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Java / Collections

What are the similarities between HashSet, LinkedHashSet and TreeSet In Java?

Although these implementations had considerable difference, there share similarities with each other.

  • None of them allow duplicate elements.
  • None of them are synchronized.
  • All are Cloneable and Serializable.
  • Iterator returned by these implementations are fail-fast i.e We will encounter ConcurrentModificationException if the collection is modified after the creation of Iterator object.
  • Last but not least all implement Set interface.

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List and its implementations

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