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what is the difference between hashset and treeset in java?


HashSet:

HashSet extends AbstractSet and implements the Set interface. It not maintains any order for its elements. It uses hash table for storage.

TreeSet:

TreeSet extends AbstractSet and implements the NavigableSet interface. It maintains ascending order for its elements i.e. elements will be in sorted form.

HashSet maintains no order whereas TreeSet maintains ascending order.

Java interview questions on collections

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