import java.util.*;

public class Cocktail
{

   private int aSpirit;
   public static String inputChoice()
   {
      // create a list of Integer type
      List<Integer> list = new ArrayList<>();
      // add 4 element in ArrayList
      list.add(1);
      list.add(2);
      list.add(3);
      list.add(4);

      Cocktail spirit = new Cocktail();
      // take a random element from list and print them
      int aSpirit = spirit.getRandomElement(list);
      if (aSpirit == 1)
      {
         return ("Vodka");
      }
      else if (aSpirit == 2)
      {
         return ("Rum");
      }
      else if (aSpirit == 3)
      {
         return ("Gin");
      }
      else
      {
         return ("Other");
      }
   }

   // Function select an element base on index
   // and return an element
   public int getRandomElement(List<Integer> list)
   {
      Random rand = new Random();
      return list.get(rand.nextInt(list.size()));
   }

   public void addMapEntry()
   {
      Map<String, Set<String>> cocktailMap = new HashMap<>();
      Set<String> ingredients = new HashSet<>();

      ingredients.add("Vodka");
      ingredients.add("Gin");
      ingredients.add("Tequila");
      ingredients.add("Rum");
      ingredients.add("Triple Sec");
      cocktailMap.put("LIIT", ingredients);

      ingredients.add("Rum");
      cocktailMap.put("Mojito", ingredients);

      ingredients.add("Gin");
      ingredients.add("Creme de Mure");
      cocktailMap.put("Bramble", ingredients);

      ingredients.add("Vodka");
      cocktailMap.put("Martini", ingredients);

      // Set<String> randomCocktail = aSpirit;
      String stringOut;
      Set<String> eachCocktail;
      Set<String> cross;

      for (String aCocktail : cocktailMap.keySet())
      {
         eachCocktail = cocktailMap.get(aCocktail);
         cross = new HashSet<>(aSpirit);
         cross.retainAll(eachCocktail);
         stringOut = "The " + aSpirit + " cocktails are " + eachCocktail;
         System.out.println(stringOut);
      }

   }
}