Invert a Map
Create a public class called
Inverter with a single class method named
invert should accept a
Map<String, Integer> and return a
Map<Integer, String> with all of the key-value
You can assert that the passed map is not
Because values are not necessarily unique in a map, normally you would need a way to determine what the right approach is when two keys map to the same value. However, the maps passed to your function will not have any duplicate values.