How to create a 2 way map in java

Question

I need a data structure to store string-int value pairs in an 1:1 relationship, and being able too look up from either way their counterpart.

I wrote a class with a

Answer 1

Create a hashmap that maps Object to Object - then you can use the same map to store String -> Integer and Integer -> String.

When you add a string/int pair just add it both ways to the same map.