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Anonymous Classes

• Commonly used in factory methods:
  

  public static Comparator comparatorByName() {
    return new Comparator() {
        public int compare(Object o1, Object o2) { . . . }
      };
   }
  

• Collections.sort(a, Country.comparatorByName());
• Neat arrangement if multiple comparators make sense
  (by name, by area, ...)
  

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