate ----->"WWdd", "wTTYw", "YYYYtrrty", "IIIhttyure"

As shown above, only a new key has been introduced to the map, and its value is the previous map. So please advise how to create such map

Map<String, Map<String, List<String>>>.

Well I have tried through Google guava library I have shown below but I want to achieve same through java itself. Please advise how can i achieve the same through java

final Table<String, String, List<String>> values = HashBasedTable.create();
values.put("B1", "payerName", Lists.newArrayList("wpn", "wpfnb", "dgeft", "xbthy"));
System.out.println(values.get("B1", "payerName")); // prints the list

Answer 1

You are almost there:

Map<String, Map<String, List<String>>> map = new HashMap<> ();
map.put("B1", newdatamap);

Answer 2

Few more details to the answer of assylias

    Map<String, Map<String, List<String>>> ultimateMap = new HashMap<String,Map<String, List<String>>> ();

    Map<String, List<String>> map1 = new HashMap<String, List<String>>();
    map1.put ("payerName", Arrays.asList("wpn", "wpfnb", "dgeft", "xbthy"));
    map1.put ("fixedRate", Arrays.asList("dd", "ww", "trrty", "httyure"));

    Map<String, List<String>> map2 = new HashMap<String, List<String>>();
    map2.put ("payerName", Arrays.asList("SSSwpn", "wpfSSSnb", "GGGdgeft", "xbtYYYYhy"));
    map2.put ("fixedRate", Arrays.asList("WWdd", "wTTYw", "YYYYtrrty", "IIIhttyure"));

    ultimateMap.put("B1", map1);
    ultimateMap.put("B2", map2);

I could not add it as a comment to the previous answer (too long). So added as a new answer.

Answer 3

It's beyond the scope of the question, but as OP asked me in the comment I'm answering here:

class Info {
  public final String payerName;
  public final String fixedrate;

  public Info(String pn, String fr) {
    payerName = pn;
    fixedRate = fr;
  }
}

[...]

Collection<Info> myInfo = new LinkedList<>();
myInfo.add(new Info("wpn", "dd"));
myInfo.add(new Info("wpfnb", "ww"));
myInfo.add(new Info("dgeft", "trrty"));
myInfo.add(new Info("xbthy", "httyure"));
Map<String, Collection<Info>> myData = new HashMap<>();
myData.put("B1", myInfo);