Efficient retrieval of Keys using given Values in the Map

This asset provides a reusable code which can be used to retrieve the Keys when Values are given in Java maps.

BidiMap bidimap = new DualHashBidiMap();

bidimap.putAll(theMap);  
  
String myKey= bidimap.inverseBidiMap().get("Mumbai").toString();

System.out.println("The Key is :"  +  myKey) ;