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
  

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