Anonymous Classes

• No need to name objects that are used only once
  

  Collections.sort(countries,
     new CountryComparatorByName());
  

• No need to name classes that are used only once
  

  Comparator<Country> comp = new
     Comparator<Country>()
     {
        public int compare(Country country1, Country country2)
        { 
           return country1.getName().compareTo(country2.getName());
        } 
     };