What are the differences between sets and lists in Java?
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What are the differences between sets and lists in Java?
In Java, a List is an ordered collection that allows duplicate elements, while a Set is an unordered collection that does not allow duplicates.
Can you give me examples of when to use a Set instead of a List?
Use a Set when you need to ensure that all elements are unique, like storing user IDs. Use a List when order matters, like maintaining a playlist.
What are the main implementations of Set and List in Java?
The main implementations of List are ArrayList and LinkedList. For Set, you have HashSet, LinkedHashSet, and TreeSet.
Are there performance differences between them?
Yes, Lists generally have faster access times for indexed elements, while Sets have faster operations for checking existence and uniqueness.
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