enum

/*
 * ISO 3166
 */
public enum Country
{
  DE
  {
    @Override
    public String toString()
    {
      return "Germany";
    }
  },
  IT
  {
    @Override
    public String toString()
    {
      return "Italy";
    }
  },
  US
  {
    @Override
    public String toString()
    {
      return "United States";
    }
  }
}

public static void main(String[] args)
{
  System.out.println(Country.DE); // Germany
  System.out.println(Country.IT); // Italy
  System.out.println(Country.US); // United States
}