java program

• Write a method isUnique that accepts a Map from strings to strings as a parameter and returns true if no two keys map to the same value (and false if any two or more keys do map to the same value).
• For example, calling your method on the following map would return true: {Marty=Stepp, Stuart=Reges, Jessica=Miller, Amanda=Camp, Hal=Perkins}
• Calling it on the following map would return false, {Kendrick=Perkins, Stuart=Reges, Jessica=Miller, Bruce=Reges, Hal=Perkins}
• The empty map is considered to be unique, so your method should return true if passed an empty map.