Get key from HashMap in Android by position or index

Question

I have:

public static HashMap<String, String> CHILD_NAME_DOB = new HashMap<>();

Suppose the values in CHILD_NAME_DOB are:

<adam,15121990>
<roy,01051995>
<neha,05091992>
<alisha,11051992>

I am trying to fetch the last key element from CHILD_NAME_DOB. That is, I want to fetch key alisha from the example above to temporary String name.

Also I want to know on how to fetch data by index.

Eg.: if int index = 2 , I want key "Neha" in String name

TIA.

Edit: DateOfBirth value (value data in CHILD_NAME_DOB) is dynamic and is unknown. So THIS LINK is not what I want.

Answer 1

This way to get key....

public static String getHashMapKeyFromIndex(HashMap hashMap, int index){

    String key = null;
    HashMap <String,Object> hs = hashMap;
    int pos=0;
    for(Map.Entry<String, Object> entry : hs.entrySet())
    {
        if(index==pos){
            key=entry.getKey();
        }
        pos++;
    }
    return key;

}