Search for a value in a List

Question

I have a collection of lists, that i initialized has HashMap <Integer, String [ ] >
In String [ 1] i have a name, and i want to check in all the list i have, on that HashMap, wich ones have the same value in String [1] and save the Int associated with that List.
Hope i wasn't very confusing.

Answer 1

i assume you want to iterate on the HashMap for a given name parameter and save all the key values which have that name appear on the string array at index 1

you could try this method implementation which returns an array list of the integers with the matching name in the index 1 array of the string:

public ArrayList<Integer> getNameKeys(String name, HashMap<Integer, String[]> map){
ArrayList<Integer> nameKeys = new ArrayList<Integer>();
for(Integer key: map.keySet()){
if(map.get(key)[1] == name)
nameKeys.add(key);
}
return nameKeys;
}